From 88024b24ff0548e121db34a52e640e6bd2bc0d9d Mon Sep 17 00:00:00 2001
From: sozud <122322823+sozud@users.noreply.github.com>
Date: Tue, 20 Aug 2024 16:02:21 -0700
Subject: [PATCH] More dedupes (#1555)

---
 config/symbols.us.stcen.txt    |   1 +
 config/symbols.us.stdre.txt    |   1 +
 config/symbols.us.stno3.txt    |   1 +
 config/symbols.us.stnp3.txt    |   1 +
 config/symbols.us.stnz0.txt    |   1 +
 config/symbols.us.stst0.txt    |   1 +
 src/st/cen/18084.c             | 262 +-------------------------------
 src/st/dre/1E1C8.c             | 264 +--------------------------------
 src/st/e_misc.h                | 263 +-------------------------------
 src/st/initialize_unk_entity.h |  25 ++++
 src/st/mad/15520.c             |  40 +----
 src/st/make_entity_from_id.h   |  20 +++
 src/st/make_explosions.h       |  19 +++
 src/st/no3/48A84.c             | 257 +-------------------------------
 src/st/no3/53F38.c             |   2 +-
 src/st/np3/48238.c             |   2 +-
 src/st/np3/e_misc.c            | 261 +-------------------------------
 src/st/nz0/4070C.c             | 261 +-------------------------------
 src/st/nz0/e_spittle_bone.c    |   6 +-
 src/st/st0/37308.c             | 260 +-------------------------------
 src/st/unk_collision_func4.h   | 171 +++++++++++++++++++++
 src/st/unk_collision_func5.h   |  23 +++
 22 files changed, 307 insertions(+), 1835 deletions(-)
 create mode 100644 src/st/initialize_unk_entity.h
 create mode 100644 src/st/make_entity_from_id.h
 create mode 100644 src/st/make_explosions.h
 create mode 100644 src/st/unk_collision_func4.h
 create mode 100644 src/st/unk_collision_func5.h

diff --git a/config/symbols.us.stcen.txt b/config/symbols.us.stcen.txt
index aa6bc4fd5..89833953a 100644
--- a/config/symbols.us.stcen.txt
+++ b/config/symbols.us.stcen.txt
@@ -5,6 +5,7 @@ unk14_yVel = 0x80181148;
 unk14_startFrame = 0x80181160;
 unk14_lifetime = 0x80181164;
 g_olroxDroolCollOffsets = 0x8018116C;
+g_UnkEntityAnimData = 0x80181174;
 g_UnkRecursPrimVecOrder = 0x80181184;
 g_UnkRecursPrim2Inds = 0x801811A4;
 g_ESoulStealOrbAngles = 0x801811C8;
diff --git a/config/symbols.us.stdre.txt b/config/symbols.us.stdre.txt
index a1fa7cb27..820dd747d 100644
--- a/config/symbols.us.stdre.txt
+++ b/config/symbols.us.stdre.txt
@@ -23,6 +23,7 @@ unk14_yVel = 0x8018130C;
 unk14_startFrame = 0x80181324;
 unk14_lifetime = 0x80181328;
 g_olroxDroolCollOffsets = 0x80181330;
+g_UnkEntityAnimData = 0x80181338;
 g_UnkRecursPrimVecOrder = 0x80181348;
 g_UnkRecursPrim2Inds = 0x80181368;
 g_ESoulStealOrbAngles = 0x8018138C;
diff --git a/config/symbols.us.stno3.txt b/config/symbols.us.stno3.txt
index 6e01540df..abdf5f1e7 100644
--- a/config/symbols.us.stno3.txt
+++ b/config/symbols.us.stno3.txt
@@ -23,6 +23,7 @@ unk14_yVel = 0x80182650;
 unk14_startFrame = 0x80182668;
 unk14_lifetime = 0x8018266C;
 g_olroxDroolCollOffsets = 0x80182674;
+g_UnkEntityAnimData = 0x8018267C;
 g_UnkRecursPrimVecOrder = 0x8018268C;
 g_UnkRecursPrim2Inds = 0x801826AC;
 g_ESoulStealOrbAngles = 0x801826D0;
diff --git a/config/symbols.us.stnp3.txt b/config/symbols.us.stnp3.txt
index afb8dfecf..d0b7baff2 100644
--- a/config/symbols.us.stnp3.txt
+++ b/config/symbols.us.stnp3.txt
@@ -8,6 +8,7 @@ unk14_yVel = 0x80181FDC;
 unk14_startFrame = 0x80181FF4;
 unk14_lifetime = 0x80181FF8;
 g_olroxDroolCollOffsets = 0x80182000;
+g_UnkEntityAnimData = 0x80182008;
 g_UnkRecursPrimVecOrder = 0x80182018;
 g_UnkRecursPrim2Inds = 0x80182038;
 g_ESoulStealOrbAngles = 0x8018205C;
diff --git a/config/symbols.us.stnz0.txt b/config/symbols.us.stnz0.txt
index e8eb2199f..00642d208 100644
--- a/config/symbols.us.stnz0.txt
+++ b/config/symbols.us.stnz0.txt
@@ -10,6 +10,7 @@ unk14_yVel = 0x80181F04;
 unk14_startFrame = 0x80181F1C;
 unk14_lifetime = 0x80181F20;
 g_olroxDroolCollOffsets = 0x80181F28;
+g_UnkEntityAnimData = 0x80181F30;
 g_UnkRecursPrimVecOrder = 0x80181F40;
 g_UnkRecursPrim2Inds = 0x80181F60;
 g_eBlueDoorUV = 0x801826B8;
diff --git a/config/symbols.us.stst0.txt b/config/symbols.us.stst0.txt
index 61ea58107..44bb360de 100644
--- a/config/symbols.us.stst0.txt
+++ b/config/symbols.us.stst0.txt
@@ -20,6 +20,7 @@ unk14_yVel = 0x80181ED8;
 unk14_startFrame = 0x80181EF0;
 unk14_lifetime = 0x80181EF4;
 g_olroxDroolCollOffsets = 0x80181EFC;
+g_UnkEntityAnimData = 0x80181F04;
 g_UnkRecursPrimVecOrder = 0x80181F14;
 g_UnkRecursPrim2Inds = 0x80181F34;
 g_ESoulStealOrbAngles = 0x80181F54;
diff --git a/src/st/cen/18084.c b/src/st/cen/18084.c
index 84efe6538..1cc476212 100644
--- a/src/st/cen/18084.c
+++ b/src/st/cen/18084.c
@@ -14,270 +14,18 @@
 
 #include "../entity_olrox_drool.h"
 
-bool func_801988B0(Point16* unk) {
-    Collider collider;
+#include "../unk_collision_func5.h"
 
-    FallEntity();
-    g_CurrentEntity->posX.val += g_CurrentEntity->velocityX;
-    g_CurrentEntity->posY.val += g_CurrentEntity->velocityY;
-
-    if (g_CurrentEntity->velocityY >= 0) {
-        s16 posX = g_CurrentEntity->posX.i.hi;
-        s16 posY = g_CurrentEntity->posY.i.hi;
-        posX += unk->x;
-        posY += unk->y;
-        g_api.CheckCollision(posX, posY, &collider, 0);
-        if (collider.effects & EFFECT_SOLID) {
-            g_CurrentEntity->posY.i.hi += collider.unk18;
-            g_CurrentEntity->velocityY = -g_CurrentEntity->velocityY / 2;
-            if (g_CurrentEntity->velocityY > FIX(-1.0)) {
-                return true;
-            }
-        }
-    }
-    return false;
-}
-
-u8 func_801989AC(s32 arg0) {
-    Collider collider;
-    u32 bits_67;
-    u32 bits_45;
-    u32 bits_23;
-    u8 bits_01;
-    u16 collEff;
-
-    MoveEntity();
-    bits_67 = 0;
-    bits_23 = 0;
-    bits_45 = 0;
-    bits_01 = arg0 & 3;
-    collEff = 0;
-    switch (bits_01) {
-    case 0:
-        g_CurrentEntity->posY.i.hi += 3;
-        g_api.CheckCollision(g_CurrentEntity->posX.i.hi,
-                             g_CurrentEntity->posY.i.hi, &collider, 0);
-        if (collider.effects != 0) {
-            collEff = collider.effects;
-            g_CurrentEntity->posY.i.hi += collider.unk18;
-            g_api.CheckCollision(
-                g_CurrentEntity->posX.i.hi,
-                (s16)(g_CurrentEntity->posY.i.hi - 4), &collider, 0);
-            if (collider.effects & EFFECT_UNK_0002) {
-                bits_67 = 0x40;
-                if (g_CurrentEntity->velocityX > 0) {
-                    bits_01 = 2;
-                } else {
-                    bits_01 = 3;
-                    g_CurrentEntity->velocityX = -g_CurrentEntity->velocityX;
-                }
-                g_CurrentEntity->velocityY = -g_CurrentEntity->velocityX;
-                g_CurrentEntity->velocityX = 0;
-            }
-        } else {
-            bits_67 = 0x80;
-            g_CurrentEntity->posX.val -= g_CurrentEntity->velocityX;
-            if (g_CurrentEntity->velocityX > 0) {
-                bits_01 = 3;
-            } else {
-                bits_01 = 2;
-                g_CurrentEntity->velocityX = -g_CurrentEntity->velocityX;
-            }
-            g_CurrentEntity->velocityY = g_CurrentEntity->velocityX;
-            g_CurrentEntity->velocityX = 0;
-        }
-        break;
-
-    case 1:
-        g_CurrentEntity->posY.i.hi -= 3;
-        g_api.CheckCollision(g_CurrentEntity->posX.i.hi,
-                             g_CurrentEntity->posY.i.hi, &collider, 0);
-        if (collider.effects != 0) {
-            collEff = collider.effects;
-            g_CurrentEntity->posY.i.hi += collider.unk20;
-            g_api.CheckCollision(
-                g_CurrentEntity->posX.i.hi,
-                (s16)(g_CurrentEntity->posY.i.hi + 4), &collider, 0);
-            if (collider.effects & EFFECT_UNK_0002) {
-                bits_67 = 0x40;
-                if (g_CurrentEntity->velocityX > 0) {
-                    bits_01 = 2;
-                } else {
-                    bits_01 = 3;
-                    g_CurrentEntity->velocityX = -g_CurrentEntity->velocityX;
-                }
-                g_CurrentEntity->velocityY = g_CurrentEntity->velocityX;
-                g_CurrentEntity->velocityX = 0;
-            }
-        } else {
-            bits_67 = 0x80;
-            g_CurrentEntity->posX.val -= g_CurrentEntity->velocityX;
-            if (g_CurrentEntity->velocityX > 0) {
-                bits_01 = 3;
-            } else {
-                bits_01 = 2;
-                g_CurrentEntity->velocityX = -g_CurrentEntity->velocityX;
-            }
-            g_CurrentEntity->velocityY = -g_CurrentEntity->velocityX;
-            g_CurrentEntity->velocityX = 0;
-        }
-        break;
-
-    case 2:
-        g_CurrentEntity->posX.i.hi += 3;
-        g_api.CheckCollision(g_CurrentEntity->posX.i.hi,
-                             g_CurrentEntity->posY.i.hi, &collider, 0);
-        if (collider.effects != 0) {
-            collEff = collider.effects;
-            g_CurrentEntity->posX.i.hi += collider.unk14;
-            g_api.CheckCollision((s16)(g_CurrentEntity->posX.i.hi - 4),
-                                 g_CurrentEntity->posY.i.hi, &collider, 0);
-            if (collider.effects & EFFECT_SOLID) {
-                bits_67 = 0x40;
-                if (g_CurrentEntity->velocityY > 0) {
-                    bits_01 = 0;
-                } else {
-                    bits_01 = 1;
-                    g_CurrentEntity->velocityY = -g_CurrentEntity->velocityY;
-                }
-                g_CurrentEntity->velocityX = -g_CurrentEntity->velocityY;
-                g_CurrentEntity->velocityY = 0;
-            }
-        } else {
-            bits_67 = 0x80;
-            g_CurrentEntity->posY.val -= g_CurrentEntity->velocityY;
-            if (g_CurrentEntity->velocityY > 0) {
-                bits_01 = 1;
-            } else {
-                bits_01 = 0;
-                g_CurrentEntity->velocityY = -g_CurrentEntity->velocityY;
-            }
-            g_CurrentEntity->velocityX = g_CurrentEntity->velocityY;
-            g_CurrentEntity->velocityY = 0;
-        }
-        break;
-
-    case 3:
-        g_CurrentEntity->posX.i.hi -= 3;
-        g_api.CheckCollision(g_CurrentEntity->posX.i.hi,
-                             g_CurrentEntity->posY.i.hi, &collider, 0);
-        if (collider.effects != 0) {
-            collEff = collider.effects;
-            g_CurrentEntity->posX.i.hi += collider.unk1C;
-            g_api.CheckCollision((s16)(g_CurrentEntity->posX.i.hi + 4),
-                                 g_CurrentEntity->posY.i.hi, &collider, 0);
-            if (collider.effects & EFFECT_SOLID) {
-                bits_67 = 0x40;
-                if (g_CurrentEntity->velocityY > 0) {
-                    bits_01 = 0;
-                } else {
-                    bits_01 = 1;
-                    g_CurrentEntity->velocityY = -g_CurrentEntity->velocityY;
-                }
-                g_CurrentEntity->velocityX = g_CurrentEntity->velocityY;
-                g_CurrentEntity->velocityY = 0;
-            }
-        } else {
-            bits_67 = 0x80;
-            g_CurrentEntity->posY.val -= g_CurrentEntity->velocityY;
-            if (g_CurrentEntity->velocityY > 0) {
-                bits_01 = 1;
-            } else {
-                bits_01 = 0;
-                g_CurrentEntity->velocityY = -g_CurrentEntity->velocityY;
-            }
-            g_CurrentEntity->velocityX = -g_CurrentEntity->velocityY;
-            g_CurrentEntity->velocityY = 0;
-        }
-    }
-
-    if (collEff & EFFECT_UNK_8000) {
-        bits_23 = 4;
-    }
-    if (collEff & EFFECT_UNK_1000) {
-        bits_23 = 8;
-    }
-    if (collEff & EFFECT_UNK_2000) {
-        bits_23 = 0xC;
-    }
-    if (collEff & EFFECT_UNK_0800) {
-        bits_45 = 0x20;
-    }
-    if (collEff & EFFECT_UNK_4000) {
-        bits_45 = 0x10;
-    }
-    bits_01 = (bits_45 + (bits_23 + (bits_67 + bits_01)));
-    return bits_01;
-}
+#include "../unk_collision_func4.h"
 
 // ID 06
 #include "../entity_intense_explosion.h"
 
-extern u8 D_80181174[];
+#include "../initialize_unk_entity.h"
 
-void func_8019902C(Entity* entity) {
-    if (!entity->step) {
-        InitializeEntity(g_InitializeEntityData0);
-        entity->unk6C = 0xF0;
-        entity->rotX = 0x1A0;
-        entity->rotY = 0x1A0;
-        entity->animSet = ANIMSET_DRA(8);
-        entity->animCurFrame = 1;
-        entity->zPriority += 0x10;
+#include "../make_entity_from_id.h"
 
-        if (entity->params != 0) {
-            entity->palette = entity->params;
-        } else {
-            entity->palette = 0x8160;
-        }
-
-        entity->step++;
-        return;
-    }
-
-    MoveEntity();
-
-    if (!AnimateEntity(D_80181174, entity)) {
-        DestroyEntity(entity);
-    }
-}
-
-void func_801990F8(u16 entityId, Entity* src, Entity* dst) {
-    DestroyEntity(dst);
-    dst->entityId = entityId;
-    dst->pfnUpdate = PfnEntityUpdates[entityId - 1];
-    dst->posX.i.hi = src->posX.i.hi;
-    dst->posY.i.hi = src->posY.i.hi;
-    dst->unk5A = src->unk5A;
-    dst->zPriority = src->zPriority;
-    dst->animSet = src->animSet;
-    dst->flags = FLAG_UNK_2000 | FLAG_UNK_01000000 | FLAG_UNK_04000000 |
-                 FLAG_UNK_08000000 | FLAG_DESTROY_IF_BARELY_OUT_OF_CAMERA |
-                 FLAG_DESTROY_IF_OUT_OF_CAMERA;
-
-    if (src->palette & 0x8000) {
-        dst->palette = src->hitEffect;
-    } else {
-        dst->palette = src->palette;
-    }
-}
-
-void func_801991C0(void) {
-    Entity* entity;
-    s8 temp_s4 = Random() & 3;
-    s16 temp_s3 = ((Random() & 0xF) << 8) - 0x800;
-    s32 i;
-
-    for (i = 0; i < 6; i++) {
-        entity = AllocEntity(&g_Entities[224], &g_Entities[256]);
-        if (entity != NULL) {
-            CreateEntityFromEntity(2, g_CurrentEntity, entity);
-            entity->ext.generic.unk84.U8.unk1 = 6 - i;
-            entity->ext.generic.unk80.modeS16.unk0 = temp_s3;
-            entity->ext.generic.unk84.U8.unk0 = temp_s4;
-        }
-    }
-}
+#include "../make_explosions.h"
 
 #include "../entity_big_red_fireball.h"
 
diff --git a/src/st/dre/1E1C8.c b/src/st/dre/1E1C8.c
index 31bcdc3da..3dc84ab97 100644
--- a/src/st/dre/1E1C8.c
+++ b/src/st/dre/1E1C8.c
@@ -14,271 +14,17 @@
 
 #include "../entity_olrox_drool.h"
 
-bool func_8019E9F4(Point16* arg0) {
-    Collider collider;
+#include "../unk_collision_func5.h"
 
-    FallEntity();
-    g_CurrentEntity->posX.val += g_CurrentEntity->velocityX;
-    g_CurrentEntity->posY.val += g_CurrentEntity->velocityY;
-
-    if (g_CurrentEntity->velocityY >= 0) {
-        s16 posX = g_CurrentEntity->posX.i.hi;
-        s16 posY = g_CurrentEntity->posY.i.hi;
-        posX += arg0->x;
-        posY += arg0->y;
-
-        g_api.CheckCollision(posX, posY, &collider, 0);
-
-        if (collider.effects & EFFECT_SOLID) {
-            g_CurrentEntity->posY.i.hi += collider.unk18;
-            g_CurrentEntity->velocityY = -g_CurrentEntity->velocityY / 2;
-
-            if (g_CurrentEntity->velocityY > FIX(-1.0)) {
-                return true;
-            }
-        }
-    }
-
-    return false;
-}
-
-u8 func_8019EAF0(s32 arg0) {
-    Collider collider;
-    u32 bits_67;
-    u32 bits_45;
-    u32 bits_23;
-    u8 bits_01;
-    u16 collEff;
-
-    MoveEntity();
-    bits_67 = 0;
-    bits_23 = 0;
-    bits_45 = 0;
-    bits_01 = arg0 & 3;
-    collEff = 0;
-    switch (bits_01) {
-    case 0:
-        g_CurrentEntity->posY.i.hi += 3;
-        g_api.CheckCollision(g_CurrentEntity->posX.i.hi,
-                             g_CurrentEntity->posY.i.hi, &collider, 0);
-        if (collider.effects != 0) {
-            collEff = collider.effects;
-            g_CurrentEntity->posY.i.hi += collider.unk18;
-            g_api.CheckCollision(
-                g_CurrentEntity->posX.i.hi,
-                (s16)(g_CurrentEntity->posY.i.hi - 4), &collider, 0);
-            if (collider.effects & EFFECT_UNK_0002) {
-                bits_67 = 0x40;
-                if (g_CurrentEntity->velocityX > 0) {
-                    bits_01 = 2;
-                } else {
-                    bits_01 = 3;
-                    g_CurrentEntity->velocityX = -g_CurrentEntity->velocityX;
-                }
-                g_CurrentEntity->velocityY = -g_CurrentEntity->velocityX;
-                g_CurrentEntity->velocityX = 0;
-            }
-        } else {
-            bits_67 = 0x80;
-            g_CurrentEntity->posX.val -= g_CurrentEntity->velocityX;
-            if (g_CurrentEntity->velocityX > 0) {
-                bits_01 = 3;
-            } else {
-                bits_01 = 2;
-                g_CurrentEntity->velocityX = -g_CurrentEntity->velocityX;
-            }
-            g_CurrentEntity->velocityY = g_CurrentEntity->velocityX;
-            g_CurrentEntity->velocityX = 0;
-        }
-        break;
-
-    case 1:
-        g_CurrentEntity->posY.i.hi -= 3;
-        g_api.CheckCollision(g_CurrentEntity->posX.i.hi,
-                             g_CurrentEntity->posY.i.hi, &collider, 0);
-        if (collider.effects != 0) {
-            collEff = collider.effects;
-            g_CurrentEntity->posY.i.hi += collider.unk20;
-            g_api.CheckCollision(
-                g_CurrentEntity->posX.i.hi,
-                (s16)(g_CurrentEntity->posY.i.hi + 4), &collider, 0);
-            if (collider.effects & EFFECT_UNK_0002) {
-                bits_67 = 0x40;
-                if (g_CurrentEntity->velocityX > 0) {
-                    bits_01 = 2;
-                } else {
-                    bits_01 = 3;
-                    g_CurrentEntity->velocityX = -g_CurrentEntity->velocityX;
-                }
-                g_CurrentEntity->velocityY = g_CurrentEntity->velocityX;
-                g_CurrentEntity->velocityX = 0;
-            }
-        } else {
-            bits_67 = 0x80;
-            g_CurrentEntity->posX.val -= g_CurrentEntity->velocityX;
-            if (g_CurrentEntity->velocityX > 0) {
-                bits_01 = 3;
-            } else {
-                bits_01 = 2;
-                g_CurrentEntity->velocityX = -g_CurrentEntity->velocityX;
-            }
-            g_CurrentEntity->velocityY = -g_CurrentEntity->velocityX;
-            g_CurrentEntity->velocityX = 0;
-        }
-        break;
-
-    case 2:
-        g_CurrentEntity->posX.i.hi += 3;
-        g_api.CheckCollision(g_CurrentEntity->posX.i.hi,
-                             g_CurrentEntity->posY.i.hi, &collider, 0);
-        if (collider.effects != 0) {
-            collEff = collider.effects;
-            g_CurrentEntity->posX.i.hi += collider.unk14;
-            g_api.CheckCollision((s16)(g_CurrentEntity->posX.i.hi - 4),
-                                 g_CurrentEntity->posY.i.hi, &collider, 0);
-            if (collider.effects & EFFECT_SOLID) {
-                bits_67 = 0x40;
-                if (g_CurrentEntity->velocityY > 0) {
-                    bits_01 = 0;
-                } else {
-                    bits_01 = 1;
-                    g_CurrentEntity->velocityY = -g_CurrentEntity->velocityY;
-                }
-                g_CurrentEntity->velocityX = -g_CurrentEntity->velocityY;
-                g_CurrentEntity->velocityY = 0;
-            }
-        } else {
-            bits_67 = 0x80;
-            g_CurrentEntity->posY.val -= g_CurrentEntity->velocityY;
-            if (g_CurrentEntity->velocityY > 0) {
-                bits_01 = 1;
-            } else {
-                bits_01 = 0;
-                g_CurrentEntity->velocityY = -g_CurrentEntity->velocityY;
-            }
-            g_CurrentEntity->velocityX = g_CurrentEntity->velocityY;
-            g_CurrentEntity->velocityY = 0;
-        }
-        break;
-
-    case 3:
-        g_CurrentEntity->posX.i.hi -= 3;
-        g_api.CheckCollision(g_CurrentEntity->posX.i.hi,
-                             g_CurrentEntity->posY.i.hi, &collider, 0);
-        if (collider.effects != 0) {
-            collEff = collider.effects;
-            g_CurrentEntity->posX.i.hi += collider.unk1C;
-            g_api.CheckCollision((s16)(g_CurrentEntity->posX.i.hi + 4),
-                                 g_CurrentEntity->posY.i.hi, &collider, 0);
-            if (collider.effects & EFFECT_SOLID) {
-                bits_67 = 0x40;
-                if (g_CurrentEntity->velocityY > 0) {
-                    bits_01 = 0;
-                } else {
-                    bits_01 = 1;
-                    g_CurrentEntity->velocityY = -g_CurrentEntity->velocityY;
-                }
-                g_CurrentEntity->velocityX = g_CurrentEntity->velocityY;
-                g_CurrentEntity->velocityY = 0;
-            }
-        } else {
-            bits_67 = 0x80;
-            g_CurrentEntity->posY.val -= g_CurrentEntity->velocityY;
-            if (g_CurrentEntity->velocityY > 0) {
-                bits_01 = 1;
-            } else {
-                bits_01 = 0;
-                g_CurrentEntity->velocityY = -g_CurrentEntity->velocityY;
-            }
-            g_CurrentEntity->velocityX = -g_CurrentEntity->velocityY;
-            g_CurrentEntity->velocityY = 0;
-        }
-    }
-
-    if (collEff & EFFECT_UNK_8000) {
-        bits_23 = 4;
-    }
-    if (collEff & EFFECT_UNK_1000) {
-        bits_23 = 8;
-    }
-    if (collEff & EFFECT_UNK_2000) {
-        bits_23 = 0xC;
-    }
-    if (collEff & EFFECT_UNK_0800) {
-        bits_45 = 0x20;
-    }
-    if (collEff & EFFECT_UNK_4000) {
-        bits_45 = 0x10;
-    }
-    bits_01 = (bits_45 + (bits_23 + (bits_67 + bits_01)));
-    return bits_01;
-}
+#include "../unk_collision_func4.h"
 
 #include "../entity_intense_explosion.h"
 
-void func_8019F170(Entity* entity) {
-    if (!entity->step) {
-        InitializeEntity(g_InitializeEntityData0);
-        entity->unk6C = 0xF0;
-        entity->rotX = 0x1A0;
-        entity->rotY = 0x1A0;
-        entity->animSet = ANIMSET_DRA(8);
-        entity->animCurFrame = 1;
-        entity->zPriority += 0x10;
+#include "../initialize_unk_entity.h"
 
-        if (entity->params != 0) {
-            entity->palette = entity->params;
-        } else {
-            entity->palette = 0x8160;
-        }
+#include "../make_entity_from_id.h"
 
-        entity->step++;
-        return;
-    }
-
-    MoveEntity();
-
-    if (!AnimateEntity(D_80181338, entity)) {
-        DestroyEntity(entity);
-    }
-}
-
-void func_8019F23C(u16 entityId, Entity* src, Entity* dst) {
-    DestroyEntity(dst);
-    dst->entityId = entityId;
-    dst->pfnUpdate = PfnEntityUpdates[entityId - 1];
-    dst->posX.i.hi = src->posX.i.hi;
-    dst->posY.i.hi = src->posY.i.hi;
-    dst->unk5A = src->unk5A;
-    dst->zPriority = src->zPriority;
-    dst->animSet = src->animSet;
-    dst->flags = FLAG_UNK_2000 | FLAG_UNK_01000000 | FLAG_UNK_04000000 |
-                 FLAG_UNK_08000000 | FLAG_DESTROY_IF_BARELY_OUT_OF_CAMERA |
-                 FLAG_DESTROY_IF_OUT_OF_CAMERA;
-
-    if (src->palette & 0x8000) {
-        dst->palette = src->hitEffect;
-    } else {
-        dst->palette = src->palette;
-    }
-}
-
-void func_8019F304(void) {
-    Entity* entity;
-    s8 temp_s4 = Random() & 3;
-    s16 temp_s3 = ((Random() & 0xF) << 8) - 0x800;
-    s32 i;
-
-    for (i = 0; i < 6; i++) {
-        entity = AllocEntity(&g_Entities[224], &g_Entities[256]);
-        if (entity != NULL) {
-            CreateEntityFromEntity(2, g_CurrentEntity, entity);
-            entity->ext.generic.unk84.U8.unk1 = 6 - i;
-            entity->ext.generic.unk80.modeS16.unk0 = temp_s3;
-            entity->ext.generic.unk84.U8.unk0 = temp_s4;
-        }
-    }
-}
+#include "../make_explosions.h"
 
 #include "../entity_big_red_fireball.h"
 
diff --git a/src/st/e_misc.h b/src/st/e_misc.h
index 279d88748..b03025c4b 100644
--- a/src/st/e_misc.h
+++ b/src/st/e_misc.h
@@ -117,272 +117,21 @@ u32 g_olroxDroolCollOffsets[] = {
 };
 #include "entity_olrox_drool.h"
 
-bool func_8018FC4C(Point16* unk) {
-    Collider collider;
+#include "unk_collision_func5.h"
 
-    FallEntity();
-    g_CurrentEntity->posX.val += g_CurrentEntity->velocityX;
-    g_CurrentEntity->posY.val += g_CurrentEntity->velocityY;
-
-    if (g_CurrentEntity->velocityY >= 0) {
-        s16 posX = g_CurrentEntity->posX.i.hi;
-        s16 posY = g_CurrentEntity->posY.i.hi;
-        posX += unk->x;
-        posY += unk->y;
-        g_api.CheckCollision(posX, posY, &collider, 0);
-        if (collider.effects & EFFECT_SOLID) {
-            g_CurrentEntity->posY.i.hi += collider.unk18;
-            g_CurrentEntity->velocityY = -g_CurrentEntity->velocityY / 2;
-            if (g_CurrentEntity->velocityY > FIX(-1.0)) {
-                return true;
-            }
-        }
-    }
-    return false;
-}
-
-u8 func_8018FD48(s32 arg0) {
-    Collider collider;
-    u32 bits_67;
-    u32 bits_45;
-    u32 bits_23;
-    u8 bits_01;
-    u16 collEff;
-
-    MoveEntity();
-    bits_67 = 0;
-    bits_23 = 0;
-    bits_45 = 0;
-    bits_01 = arg0 & 3;
-    collEff = 0;
-    switch (bits_01) {
-    case 0:
-        g_CurrentEntity->posY.i.hi += 3;
-        g_api.CheckCollision(g_CurrentEntity->posX.i.hi,
-                             g_CurrentEntity->posY.i.hi, &collider, 0);
-        if (collider.effects != 0) {
-            collEff = collider.effects;
-            g_CurrentEntity->posY.i.hi += collider.unk18;
-            g_api.CheckCollision(
-                g_CurrentEntity->posX.i.hi,
-                (s16)(g_CurrentEntity->posY.i.hi - 4), &collider, 0);
-            if (collider.effects & EFFECT_UNK_0002) {
-                bits_67 = 0x40;
-                if (g_CurrentEntity->velocityX > 0) {
-                    bits_01 = 2;
-                } else {
-                    bits_01 = 3;
-                    g_CurrentEntity->velocityX = -g_CurrentEntity->velocityX;
-                }
-                g_CurrentEntity->velocityY = -g_CurrentEntity->velocityX;
-                g_CurrentEntity->velocityX = 0;
-            }
-        } else {
-            bits_67 = 0x80;
-            g_CurrentEntity->posX.val -= g_CurrentEntity->velocityX;
-            if (g_CurrentEntity->velocityX > 0) {
-                bits_01 = 3;
-            } else {
-                bits_01 = 2;
-                g_CurrentEntity->velocityX = -g_CurrentEntity->velocityX;
-            }
-            g_CurrentEntity->velocityY = g_CurrentEntity->velocityX;
-            g_CurrentEntity->velocityX = 0;
-        }
-        break;
-
-    case 1:
-        g_CurrentEntity->posY.i.hi -= 3;
-        g_api.CheckCollision(g_CurrentEntity->posX.i.hi,
-                             g_CurrentEntity->posY.i.hi, &collider, 0);
-        if (collider.effects != 0) {
-            collEff = collider.effects;
-            g_CurrentEntity->posY.i.hi += collider.unk20;
-            g_api.CheckCollision(
-                g_CurrentEntity->posX.i.hi,
-                (s16)(g_CurrentEntity->posY.i.hi + 4), &collider, 0);
-            if (collider.effects & EFFECT_UNK_0002) {
-                bits_67 = 0x40;
-                if (g_CurrentEntity->velocityX > 0) {
-                    bits_01 = 2;
-                } else {
-                    bits_01 = 3;
-                    g_CurrentEntity->velocityX = -g_CurrentEntity->velocityX;
-                }
-                g_CurrentEntity->velocityY = g_CurrentEntity->velocityX;
-                g_CurrentEntity->velocityX = 0;
-            }
-        } else {
-            bits_67 = 0x80;
-            g_CurrentEntity->posX.val -= g_CurrentEntity->velocityX;
-            if (g_CurrentEntity->velocityX > 0) {
-                bits_01 = 3;
-            } else {
-                bits_01 = 2;
-                g_CurrentEntity->velocityX = -g_CurrentEntity->velocityX;
-            }
-            g_CurrentEntity->velocityY = -g_CurrentEntity->velocityX;
-            g_CurrentEntity->velocityX = 0;
-        }
-        break;
-
-    case 2:
-        g_CurrentEntity->posX.i.hi += 3;
-        g_api.CheckCollision(g_CurrentEntity->posX.i.hi,
-                             g_CurrentEntity->posY.i.hi, &collider, 0);
-        if (collider.effects != 0) {
-            collEff = collider.effects;
-            g_CurrentEntity->posX.i.hi += collider.unk14;
-            g_api.CheckCollision((s16)(g_CurrentEntity->posX.i.hi - 4),
-                                 g_CurrentEntity->posY.i.hi, &collider, 0);
-            if (collider.effects & EFFECT_SOLID) {
-                bits_67 = 0x40;
-                if (g_CurrentEntity->velocityY > 0) {
-                    bits_01 = 0;
-                } else {
-                    bits_01 = 1;
-                    g_CurrentEntity->velocityY = -g_CurrentEntity->velocityY;
-                }
-                g_CurrentEntity->velocityX = -g_CurrentEntity->velocityY;
-                g_CurrentEntity->velocityY = 0;
-            }
-        } else {
-            bits_67 = 0x80;
-            g_CurrentEntity->posY.val -= g_CurrentEntity->velocityY;
-            if (g_CurrentEntity->velocityY > 0) {
-                bits_01 = 1;
-            } else {
-                bits_01 = 0;
-                g_CurrentEntity->velocityY = -g_CurrentEntity->velocityY;
-            }
-            g_CurrentEntity->velocityX = g_CurrentEntity->velocityY;
-            g_CurrentEntity->velocityY = 0;
-        }
-        break;
-
-    case 3:
-        g_CurrentEntity->posX.i.hi -= 3;
-        g_api.CheckCollision(g_CurrentEntity->posX.i.hi,
-                             g_CurrentEntity->posY.i.hi, &collider, 0);
-        if (collider.effects != 0) {
-            collEff = collider.effects;
-            g_CurrentEntity->posX.i.hi += collider.unk1C;
-            g_api.CheckCollision((s16)(g_CurrentEntity->posX.i.hi + 4),
-                                 g_CurrentEntity->posY.i.hi, &collider, 0);
-            if (collider.effects & EFFECT_SOLID) {
-                bits_67 = 0x40;
-                if (g_CurrentEntity->velocityY > 0) {
-                    bits_01 = 0;
-                } else {
-                    bits_01 = 1;
-                    g_CurrentEntity->velocityY = -g_CurrentEntity->velocityY;
-                }
-                g_CurrentEntity->velocityX = g_CurrentEntity->velocityY;
-                g_CurrentEntity->velocityY = 0;
-            }
-        } else {
-            bits_67 = 0x80;
-            g_CurrentEntity->posY.val -= g_CurrentEntity->velocityY;
-            if (g_CurrentEntity->velocityY > 0) {
-                bits_01 = 1;
-            } else {
-                bits_01 = 0;
-                g_CurrentEntity->velocityY = -g_CurrentEntity->velocityY;
-            }
-            g_CurrentEntity->velocityX = -g_CurrentEntity->velocityY;
-            g_CurrentEntity->velocityY = 0;
-        }
-    }
-
-    if (collEff & EFFECT_UNK_8000) {
-        bits_23 = 4;
-    }
-    if (collEff & EFFECT_UNK_1000) {
-        bits_23 = 8;
-    }
-    if (collEff & EFFECT_UNK_2000) {
-        bits_23 = 0xC;
-    }
-    if (collEff & EFFECT_UNK_0800) {
-        bits_45 = 0x20;
-    }
-    if (collEff & EFFECT_UNK_4000) {
-        bits_45 = 0x10;
-    }
-    bits_01 = (bits_45 + (bits_23 + (bits_67 + bits_01)));
-    return bits_01;
-}
+#include "unk_collision_func4.h"
 
 #include "entity_intense_explosion.h"
 
-u8 D_8018104C[] = {
+u8 g_UnkEntityAnimData[] = {
     2, 1, 2, 2, 2, 3, 2, 4, 2, 5, 4, 6, -1,
 };
-void func_801903C8(Entity* self) {
-    if (!self->step) {
-        InitializeEntity(g_InitializeEntityData0);
-        self->unk6C = 0xF0;
-        self->rotX = 0x01A0;
-        self->rotY = 0x01A0;
-        self->animSet = ANIMSET_DRA(8);
-        self->animCurFrame = 1;
-        self->zPriority += 16;
 
-        if (self->params) {
-            self->palette = self->params;
-        } else {
-            self->palette = PAL_OVL(0x160);
-        }
+#include "initialize_unk_entity.h"
 
-        self->step++;
-    } else {
-        MoveEntity();
-        if (!AnimateEntity(D_8018104C, self)) {
-            DestroyEntity(self);
-        }
-    }
-}
+#include "make_entity_from_id.h"
 
-extern PfnEntityUpdate PfnEntityUpdates[];
-void func_80190494(u16 entityId, Entity* src, Entity* dst) {
-    DestroyEntity(dst);
-    dst->entityId = entityId;
-    dst->pfnUpdate = PfnEntityUpdates[entityId - 1];
-    dst->posX.i.hi = src->posX.i.hi;
-    dst->posY.i.hi = src->posY.i.hi;
-    dst->unk5A = src->unk5A;
-    dst->zPriority = src->zPriority;
-    dst->animSet = src->animSet;
-    dst->flags = FLAG_UNK_2000 | FLAG_UNK_01000000 | FLAG_UNK_04000000 |
-                 FLAG_UNK_08000000 | FLAG_DESTROY_IF_BARELY_OUT_OF_CAMERA |
-                 FLAG_DESTROY_IF_OUT_OF_CAMERA;
-
-    if (src->palette & PAL_OVL_FLAG) {
-        dst->palette = src->hitEffect;
-    } else {
-        dst->palette = src->palette;
-    }
-}
-
-void func_8019055C(void) {
-    s32 temp_s3;
-    s8 temp_s4;
-    Entity* entity;
-    s32 i;
-
-    temp_s4 = Random() & 3;
-    temp_s3 = ((Random() & 0xF) << 8) - 0x800;
-
-    for (i = 0; i < 6; i++) {
-        entity = AllocEntity(&g_Entities[224], &g_Entities[256]);
-        if (entity != NULL) {
-            CreateEntityFromEntity(E_EXPLOSION, g_CurrentEntity, entity);
-            entity->ext.generic.unk84.U8.unk1 = 6 - i;
-            entity->ext.generic.unk80.modeS16.unk0 = temp_s3;
-            entity->ext.generic.unk84.U8.unk0 = temp_s4;
-        }
-    }
-}
+#include "make_explosions.h"
 
 extern u8 g_bigRedFireballAnim[];
 u16 g_UnkRecursPrimVecOrder[] = {
diff --git a/src/st/initialize_unk_entity.h b/src/st/initialize_unk_entity.h
new file mode 100644
index 000000000..8f6a368f3
--- /dev/null
+++ b/src/st/initialize_unk_entity.h
@@ -0,0 +1,25 @@
+extern u8 g_UnkEntityAnimData[];
+void InitializeUnkEntity(Entity* self) {
+    if (!self->step) {
+        InitializeEntity(g_InitializeEntityData0);
+        self->unk6C = 0xF0;
+        self->rotX = 0x01A0;
+        self->rotY = 0x01A0;
+        self->animSet = ANIMSET_DRA(8);
+        self->animCurFrame = 1;
+        self->zPriority += 16;
+
+        if (self->params) {
+            self->palette = self->params;
+        } else {
+            self->palette = PAL_OVL(0x160);
+        }
+
+        self->step++;
+    } else {
+        MoveEntity();
+        if (!AnimateEntity(g_UnkEntityAnimData, self)) {
+            DestroyEntity(self);
+        }
+    }
+}
diff --git a/src/st/mad/15520.c b/src/st/mad/15520.c
index 070a88092..b090bb5fe 100644
--- a/src/st/mad/15520.c
+++ b/src/st/mad/15520.c
@@ -312,45 +312,9 @@ void func_801966B0(u16* sensors) {
     }
 }
 
-void func_8019686C(u16 entityId, Entity* src, Entity* dst) {
-    DestroyEntity(dst);
-    dst->entityId = entityId;
-    dst->pfnUpdate = PfnEntityUpdates[entityId - 1];
-    dst->posX.i.hi = src->posX.i.hi;
-    dst->posY.i.hi = src->posY.i.hi;
-    dst->unk5A = src->unk5A;
-    dst->zPriority = src->zPriority;
-    dst->animSet = src->animSet;
-    dst->flags = FLAG_UNK_2000 | FLAG_UNK_01000000 | FLAG_UNK_04000000 |
-                 FLAG_UNK_08000000 | FLAG_DESTROY_IF_BARELY_OUT_OF_CAMERA |
-                 FLAG_DESTROY_IF_OUT_OF_CAMERA;
+#include "../make_entity_from_id.h"
 
-    if (src->palette & 0x8000) {
-        dst->palette = src->hitEffect;
-    } else {
-        dst->palette = src->palette;
-    }
-}
-
-void func_80196934(void) {
-    Entity* entity;
-    s16 temp_s3;
-    s32 i;
-    u8 temp_s4;
-
-    temp_s4 = Random() & 3;
-    temp_s3 = ((Random() & 0xF) << 8) - 0x800;
-
-    for (i = 0; i < 6; i++) {
-        entity = AllocEntity(&g_Entities[224], &g_Entities[256]);
-        if (entity != NULL) {
-            CreateEntityFromEntity(2, g_CurrentEntity, entity);
-            entity->ext.generic.unk84.U8.unk1 = 6 - i;
-            entity->ext.generic.unk80.modeS16.unk0 = temp_s3;
-            entity->ext.generic.unk84.U8.unk0 = temp_s4;
-        }
-    }
-}
+#include "../make_explosions.h"
 
 #include "../entity_big_red_fireball.h"
 
diff --git a/src/st/make_entity_from_id.h b/src/st/make_entity_from_id.h
new file mode 100644
index 000000000..d2688fd32
--- /dev/null
+++ b/src/st/make_entity_from_id.h
@@ -0,0 +1,20 @@
+extern PfnEntityUpdate PfnEntityUpdates[];
+void MakeEntityFromId(u16 entityId, Entity* src, Entity* dst) {
+    DestroyEntity(dst);
+    dst->entityId = entityId;
+    dst->pfnUpdate = PfnEntityUpdates[entityId - 1];
+    dst->posX.i.hi = src->posX.i.hi;
+    dst->posY.i.hi = src->posY.i.hi;
+    dst->unk5A = src->unk5A;
+    dst->zPriority = src->zPriority;
+    dst->animSet = src->animSet;
+    dst->flags = FLAG_UNK_2000 | FLAG_UNK_01000000 | FLAG_UNK_04000000 |
+                 FLAG_UNK_08000000 | FLAG_DESTROY_IF_BARELY_OUT_OF_CAMERA |
+                 FLAG_DESTROY_IF_OUT_OF_CAMERA;
+
+    if (src->palette & PAL_OVL_FLAG) {
+        dst->palette = src->hitEffect;
+    } else {
+        dst->palette = src->palette;
+    }
+}
diff --git a/src/st/make_explosions.h b/src/st/make_explosions.h
new file mode 100644
index 000000000..22f958904
--- /dev/null
+++ b/src/st/make_explosions.h
@@ -0,0 +1,19 @@
+void MakeExplosions(void) {
+    s32 temp_s3;
+    s8 temp_s4;
+    Entity* entity;
+    s32 i;
+
+    temp_s4 = Random() & 3;
+    temp_s3 = ((Random() & 0xF) << 8) - 0x800;
+
+    for (i = 0; i < 6; i++) {
+        entity = AllocEntity(&g_Entities[224], &g_Entities[256]);
+        if (entity != NULL) {
+            CreateEntityFromEntity(E_EXPLOSION, g_CurrentEntity, entity);
+            entity->ext.generic.unk84.U8.unk1 = 6 - i;
+            entity->ext.generic.unk80.modeS16.unk0 = temp_s3;
+            entity->ext.generic.unk84.U8.unk0 = temp_s4;
+        }
+    }
+}
diff --git a/src/st/no3/48A84.c b/src/st/no3/48A84.c
index d7bb4c412..36bbe51c3 100644
--- a/src/st/no3/48A84.c
+++ b/src/st/no3/48A84.c
@@ -14,264 +14,17 @@
 
 #include "../entity_olrox_drool.h"
 
-bool func_801C92B0(Point16* unk) {
-    Collider collider;
+#include "../unk_collision_func5.h"
 
-    FallEntity();
-    g_CurrentEntity->posX.val += g_CurrentEntity->velocityX;
-    g_CurrentEntity->posY.val += g_CurrentEntity->velocityY;
-
-    if (g_CurrentEntity->velocityY >= 0) {
-        s16 posX = g_CurrentEntity->posX.i.hi;
-        s16 posY = g_CurrentEntity->posY.i.hi;
-        posX += unk->x;
-        posY += unk->y;
-        g_api.CheckCollision(posX, posY, &collider, 0);
-        if (collider.effects & EFFECT_SOLID) {
-            g_CurrentEntity->posY.i.hi += collider.unk18;
-            g_CurrentEntity->velocityY = -g_CurrentEntity->velocityY / 2;
-            if (g_CurrentEntity->velocityY > FIX(-1.0)) {
-                return true;
-            }
-        }
-    }
-    return false;
-}
-
-u8 func_801C93AC(s32 arg0) {
-    Collider collider;
-    u32 bits_67;
-    u32 bits_45;
-    u32 bits_23;
-    u8 bits_01;
-    u16 collEff;
-
-    MoveEntity();
-    bits_67 = 0;
-    bits_23 = 0;
-    bits_45 = 0;
-    bits_01 = arg0 & 3;
-    collEff = 0;
-    switch (bits_01) {
-    case 0:
-        g_CurrentEntity->posY.i.hi += 3;
-        g_api.CheckCollision(g_CurrentEntity->posX.i.hi,
-                             g_CurrentEntity->posY.i.hi, &collider, 0);
-        if (collider.effects != 0) {
-            collEff = collider.effects;
-            g_CurrentEntity->posY.i.hi += collider.unk18;
-            g_api.CheckCollision(
-                g_CurrentEntity->posX.i.hi,
-                (s16)(g_CurrentEntity->posY.i.hi - 4), &collider, 0);
-            if (collider.effects & EFFECT_UNK_0002) {
-                bits_67 = 0x40;
-                if (g_CurrentEntity->velocityX > 0) {
-                    bits_01 = 2;
-                } else {
-                    bits_01 = 3;
-                    g_CurrentEntity->velocityX = -g_CurrentEntity->velocityX;
-                }
-                g_CurrentEntity->velocityY = -g_CurrentEntity->velocityX;
-                g_CurrentEntity->velocityX = 0;
-            }
-        } else {
-            bits_67 = 0x80;
-            g_CurrentEntity->posX.val -= g_CurrentEntity->velocityX;
-            if (g_CurrentEntity->velocityX > 0) {
-                bits_01 = 3;
-            } else {
-                bits_01 = 2;
-                g_CurrentEntity->velocityX = -g_CurrentEntity->velocityX;
-            }
-            g_CurrentEntity->velocityY = g_CurrentEntity->velocityX;
-            g_CurrentEntity->velocityX = 0;
-        }
-        break;
-
-    case 1:
-        g_CurrentEntity->posY.i.hi -= 3;
-        g_api.CheckCollision(g_CurrentEntity->posX.i.hi,
-                             g_CurrentEntity->posY.i.hi, &collider, 0);
-        if (collider.effects != 0) {
-            collEff = collider.effects;
-            g_CurrentEntity->posY.i.hi += collider.unk20;
-            g_api.CheckCollision(
-                g_CurrentEntity->posX.i.hi,
-                (s16)(g_CurrentEntity->posY.i.hi + 4), &collider, 0);
-            if (collider.effects & EFFECT_UNK_0002) {
-                bits_67 = 0x40;
-                if (g_CurrentEntity->velocityX > 0) {
-                    bits_01 = 2;
-                } else {
-                    bits_01 = 3;
-                    g_CurrentEntity->velocityX = -g_CurrentEntity->velocityX;
-                }
-                g_CurrentEntity->velocityY = g_CurrentEntity->velocityX;
-                g_CurrentEntity->velocityX = 0;
-            }
-        } else {
-            bits_67 = 0x80;
-            g_CurrentEntity->posX.val -= g_CurrentEntity->velocityX;
-            if (g_CurrentEntity->velocityX > 0) {
-                bits_01 = 3;
-            } else {
-                bits_01 = 2;
-                g_CurrentEntity->velocityX = -g_CurrentEntity->velocityX;
-            }
-            g_CurrentEntity->velocityY = -g_CurrentEntity->velocityX;
-            g_CurrentEntity->velocityX = 0;
-        }
-        break;
-
-    case 2:
-        g_CurrentEntity->posX.i.hi += 3;
-        g_api.CheckCollision(g_CurrentEntity->posX.i.hi,
-                             g_CurrentEntity->posY.i.hi, &collider, 0);
-        if (collider.effects != 0) {
-            collEff = collider.effects;
-            g_CurrentEntity->posX.i.hi += collider.unk14;
-            g_api.CheckCollision((s16)(g_CurrentEntity->posX.i.hi - 4),
-                                 g_CurrentEntity->posY.i.hi, &collider, 0);
-            if (collider.effects & EFFECT_SOLID) {
-                bits_67 = 0x40;
-                if (g_CurrentEntity->velocityY > 0) {
-                    bits_01 = 0;
-                } else {
-                    bits_01 = 1;
-                    g_CurrentEntity->velocityY = -g_CurrentEntity->velocityY;
-                }
-                g_CurrentEntity->velocityX = -g_CurrentEntity->velocityY;
-                g_CurrentEntity->velocityY = 0;
-            }
-        } else {
-            bits_67 = 0x80;
-            g_CurrentEntity->posY.val -= g_CurrentEntity->velocityY;
-            if (g_CurrentEntity->velocityY > 0) {
-                bits_01 = 1;
-            } else {
-                bits_01 = 0;
-                g_CurrentEntity->velocityY = -g_CurrentEntity->velocityY;
-            }
-            g_CurrentEntity->velocityX = g_CurrentEntity->velocityY;
-            g_CurrentEntity->velocityY = 0;
-        }
-        break;
-
-    case 3:
-        g_CurrentEntity->posX.i.hi -= 3;
-        g_api.CheckCollision(g_CurrentEntity->posX.i.hi,
-                             g_CurrentEntity->posY.i.hi, &collider, 0);
-        if (collider.effects != 0) {
-            collEff = collider.effects;
-            g_CurrentEntity->posX.i.hi += collider.unk1C;
-            g_api.CheckCollision((s16)(g_CurrentEntity->posX.i.hi + 4),
-                                 g_CurrentEntity->posY.i.hi, &collider, 0);
-            if (collider.effects & EFFECT_SOLID) {
-                bits_67 = 0x40;
-                if (g_CurrentEntity->velocityY > 0) {
-                    bits_01 = 0;
-                } else {
-                    bits_01 = 1;
-                    g_CurrentEntity->velocityY = -g_CurrentEntity->velocityY;
-                }
-                g_CurrentEntity->velocityX = g_CurrentEntity->velocityY;
-                g_CurrentEntity->velocityY = 0;
-            }
-        } else {
-            bits_67 = 0x80;
-            g_CurrentEntity->posY.val -= g_CurrentEntity->velocityY;
-            if (g_CurrentEntity->velocityY > 0) {
-                bits_01 = 1;
-            } else {
-                bits_01 = 0;
-                g_CurrentEntity->velocityY = -g_CurrentEntity->velocityY;
-            }
-            g_CurrentEntity->velocityX = -g_CurrentEntity->velocityY;
-            g_CurrentEntity->velocityY = 0;
-        }
-    }
-
-    if (collEff & EFFECT_UNK_8000) {
-        bits_23 = 4;
-    }
-    if (collEff & EFFECT_UNK_1000) {
-        bits_23 = 8;
-    }
-    if (collEff & EFFECT_UNK_2000) {
-        bits_23 = 0xC;
-    }
-    if (collEff & EFFECT_UNK_0800) {
-        bits_45 = 0x20;
-    }
-    if (collEff & EFFECT_UNK_4000) {
-        bits_45 = 0x10;
-    }
-    bits_01 = (bits_45 + (bits_23 + (bits_67 + bits_01)));
-    return bits_01;
-}
+#include "../unk_collision_func4.h"
 
 #include "../entity_intense_explosion.h"
 
-void func_801903C8(Entity* entity) {
-    if (entity->step == 0) {
-        InitializeEntity(g_InitializeEntityData0);
-        entity->unk6C = 0xF0;
-        entity->rotX = 0x01A0;
-        entity->rotY = 0x01A0;
-        entity->animSet = ANIMSET_DRA(8);
-        entity->animCurFrame = 1;
-        entity->zPriority += 16;
-        if (entity->params) {
-            entity->palette = entity->params;
-        } else {
-            entity->palette = 0x8160;
-        }
+#include "../initialize_unk_entity.h"
 
-        entity->step++;
-    } else {
-        MoveEntity();
-        if (!AnimateEntity(D_8018267C, entity)) {
-            DestroyEntity(entity);
-        }
-    }
-}
+#include "../make_entity_from_id.h"
 
-void func_801C9AF8(u16 entityId, Entity* src, Entity* dst) {
-    DestroyEntity(dst);
-    dst->entityId = entityId;
-    dst->pfnUpdate = PfnEntityUpdates[entityId - 1];
-    dst->posX.i.hi = src->posX.i.hi;
-    dst->posY.i.hi = src->posY.i.hi;
-    dst->unk5A = src->unk5A;
-    dst->zPriority = src->zPriority;
-    dst->animSet = src->animSet;
-    dst->flags = FLAG_UNK_2000 | FLAG_UNK_01000000 | FLAG_UNK_04000000 |
-                 FLAG_UNK_08000000 | FLAG_DESTROY_IF_BARELY_OUT_OF_CAMERA |
-                 FLAG_DESTROY_IF_OUT_OF_CAMERA;
-
-    if (src->palette & 0x8000) {
-        dst->palette = src->hitEffect;
-    } else {
-        dst->palette = src->palette;
-    }
-}
-
-void func_801C9BC0(void) {
-    Entity* entity;
-    s8 temp_s4 = Random() & 3;
-    s16 temp_s3 = ((Random() & 0xF) << 8) - 0x800;
-    s32 i;
-
-    for (i = 0; i < 6; i++) {
-        entity = AllocEntity(&g_Entities[224], &g_Entities[256]);
-        if (entity != NULL) {
-            CreateEntityFromEntity(2, g_CurrentEntity, entity);
-            entity->ext.generic.unk84.U8.unk1 = 6 - i;
-            entity->ext.generic.unk80.modeS16.unk0 = temp_s3;
-            entity->ext.generic.unk84.U8.unk0 = temp_s4;
-        }
-    }
-}
+#include "../make_explosions.h"
 
 #include "../entity_big_red_fireball.h"
 
diff --git a/src/st/no3/53F38.c b/src/st/no3/53F38.c
index c7bd0fa55..d1880eb6a 100644
--- a/src/st/no3/53F38.c
+++ b/src/st/no3/53F38.c
@@ -289,7 +289,7 @@ void EntityMerman(Entity* self) {
             if (collider.effects & EFFECT_SOLID) {
                 self->velocityX = 0;
             }
-            func_801C92B0(&D_80183A5C);
+            UnkCollisionFunc5(&D_80183A5C);
             if (self->facingLeft != 0) {
                 self->velocityX -= FIX(0.03125);
             } else {
diff --git a/src/st/np3/48238.c b/src/st/np3/48238.c
index d38e16373..ddb8b17dc 100644
--- a/src/st/np3/48238.c
+++ b/src/st/np3/48238.c
@@ -280,7 +280,7 @@ void EntityMerman(Entity* self) {
             if (collider.effects & EFFECT_SOLID) {
                 self->velocityX = 0;
             }
-            func_8018FC4C(&D_8018236C);
+            UnkCollisionFunc5(&D_8018236C);
             if (self->facingLeft != 0) {
                 self->velocityX -= FIX(0.03125);
             } else {
diff --git a/src/st/np3/e_misc.c b/src/st/np3/e_misc.c
index 5d1c84163..f76f360d7 100644
--- a/src/st/np3/e_misc.c
+++ b/src/st/np3/e_misc.c
@@ -53,268 +53,17 @@ void EntityHeartDrop(Entity* self) {
 
 #include "../entity_olrox_drool.h"
 
-bool func_8018FC4C(Point16* unk) {
-    Collider collider;
+#include "../unk_collision_func5.h"
 
-    FallEntity();
-    g_CurrentEntity->posX.val += g_CurrentEntity->velocityX;
-    g_CurrentEntity->posY.val += g_CurrentEntity->velocityY;
-
-    if (g_CurrentEntity->velocityY >= 0) {
-        s16 posX = g_CurrentEntity->posX.i.hi;
-        s16 posY = g_CurrentEntity->posY.i.hi;
-        posX += unk->x;
-        posY += unk->y;
-        g_api.CheckCollision(posX, posY, &collider, 0);
-        if (collider.effects & EFFECT_SOLID) {
-            g_CurrentEntity->posY.i.hi += collider.unk18;
-            g_CurrentEntity->velocityY = -g_CurrentEntity->velocityY / 2;
-            if (g_CurrentEntity->velocityY > FIX(-1.0)) {
-                return true;
-            }
-        }
-    }
-    return false;
-}
-
-u8 func_8018FD48(s32 arg0) {
-    Collider collider;
-    u32 bits_67;
-    u32 bits_45;
-    u32 bits_23;
-    u8 bits_01;
-    u16 collEff;
-
-    MoveEntity();
-    bits_67 = 0;
-    bits_23 = 0;
-    bits_45 = 0;
-    bits_01 = arg0 & 3;
-    collEff = 0;
-    switch (bits_01) {
-    case 0:
-        g_CurrentEntity->posY.i.hi += 3;
-        g_api.CheckCollision(g_CurrentEntity->posX.i.hi,
-                             g_CurrentEntity->posY.i.hi, &collider, 0);
-        if (collider.effects != 0) {
-            collEff = collider.effects;
-            g_CurrentEntity->posY.i.hi += collider.unk18;
-            g_api.CheckCollision(
-                g_CurrentEntity->posX.i.hi,
-                (s16)(g_CurrentEntity->posY.i.hi - 4), &collider, 0);
-            if (collider.effects & EFFECT_UNK_0002) {
-                bits_67 = 0x40;
-                if (g_CurrentEntity->velocityX > 0) {
-                    bits_01 = 2;
-                } else {
-                    bits_01 = 3;
-                    g_CurrentEntity->velocityX = -g_CurrentEntity->velocityX;
-                }
-                g_CurrentEntity->velocityY = -g_CurrentEntity->velocityX;
-                g_CurrentEntity->velocityX = 0;
-            }
-        } else {
-            bits_67 = 0x80;
-            g_CurrentEntity->posX.val -= g_CurrentEntity->velocityX;
-            if (g_CurrentEntity->velocityX > 0) {
-                bits_01 = 3;
-            } else {
-                bits_01 = 2;
-                g_CurrentEntity->velocityX = -g_CurrentEntity->velocityX;
-            }
-            g_CurrentEntity->velocityY = g_CurrentEntity->velocityX;
-            g_CurrentEntity->velocityX = 0;
-        }
-        break;
-
-    case 1:
-        g_CurrentEntity->posY.i.hi -= 3;
-        g_api.CheckCollision(g_CurrentEntity->posX.i.hi,
-                             g_CurrentEntity->posY.i.hi, &collider, 0);
-        if (collider.effects != 0) {
-            collEff = collider.effects;
-            g_CurrentEntity->posY.i.hi += collider.unk20;
-            g_api.CheckCollision(
-                g_CurrentEntity->posX.i.hi,
-                (s16)(g_CurrentEntity->posY.i.hi + 4), &collider, 0);
-            if (collider.effects & EFFECT_UNK_0002) {
-                bits_67 = 0x40;
-                if (g_CurrentEntity->velocityX > 0) {
-                    bits_01 = 2;
-                } else {
-                    bits_01 = 3;
-                    g_CurrentEntity->velocityX = -g_CurrentEntity->velocityX;
-                }
-                g_CurrentEntity->velocityY = g_CurrentEntity->velocityX;
-                g_CurrentEntity->velocityX = 0;
-            }
-        } else {
-            bits_67 = 0x80;
-            g_CurrentEntity->posX.val -= g_CurrentEntity->velocityX;
-            if (g_CurrentEntity->velocityX > 0) {
-                bits_01 = 3;
-            } else {
-                bits_01 = 2;
-                g_CurrentEntity->velocityX = -g_CurrentEntity->velocityX;
-            }
-            g_CurrentEntity->velocityY = -g_CurrentEntity->velocityX;
-            g_CurrentEntity->velocityX = 0;
-        }
-        break;
-
-    case 2:
-        g_CurrentEntity->posX.i.hi += 3;
-        g_api.CheckCollision(g_CurrentEntity->posX.i.hi,
-                             g_CurrentEntity->posY.i.hi, &collider, 0);
-        if (collider.effects != 0) {
-            collEff = collider.effects;
-            g_CurrentEntity->posX.i.hi += collider.unk14;
-            g_api.CheckCollision((s16)(g_CurrentEntity->posX.i.hi - 4),
-                                 g_CurrentEntity->posY.i.hi, &collider, 0);
-            if (collider.effects & EFFECT_SOLID) {
-                bits_67 = 0x40;
-                if (g_CurrentEntity->velocityY > 0) {
-                    bits_01 = 0;
-                } else {
-                    bits_01 = 1;
-                    g_CurrentEntity->velocityY = -g_CurrentEntity->velocityY;
-                }
-                g_CurrentEntity->velocityX = -g_CurrentEntity->velocityY;
-                g_CurrentEntity->velocityY = 0;
-            }
-        } else {
-            bits_67 = 0x80;
-            g_CurrentEntity->posY.val -= g_CurrentEntity->velocityY;
-            if (g_CurrentEntity->velocityY > 0) {
-                bits_01 = 1;
-            } else {
-                bits_01 = 0;
-                g_CurrentEntity->velocityY = -g_CurrentEntity->velocityY;
-            }
-            g_CurrentEntity->velocityX = g_CurrentEntity->velocityY;
-            g_CurrentEntity->velocityY = 0;
-        }
-        break;
-
-    case 3:
-        g_CurrentEntity->posX.i.hi -= 3;
-        g_api.CheckCollision(g_CurrentEntity->posX.i.hi,
-                             g_CurrentEntity->posY.i.hi, &collider, 0);
-        if (collider.effects != 0) {
-            collEff = collider.effects;
-            g_CurrentEntity->posX.i.hi += collider.unk1C;
-            g_api.CheckCollision((s16)(g_CurrentEntity->posX.i.hi + 4),
-                                 g_CurrentEntity->posY.i.hi, &collider, 0);
-            if (collider.effects & EFFECT_SOLID) {
-                bits_67 = 0x40;
-                if (g_CurrentEntity->velocityY > 0) {
-                    bits_01 = 0;
-                } else {
-                    bits_01 = 1;
-                    g_CurrentEntity->velocityY = -g_CurrentEntity->velocityY;
-                }
-                g_CurrentEntity->velocityX = g_CurrentEntity->velocityY;
-                g_CurrentEntity->velocityY = 0;
-            }
-        } else {
-            bits_67 = 0x80;
-            g_CurrentEntity->posY.val -= g_CurrentEntity->velocityY;
-            if (g_CurrentEntity->velocityY > 0) {
-                bits_01 = 1;
-            } else {
-                bits_01 = 0;
-                g_CurrentEntity->velocityY = -g_CurrentEntity->velocityY;
-            }
-            g_CurrentEntity->velocityX = -g_CurrentEntity->velocityY;
-            g_CurrentEntity->velocityY = 0;
-        }
-    }
-
-    if (collEff & EFFECT_UNK_8000) {
-        bits_23 = 4;
-    }
-    if (collEff & EFFECT_UNK_1000) {
-        bits_23 = 8;
-    }
-    if (collEff & EFFECT_UNK_2000) {
-        bits_23 = 0xC;
-    }
-    if (collEff & EFFECT_UNK_0800) {
-        bits_45 = 0x20;
-    }
-    if (collEff & EFFECT_UNK_4000) {
-        bits_45 = 0x10;
-    }
-    bits_01 = (bits_45 + (bits_23 + (bits_67 + bits_01)));
-    return bits_01;
-}
+#include "../unk_collision_func4.h"
 
 #include "../entity_intense_explosion.h"
 
-void func_801903C8(Entity* entity) {
-    if (entity->step == 0) {
-        InitializeEntity(g_InitializeEntityData0);
-        entity->unk6C = 0xF0;
-        entity->rotX = 0x1A0;
-        entity->rotY = 0x1A0;
-        entity->animSet = ANIMSET_DRA(8);
-        entity->animCurFrame = 1;
-        entity->zPriority += 0x10;
+#include "../initialize_unk_entity.h"
 
-        if (entity->params != 0) {
-            entity->palette = entity->params;
-        } else {
-            entity->palette = 0x8160;
-        }
+#include "../make_entity_from_id.h"
 
-        entity->step++;
-    } else {
-        MoveEntity();
-        if (!AnimateEntity(D_80182008, entity)) {
-            DestroyEntity(entity);
-        }
-    }
-}
-
-void func_80190494(u16 entityId, Entity* src, Entity* dst) {
-    DestroyEntity(dst);
-    dst->entityId = entityId;
-    dst->pfnUpdate = PfnEntityUpdates[entityId - 1];
-    dst->posX.i.hi = src->posX.i.hi;
-    dst->posY.i.hi = src->posY.i.hi;
-    dst->unk5A = src->unk5A;
-    dst->zPriority = src->zPriority;
-    dst->animSet = src->animSet;
-    dst->flags = FLAG_UNK_2000 | FLAG_UNK_01000000 | FLAG_UNK_04000000 |
-                 FLAG_UNK_08000000 | FLAG_DESTROY_IF_BARELY_OUT_OF_CAMERA |
-                 FLAG_DESTROY_IF_OUT_OF_CAMERA;
-
-    if (src->palette & 0x8000) {
-        dst->palette = src->hitEffect;
-    } else {
-        dst->palette = src->palette;
-    }
-}
-
-void func_8019055C(void) {
-    s32 temp_s3;
-    s8 temp_s4;
-    Entity* entity;
-    s32 i;
-
-    temp_s4 = Random() & 3;
-    temp_s3 = ((Random() & 0xF) << 8) - 0x800;
-
-    for (i = 0; i < 6; i++) {
-        entity = AllocEntity(&g_Entities[224], &g_Entities[256]);
-        if (entity != NULL) {
-            CreateEntityFromEntity(E_EXPLOSION, g_CurrentEntity, entity);
-            entity->ext.generic.unk84.U8.unk1 = 6 - i;
-            entity->ext.generic.unk80.modeS16.unk0 = temp_s3;
-            entity->ext.generic.unk84.U8.unk0 = temp_s4;
-        }
-    }
-}
+#include "../make_explosions.h"
 
 #include "../entity_big_red_fireball.h"
 
diff --git a/src/st/nz0/4070C.c b/src/st/nz0/4070C.c
index 08c65dbe5..16ef70822 100644
--- a/src/st/nz0/4070C.c
+++ b/src/st/nz0/4070C.c
@@ -14,268 +14,17 @@
 
 #include "../entity_olrox_drool.h"
 
-bool func_801C0F38(Point16* unk) {
-    Collider collider;
+#include "../unk_collision_func5.h"
 
-    FallEntity();
-    g_CurrentEntity->posX.val += g_CurrentEntity->velocityX;
-    g_CurrentEntity->posY.val += g_CurrentEntity->velocityY;
-
-    if (g_CurrentEntity->velocityY >= 0) {
-        s16 posX = g_CurrentEntity->posX.i.hi;
-        s16 posY = g_CurrentEntity->posY.i.hi;
-        posX += unk->x;
-        posY += unk->y;
-        g_api.CheckCollision(posX, posY, &collider, 0);
-        if (collider.effects & EFFECT_SOLID) {
-            g_CurrentEntity->posY.i.hi += collider.unk18;
-            g_CurrentEntity->velocityY = -g_CurrentEntity->velocityY / 2;
-            if (g_CurrentEntity->velocityY > FIX(-1.0)) {
-                return true;
-            }
-        }
-    }
-    return false;
-}
-
-u8 func_801C1034(s32 arg0) {
-    Collider collider;
-    u32 bits_67;
-    u32 bits_45;
-    u32 bits_23;
-    u8 bits_01;
-    u16 collEff;
-
-    MoveEntity();
-    bits_67 = 0;
-    bits_23 = 0;
-    bits_45 = 0;
-    bits_01 = arg0 & 3;
-    collEff = 0;
-    switch (bits_01) {
-    case 0:
-        g_CurrentEntity->posY.i.hi += 3;
-        g_api.CheckCollision(g_CurrentEntity->posX.i.hi,
-                             g_CurrentEntity->posY.i.hi, &collider, 0);
-        if (collider.effects != 0) {
-            collEff = collider.effects;
-            g_CurrentEntity->posY.i.hi += collider.unk18;
-            g_api.CheckCollision(
-                g_CurrentEntity->posX.i.hi,
-                (s16)(g_CurrentEntity->posY.i.hi - 4), &collider, 0);
-            if (collider.effects & EFFECT_UNK_0002) {
-                bits_67 = 0x40;
-                if (g_CurrentEntity->velocityX > 0) {
-                    bits_01 = 2;
-                } else {
-                    bits_01 = 3;
-                    g_CurrentEntity->velocityX = -g_CurrentEntity->velocityX;
-                }
-                g_CurrentEntity->velocityY = -g_CurrentEntity->velocityX;
-                g_CurrentEntity->velocityX = 0;
-            }
-        } else {
-            bits_67 = 0x80;
-            g_CurrentEntity->posX.val -= g_CurrentEntity->velocityX;
-            if (g_CurrentEntity->velocityX > 0) {
-                bits_01 = 3;
-            } else {
-                bits_01 = 2;
-                g_CurrentEntity->velocityX = -g_CurrentEntity->velocityX;
-            }
-            g_CurrentEntity->velocityY = g_CurrentEntity->velocityX;
-            g_CurrentEntity->velocityX = 0;
-        }
-        break;
-
-    case 1:
-        g_CurrentEntity->posY.i.hi -= 3;
-        g_api.CheckCollision(g_CurrentEntity->posX.i.hi,
-                             g_CurrentEntity->posY.i.hi, &collider, 0);
-        if (collider.effects != 0) {
-            collEff = collider.effects;
-            g_CurrentEntity->posY.i.hi += collider.unk20;
-            g_api.CheckCollision(
-                g_CurrentEntity->posX.i.hi,
-                (s16)(g_CurrentEntity->posY.i.hi + 4), &collider, 0);
-            if (collider.effects & EFFECT_UNK_0002) {
-                bits_67 = 0x40;
-                if (g_CurrentEntity->velocityX > 0) {
-                    bits_01 = 2;
-                } else {
-                    bits_01 = 3;
-                    g_CurrentEntity->velocityX = -g_CurrentEntity->velocityX;
-                }
-                g_CurrentEntity->velocityY = g_CurrentEntity->velocityX;
-                g_CurrentEntity->velocityX = 0;
-            }
-        } else {
-            bits_67 = 0x80;
-            g_CurrentEntity->posX.val -= g_CurrentEntity->velocityX;
-            if (g_CurrentEntity->velocityX > 0) {
-                bits_01 = 3;
-            } else {
-                bits_01 = 2;
-                g_CurrentEntity->velocityX = -g_CurrentEntity->velocityX;
-            }
-            g_CurrentEntity->velocityY = -g_CurrentEntity->velocityX;
-            g_CurrentEntity->velocityX = 0;
-        }
-        break;
-
-    case 2:
-        g_CurrentEntity->posX.i.hi += 3;
-        g_api.CheckCollision(g_CurrentEntity->posX.i.hi,
-                             g_CurrentEntity->posY.i.hi, &collider, 0);
-        if (collider.effects != 0) {
-            collEff = collider.effects;
-            g_CurrentEntity->posX.i.hi += collider.unk14;
-            g_api.CheckCollision((s16)(g_CurrentEntity->posX.i.hi - 4),
-                                 g_CurrentEntity->posY.i.hi, &collider, 0);
-            if (collider.effects & EFFECT_SOLID) {
-                bits_67 = 0x40;
-                if (g_CurrentEntity->velocityY > 0) {
-                    bits_01 = 0;
-                } else {
-                    bits_01 = 1;
-                    g_CurrentEntity->velocityY = -g_CurrentEntity->velocityY;
-                }
-                g_CurrentEntity->velocityX = -g_CurrentEntity->velocityY;
-                g_CurrentEntity->velocityY = 0;
-            }
-        } else {
-            bits_67 = 0x80;
-            g_CurrentEntity->posY.val -= g_CurrentEntity->velocityY;
-            if (g_CurrentEntity->velocityY > 0) {
-                bits_01 = 1;
-            } else {
-                bits_01 = 0;
-                g_CurrentEntity->velocityY = -g_CurrentEntity->velocityY;
-            }
-            g_CurrentEntity->velocityX = g_CurrentEntity->velocityY;
-            g_CurrentEntity->velocityY = 0;
-        }
-        break;
-
-    case 3:
-        g_CurrentEntity->posX.i.hi -= 3;
-        g_api.CheckCollision(g_CurrentEntity->posX.i.hi,
-                             g_CurrentEntity->posY.i.hi, &collider, 0);
-        if (collider.effects != 0) {
-            collEff = collider.effects;
-            g_CurrentEntity->posX.i.hi += collider.unk1C;
-            g_api.CheckCollision((s16)(g_CurrentEntity->posX.i.hi + 4),
-                                 g_CurrentEntity->posY.i.hi, &collider, 0);
-            if (collider.effects & EFFECT_SOLID) {
-                bits_67 = 0x40;
-                if (g_CurrentEntity->velocityY > 0) {
-                    bits_01 = 0;
-                } else {
-                    bits_01 = 1;
-                    g_CurrentEntity->velocityY = -g_CurrentEntity->velocityY;
-                }
-                g_CurrentEntity->velocityX = g_CurrentEntity->velocityY;
-                g_CurrentEntity->velocityY = 0;
-            }
-        } else {
-            bits_67 = 0x80;
-            g_CurrentEntity->posY.val -= g_CurrentEntity->velocityY;
-            if (g_CurrentEntity->velocityY > 0) {
-                bits_01 = 1;
-            } else {
-                bits_01 = 0;
-                g_CurrentEntity->velocityY = -g_CurrentEntity->velocityY;
-            }
-            g_CurrentEntity->velocityX = -g_CurrentEntity->velocityY;
-            g_CurrentEntity->velocityY = 0;
-        }
-    }
-
-    if (collEff & EFFECT_UNK_8000) {
-        bits_23 = 4;
-    }
-    if (collEff & EFFECT_UNK_1000) {
-        bits_23 = 8;
-    }
-    if (collEff & EFFECT_UNK_2000) {
-        bits_23 = 0xC;
-    }
-    if (collEff & EFFECT_UNK_0800) {
-        bits_45 = 0x20;
-    }
-    if (collEff & EFFECT_UNK_4000) {
-        bits_45 = 0x10;
-    }
-    bits_01 = (bits_45 + (bits_23 + (bits_67 + bits_01)));
-    return bits_01;
-}
+#include "../unk_collision_func4.h"
 
 #include "../entity_intense_explosion.h"
 
-void func_801C16B4(Entity* entity) {
-    if (entity->step == 0) {
-        InitializeEntity(g_InitializeEntityData0);
-        entity->unk6C = 0xF0;
-        entity->rotX = 0x1A0;
-        entity->rotY = 0x1A0;
-        entity->animSet = ANIMSET_DRA(8);
-        entity->animCurFrame = 1;
-        entity->zPriority += 0x10;
+#include "../initialize_unk_entity.h"
 
-        if (entity->params != 0) {
-            entity->palette = entity->params;
-        } else {
-            entity->palette = 0x8160;
-        }
+#include "../make_entity_from_id.h"
 
-        entity->step++;
-    } else {
-        MoveEntity();
-        if (!AnimateEntity(D_80181F30, entity)) {
-            DestroyEntity(entity);
-        }
-    }
-}
-
-void func_801C1780(u16 entityId, Entity* src, Entity* dst) {
-    DestroyEntity(dst);
-    dst->entityId = entityId;
-    dst->pfnUpdate = PfnEntityUpdates[entityId - 1];
-    dst->posX.i.hi = src->posX.i.hi;
-    dst->posY.i.hi = src->posY.i.hi;
-    dst->unk5A = src->unk5A;
-    dst->zPriority = src->zPriority;
-    dst->animSet = src->animSet;
-    dst->flags = FLAG_UNK_2000 | FLAG_UNK_01000000 | FLAG_UNK_04000000 |
-                 FLAG_UNK_08000000 | FLAG_DESTROY_IF_BARELY_OUT_OF_CAMERA |
-                 FLAG_DESTROY_IF_OUT_OF_CAMERA;
-
-    if (src->palette & 0x8000) {
-        dst->palette = src->hitEffect;
-    } else {
-        dst->palette = src->palette;
-    }
-}
-
-void func_8019055C(void) {
-    s32 temp_s3;
-    s8 temp_s4;
-    Entity* entity;
-    s32 i;
-
-    temp_s4 = Random() & 3;
-    temp_s3 = ((Random() & 0xF) << 8) - 0x800;
-
-    for (i = 0; i < 6; i++) {
-        entity = AllocEntity(&g_Entities[224], &g_Entities[256]);
-        if (entity != NULL) {
-            CreateEntityFromEntity(E_EXPLOSION, g_CurrentEntity, entity);
-            entity->ext.generic.unk84.U8.unk1 = 6 - i;
-            entity->ext.generic.unk80.modeS16.unk0 = temp_s3;
-            entity->ext.generic.unk84.U8.unk0 = temp_s4;
-        }
-    }
-}
+#include "../make_explosions.h"
 
 #include "../entity_big_red_fireball.h"
 
diff --git a/src/st/nz0/e_spittle_bone.c b/src/st/nz0/e_spittle_bone.c
index 2e9128e85..70f2f572f 100644
--- a/src/st/nz0/e_spittle_bone.c
+++ b/src/st/nz0/e_spittle_bone.c
@@ -46,7 +46,7 @@ void EntitySpittleBone(Entity* self) {
     case 2:
         AnimateEntity(D_80182524, self);
         self->ext.spittleBone.unk7C =
-            func_801C1034(self->ext.spittleBone.unk7C);
+            UnkCollisionFunc4(self->ext.spittleBone.unk7C);
         if (self->ext.spittleBone.unk82 != 0) {
             self->rotZ += self->ext.spittleBone.unk80;
             self->ext.spittleBone.unk82--;
@@ -71,7 +71,7 @@ void EntitySpittleBone(Entity* self) {
         for (i = 0; i < 6; i++) {
             newEntity = AllocEntity(&g_Entities[224], &g_Entities[256]);
             if (newEntity != NULL) {
-                func_801C1780(E_SPITTLEBONE, self, newEntity);
+                MakeEntityFromId(E_SPITTLEBONE, self, newEntity);
                 newEntity->facingLeft = self->facingLeft;
                 newEntity->flags = FLAG_UNK_2000 | FLAG_UNK_08000000 |
                                    FLAG_DESTROY_IF_BARELY_OUT_OF_CAMERA |
@@ -131,7 +131,7 @@ void EntityRotateSpittlebone(Entity* self) {
     case 1:
         temp1 = self->ext.spittleBone.unk7C & 0x3F;
         prevEntity = &self[-1];
-        temp4 = func_801C1034(self->ext.spittleBone.unk7C);
+        temp4 = UnkCollisionFunc4(self->ext.spittleBone.unk7C);
         self->ext.spittleBone.unk7C = temp4;
         if ((temp4 & 0x3F) != temp1) {
             temp2 = temp4 & 0x3C;
diff --git a/src/st/st0/37308.c b/src/st/st0/37308.c
index e52c0b8b0..db30e3a83 100644
--- a/src/st/st0/37308.c
+++ b/src/st/st0/37308.c
@@ -18,267 +18,17 @@ INCLUDE_ASM("st/st0/nonmatchings/37308", func_801B7308);
 
 #include "../entity_olrox_drool.h"
 
-bool func_801B8338(Point16* unk) {
-    Collider collider;
+#include "../unk_collision_func5.h"
 
-    FallEntity();
-    g_CurrentEntity->posX.val += g_CurrentEntity->velocityX;
-    g_CurrentEntity->posY.val += g_CurrentEntity->velocityY;
-
-    if (g_CurrentEntity->velocityY >= 0) {
-        s16 posX = g_CurrentEntity->posX.i.hi;
-        s16 posY = g_CurrentEntity->posY.i.hi;
-        posX += unk->x;
-        posY += unk->y;
-        g_api.CheckCollision(posX, posY, &collider, 0);
-        if (collider.effects & EFFECT_SOLID) {
-            g_CurrentEntity->posY.i.hi += collider.unk18;
-            g_CurrentEntity->velocityY = -g_CurrentEntity->velocityY / 2;
-            if (g_CurrentEntity->velocityY > FIX(-1.0)) {
-                return true;
-            }
-        }
-    }
-    return false;
-}
-
-u8 func_801B8434(s32 arg0) {
-    Collider collider;
-    u32 bits_67;
-    u32 bits_45;
-    u32 bits_23;
-    u8 bits_01;
-    u16 collEff;
-
-    MoveEntity();
-    bits_67 = 0;
-    bits_23 = 0;
-    bits_45 = 0;
-    bits_01 = arg0 & 3;
-    collEff = 0;
-    switch (bits_01) {
-    case 0:
-        g_CurrentEntity->posY.i.hi += 3;
-        g_api.CheckCollision(g_CurrentEntity->posX.i.hi,
-                             g_CurrentEntity->posY.i.hi, &collider, 0);
-        if (collider.effects != 0) {
-            collEff = collider.effects;
-            g_CurrentEntity->posY.i.hi += collider.unk18;
-            g_api.CheckCollision(
-                g_CurrentEntity->posX.i.hi,
-                (s16)(g_CurrentEntity->posY.i.hi - 4), &collider, 0);
-            if (collider.effects & EFFECT_UNK_0002) {
-                bits_67 = 0x40;
-                if (g_CurrentEntity->velocityX > 0) {
-                    bits_01 = 2;
-                } else {
-                    bits_01 = 3;
-                    g_CurrentEntity->velocityX = -g_CurrentEntity->velocityX;
-                }
-                g_CurrentEntity->velocityY = -g_CurrentEntity->velocityX;
-                g_CurrentEntity->velocityX = 0;
-            }
-        } else {
-            bits_67 = 0x80;
-            g_CurrentEntity->posX.val -= g_CurrentEntity->velocityX;
-            if (g_CurrentEntity->velocityX > 0) {
-                bits_01 = 3;
-            } else {
-                bits_01 = 2;
-                g_CurrentEntity->velocityX = -g_CurrentEntity->velocityX;
-            }
-            g_CurrentEntity->velocityY = g_CurrentEntity->velocityX;
-            g_CurrentEntity->velocityX = 0;
-        }
-        break;
-
-    case 1:
-        g_CurrentEntity->posY.i.hi -= 3;
-        g_api.CheckCollision(g_CurrentEntity->posX.i.hi,
-                             g_CurrentEntity->posY.i.hi, &collider, 0);
-        if (collider.effects != 0) {
-            collEff = collider.effects;
-            g_CurrentEntity->posY.i.hi += collider.unk20;
-            g_api.CheckCollision(
-                g_CurrentEntity->posX.i.hi,
-                (s16)(g_CurrentEntity->posY.i.hi + 4), &collider, 0);
-            if (collider.effects & EFFECT_UNK_0002) {
-                bits_67 = 0x40;
-                if (g_CurrentEntity->velocityX > 0) {
-                    bits_01 = 2;
-                } else {
-                    bits_01 = 3;
-                    g_CurrentEntity->velocityX = -g_CurrentEntity->velocityX;
-                }
-                g_CurrentEntity->velocityY = g_CurrentEntity->velocityX;
-                g_CurrentEntity->velocityX = 0;
-            }
-        } else {
-            bits_67 = 0x80;
-            g_CurrentEntity->posX.val -= g_CurrentEntity->velocityX;
-            if (g_CurrentEntity->velocityX > 0) {
-                bits_01 = 3;
-            } else {
-                bits_01 = 2;
-                g_CurrentEntity->velocityX = -g_CurrentEntity->velocityX;
-            }
-            g_CurrentEntity->velocityY = -g_CurrentEntity->velocityX;
-            g_CurrentEntity->velocityX = 0;
-        }
-        break;
-
-    case 2:
-        g_CurrentEntity->posX.i.hi += 3;
-        g_api.CheckCollision(g_CurrentEntity->posX.i.hi,
-                             g_CurrentEntity->posY.i.hi, &collider, 0);
-        if (collider.effects != 0) {
-            collEff = collider.effects;
-            g_CurrentEntity->posX.i.hi += collider.unk14;
-            g_api.CheckCollision((s16)(g_CurrentEntity->posX.i.hi - 4),
-                                 g_CurrentEntity->posY.i.hi, &collider, 0);
-            if (collider.effects & EFFECT_SOLID) {
-                bits_67 = 0x40;
-                if (g_CurrentEntity->velocityY > 0) {
-                    bits_01 = 0;
-                } else {
-                    bits_01 = 1;
-                    g_CurrentEntity->velocityY = -g_CurrentEntity->velocityY;
-                }
-                g_CurrentEntity->velocityX = -g_CurrentEntity->velocityY;
-                g_CurrentEntity->velocityY = 0;
-            }
-        } else {
-            bits_67 = 0x80;
-            g_CurrentEntity->posY.val -= g_CurrentEntity->velocityY;
-            if (g_CurrentEntity->velocityY > 0) {
-                bits_01 = 1;
-            } else {
-                bits_01 = 0;
-                g_CurrentEntity->velocityY = -g_CurrentEntity->velocityY;
-            }
-            g_CurrentEntity->velocityX = g_CurrentEntity->velocityY;
-            g_CurrentEntity->velocityY = 0;
-        }
-        break;
-
-    case 3:
-        g_CurrentEntity->posX.i.hi -= 3;
-        g_api.CheckCollision(g_CurrentEntity->posX.i.hi,
-                             g_CurrentEntity->posY.i.hi, &collider, 0);
-        if (collider.effects != 0) {
-            collEff = collider.effects;
-            g_CurrentEntity->posX.i.hi += collider.unk1C;
-            g_api.CheckCollision((s16)(g_CurrentEntity->posX.i.hi + 4),
-                                 g_CurrentEntity->posY.i.hi, &collider, 0);
-            if (collider.effects & EFFECT_SOLID) {
-                bits_67 = 0x40;
-                if (g_CurrentEntity->velocityY > 0) {
-                    bits_01 = 0;
-                } else {
-                    bits_01 = 1;
-                    g_CurrentEntity->velocityY = -g_CurrentEntity->velocityY;
-                }
-                g_CurrentEntity->velocityX = g_CurrentEntity->velocityY;
-                g_CurrentEntity->velocityY = 0;
-            }
-        } else {
-            bits_67 = 0x80;
-            g_CurrentEntity->posY.val -= g_CurrentEntity->velocityY;
-            if (g_CurrentEntity->velocityY > 0) {
-                bits_01 = 1;
-            } else {
-                bits_01 = 0;
-                g_CurrentEntity->velocityY = -g_CurrentEntity->velocityY;
-            }
-            g_CurrentEntity->velocityX = -g_CurrentEntity->velocityY;
-            g_CurrentEntity->velocityY = 0;
-        }
-    }
-
-    if (collEff & EFFECT_UNK_8000) {
-        bits_23 = 4;
-    }
-    if (collEff & EFFECT_UNK_1000) {
-        bits_23 = 8;
-    }
-    if (collEff & EFFECT_UNK_2000) {
-        bits_23 = 0xC;
-    }
-    if (collEff & EFFECT_UNK_0800) {
-        bits_45 = 0x20;
-    }
-    if (collEff & EFFECT_UNK_4000) {
-        bits_45 = 0x10;
-    }
-    bits_01 = (bits_45 + (bits_23 + (bits_67 + bits_01)));
-    return bits_01;
-}
+#include "../unk_collision_func4.h"
 
 #include "../entity_intense_explosion.h"
 
-void func_801B8AB4(Entity* entity) {
-    if (entity->step == 0) {
-        InitializeEntity(g_InitializeEntityData0);
-        entity->unk6C = 0xF0;
-        entity->rotX = 0x01A0;
-        entity->rotY = 0x01A0;
-        entity->animSet = ANIMSET_DRA(8);
-        entity->animCurFrame = 1;
-        entity->zPriority += 16;
-        if (entity->params) {
-            entity->palette = entity->params;
-        } else {
-            entity->palette = 0x8160;
-        }
+#include "../initialize_unk_entity.h"
 
-        entity->step++;
-    } else {
-        MoveEntity();
-        if (!AnimateEntity(D_80181F04, entity)) {
-            DestroyEntity(entity);
-        }
-    }
-}
+#include "../make_entity_from_id.h"
 
-void func_801B8B80(u16 entityId, Entity* src, Entity* dst) {
-    DestroyEntity(dst);
-    dst->entityId = entityId;
-    dst->pfnUpdate = PfnEntityUpdates[entityId - 1];
-    dst->posX.i.hi = src->posX.i.hi;
-    dst->posY.i.hi = src->posY.i.hi;
-    dst->unk5A = src->unk5A;
-    dst->zPriority = src->zPriority;
-    dst->animSet = src->animSet;
-    dst->flags = FLAG_UNK_2000 | FLAG_UNK_01000000 | FLAG_UNK_04000000 |
-                 FLAG_UNK_08000000 | FLAG_DESTROY_IF_BARELY_OUT_OF_CAMERA |
-                 FLAG_DESTROY_IF_OUT_OF_CAMERA;
-
-    if (src->palette & 0x8000) {
-        dst->palette = src->hitEffect;
-    } else {
-        dst->palette = src->palette;
-    }
-}
-
-void func_801B8C48(void) {
-    s32 temp_s3;
-    s8 temp_s4;
-    Entity* entity;
-    s32 i;
-
-    temp_s4 = Random() & 3;
-    temp_s3 = ((Random() & 0xF) << 8) - 0x800;
-
-    for (i = 0; i < 6; i++) {
-        entity = AllocEntity(&g_Entities[224], &g_Entities[256]);
-        if (entity != NULL) {
-            CreateEntityFromEntity(E_EXPLOSION, g_CurrentEntity, entity);
-            entity->ext.generic.unk84.U8.unk1 = 6 - i;
-            entity->ext.generic.unk80.modeS16.unk0 = temp_s3;
-            entity->ext.generic.unk84.U8.unk0 = temp_s4;
-        }
-    }
-}
+#include "../make_explosions.h"
 
 #include "../entity_big_red_fireball.h"
 
diff --git a/src/st/unk_collision_func4.h b/src/st/unk_collision_func4.h
new file mode 100644
index 000000000..268124a4b
--- /dev/null
+++ b/src/st/unk_collision_func4.h
@@ -0,0 +1,171 @@
+u8 UnkCollisionFunc4(s32 arg0) {
+    Collider collider;
+    u32 bits_67;
+    u32 bits_45;
+    u32 bits_23;
+    u8 bits_01;
+    u16 collEff;
+
+    MoveEntity();
+    bits_67 = 0;
+    bits_23 = 0;
+    bits_45 = 0;
+    bits_01 = arg0 & 3;
+    collEff = 0;
+    switch (bits_01) {
+    case 0:
+        g_CurrentEntity->posY.i.hi += 3;
+        g_api.CheckCollision(g_CurrentEntity->posX.i.hi,
+                             g_CurrentEntity->posY.i.hi, &collider, 0);
+        if (collider.effects != 0) {
+            collEff = collider.effects;
+            g_CurrentEntity->posY.i.hi += collider.unk18;
+            g_api.CheckCollision(
+                g_CurrentEntity->posX.i.hi,
+                (s16)(g_CurrentEntity->posY.i.hi - 4), &collider, 0);
+            if (collider.effects & EFFECT_UNK_0002) {
+                bits_67 = 0x40;
+                if (g_CurrentEntity->velocityX > 0) {
+                    bits_01 = 2;
+                } else {
+                    bits_01 = 3;
+                    g_CurrentEntity->velocityX = -g_CurrentEntity->velocityX;
+                }
+                g_CurrentEntity->velocityY = -g_CurrentEntity->velocityX;
+                g_CurrentEntity->velocityX = 0;
+            }
+        } else {
+            bits_67 = 0x80;
+            g_CurrentEntity->posX.val -= g_CurrentEntity->velocityX;
+            if (g_CurrentEntity->velocityX > 0) {
+                bits_01 = 3;
+            } else {
+                bits_01 = 2;
+                g_CurrentEntity->velocityX = -g_CurrentEntity->velocityX;
+            }
+            g_CurrentEntity->velocityY = g_CurrentEntity->velocityX;
+            g_CurrentEntity->velocityX = 0;
+        }
+        break;
+
+    case 1:
+        g_CurrentEntity->posY.i.hi -= 3;
+        g_api.CheckCollision(g_CurrentEntity->posX.i.hi,
+                             g_CurrentEntity->posY.i.hi, &collider, 0);
+        if (collider.effects != 0) {
+            collEff = collider.effects;
+            g_CurrentEntity->posY.i.hi += collider.unk20;
+            g_api.CheckCollision(
+                g_CurrentEntity->posX.i.hi,
+                (s16)(g_CurrentEntity->posY.i.hi + 4), &collider, 0);
+            if (collider.effects & EFFECT_UNK_0002) {
+                bits_67 = 0x40;
+                if (g_CurrentEntity->velocityX > 0) {
+                    bits_01 = 2;
+                } else {
+                    bits_01 = 3;
+                    g_CurrentEntity->velocityX = -g_CurrentEntity->velocityX;
+                }
+                g_CurrentEntity->velocityY = g_CurrentEntity->velocityX;
+                g_CurrentEntity->velocityX = 0;
+            }
+        } else {
+            bits_67 = 0x80;
+            g_CurrentEntity->posX.val -= g_CurrentEntity->velocityX;
+            if (g_CurrentEntity->velocityX > 0) {
+                bits_01 = 3;
+            } else {
+                bits_01 = 2;
+                g_CurrentEntity->velocityX = -g_CurrentEntity->velocityX;
+            }
+            g_CurrentEntity->velocityY = -g_CurrentEntity->velocityX;
+            g_CurrentEntity->velocityX = 0;
+        }
+        break;
+
+    case 2:
+        g_CurrentEntity->posX.i.hi += 3;
+        g_api.CheckCollision(g_CurrentEntity->posX.i.hi,
+                             g_CurrentEntity->posY.i.hi, &collider, 0);
+        if (collider.effects != 0) {
+            collEff = collider.effects;
+            g_CurrentEntity->posX.i.hi += collider.unk14;
+            g_api.CheckCollision((s16)(g_CurrentEntity->posX.i.hi - 4),
+                                 g_CurrentEntity->posY.i.hi, &collider, 0);
+            if (collider.effects & EFFECT_SOLID) {
+                bits_67 = 0x40;
+                if (g_CurrentEntity->velocityY > 0) {
+                    bits_01 = 0;
+                } else {
+                    bits_01 = 1;
+                    g_CurrentEntity->velocityY = -g_CurrentEntity->velocityY;
+                }
+                g_CurrentEntity->velocityX = -g_CurrentEntity->velocityY;
+                g_CurrentEntity->velocityY = 0;
+            }
+        } else {
+            bits_67 = 0x80;
+            g_CurrentEntity->posY.val -= g_CurrentEntity->velocityY;
+            if (g_CurrentEntity->velocityY > 0) {
+                bits_01 = 1;
+            } else {
+                bits_01 = 0;
+                g_CurrentEntity->velocityY = -g_CurrentEntity->velocityY;
+            }
+            g_CurrentEntity->velocityX = g_CurrentEntity->velocityY;
+            g_CurrentEntity->velocityY = 0;
+        }
+        break;
+
+    case 3:
+        g_CurrentEntity->posX.i.hi -= 3;
+        g_api.CheckCollision(g_CurrentEntity->posX.i.hi,
+                             g_CurrentEntity->posY.i.hi, &collider, 0);
+        if (collider.effects != 0) {
+            collEff = collider.effects;
+            g_CurrentEntity->posX.i.hi += collider.unk1C;
+            g_api.CheckCollision((s16)(g_CurrentEntity->posX.i.hi + 4),
+                                 g_CurrentEntity->posY.i.hi, &collider, 0);
+            if (collider.effects & EFFECT_SOLID) {
+                bits_67 = 0x40;
+                if (g_CurrentEntity->velocityY > 0) {
+                    bits_01 = 0;
+                } else {
+                    bits_01 = 1;
+                    g_CurrentEntity->velocityY = -g_CurrentEntity->velocityY;
+                }
+                g_CurrentEntity->velocityX = g_CurrentEntity->velocityY;
+                g_CurrentEntity->velocityY = 0;
+            }
+        } else {
+            bits_67 = 0x80;
+            g_CurrentEntity->posY.val -= g_CurrentEntity->velocityY;
+            if (g_CurrentEntity->velocityY > 0) {
+                bits_01 = 1;
+            } else {
+                bits_01 = 0;
+                g_CurrentEntity->velocityY = -g_CurrentEntity->velocityY;
+            }
+            g_CurrentEntity->velocityX = -g_CurrentEntity->velocityY;
+            g_CurrentEntity->velocityY = 0;
+        }
+    }
+
+    if (collEff & EFFECT_UNK_8000) {
+        bits_23 = 4;
+    }
+    if (collEff & EFFECT_UNK_1000) {
+        bits_23 = 8;
+    }
+    if (collEff & EFFECT_UNK_2000) {
+        bits_23 = 0xC;
+    }
+    if (collEff & EFFECT_UNK_0800) {
+        bits_45 = 0x20;
+    }
+    if (collEff & EFFECT_UNK_4000) {
+        bits_45 = 0x10;
+    }
+    bits_01 = (bits_45 + (bits_23 + (bits_67 + bits_01)));
+    return bits_01;
+}
diff --git a/src/st/unk_collision_func5.h b/src/st/unk_collision_func5.h
new file mode 100644
index 000000000..40accc7d9
--- /dev/null
+++ b/src/st/unk_collision_func5.h
@@ -0,0 +1,23 @@
+bool UnkCollisionFunc5(Point16* unk) {
+    Collider collider;
+
+    FallEntity();
+    g_CurrentEntity->posX.val += g_CurrentEntity->velocityX;
+    g_CurrentEntity->posY.val += g_CurrentEntity->velocityY;
+
+    if (g_CurrentEntity->velocityY >= 0) {
+        s16 posX = g_CurrentEntity->posX.i.hi;
+        s16 posY = g_CurrentEntity->posY.i.hi;
+        posX += unk->x;
+        posY += unk->y;
+        g_api.CheckCollision(posX, posY, &collider, 0);
+        if (collider.effects & EFFECT_SOLID) {
+            g_CurrentEntity->posY.i.hi += collider.unk18;
+            g_CurrentEntity->velocityY = -g_CurrentEntity->velocityY / 2;
+            if (g_CurrentEntity->velocityY > FIX(-1.0)) {
+                return true;
+            }
+        }
+    }
+    return false;
+}