diff --git a/config/splat.us.borbo3.yaml b/config/splat.us.borbo3.yaml
index 9799436fe..01d346736 100644
--- a/config/splat.us.borbo3.yaml
+++ b/config/splat.us.borbo3.yaml
@@ -43,11 +43,12 @@ segments:
       - [0x390, data] #e_init
       - [0x510, .data, st_debug]
       - [0x590, data] # e_breakable
-      - [0x5F0, data]
+      - [0x5F0, .data, d_prize_drops]
+      - [0x5FC, data]
       - [0x750, .data, st_update]
       - [0x77C, .data, collision]
       - [0xB3C, .data, e_red_door] # e_red_door
-      - [0xB54, data] # st_common 
+      - [0xB54, .data, st_common] # st_common 
       - [0xD54, data] # e_collect
       - [0x1044, data, e_misc]
       - [0x1160, .data, e_particles]
diff --git a/config/symbols.us.borbo3.txt b/config/symbols.us.borbo3.txt
index 95b15ac1a..afad0e13b 100644
--- a/config/symbols.us.borbo3.txt
+++ b/config/symbols.us.borbo3.txt
@@ -1,3 +1,6 @@
+RBO3_pStObjLayoutHorizontal = 0x801801EC;
+RBO3_pStObjLayoutVertical = 0x801802C0;
+RBO3_EntityUpdates = 0x80180390;
 g_EInitBreakable = 0x80180414;
 g_EInitObtainable = 0x80180420;
 g_EInitParticle = 0x8018042C;
@@ -12,6 +15,7 @@ g_eBreakableHitboxes = 0x801805C0;
 g_eBreakableExplosionTypes = 0x801805C8;
 g_eBreakableanimSets = 0x801805D0;
 g_eBreakableDrawModes = 0x801805E0;
+RBO3_PrizeDrops = 0x801805F0;
 g_SineTable = 0x80180B54;
 c_GoldPrizes = 0x80180EF0;
 c_HeartPrizes = 0x80180F80;
diff --git a/src/boss/rbo3/d_prize_drops.c b/src/boss/rbo3/d_prize_drops.c
new file mode 100644
index 000000000..8e3ad410f
--- /dev/null
+++ b/src/boss/rbo3/d_prize_drops.c
@@ -0,0 +1,4 @@
+// SPDX-License-Identifier: AGPL-3.0-or-later
+#include "rbo3.h"
+
+u16 OVL_EXPORT(PrizeDrops)[] = {0x010F, 0x020C, 0x0307, 0x0404, 0x0520, 0x00FF};
diff --git a/src/boss/rbo3/rbo3.c b/src/boss/rbo3/rbo3.c
index d95c413ef..00e0a3bde 100644
--- a/src/boss/rbo3/rbo3.c
+++ b/src/boss/rbo3/rbo3.c
@@ -141,7 +141,7 @@ void func_us_80191438(Entity* self) {
 extern Entity D_8007A958;
 extern Entity D_8007C0D8;
 extern EInit D_us_80180480;
-extern u8 D_us_801805F0[];
+extern u8 RBO3_PrizeDrops[];
 extern u8 D_us_801805FC[];
 extern u8 D_us_8018060C[];
 extern u8 D_us_80180618[];
@@ -184,7 +184,7 @@ void EntityMedusa(Entity* self) {
 
     case 2:
         // n.b.! AnimateEntity is not declared
-        if (!AnimateEntity(D_us_801805F0, self)) {
+        if (!AnimateEntity(RBO3_PrizeDrops, self)) {
             self->hitboxState = 3;
             SetStep(3);
         }
diff --git a/src/boss/rbo3/rbo3.h b/src/boss/rbo3/rbo3.h
index 02214ddc8..18bbc04d9 100644
--- a/src/boss/rbo3/rbo3.h
+++ b/src/boss/rbo3/rbo3.h
@@ -15,6 +15,8 @@ typedef enum {
     /* 0x0A */ E_EQUIP_ITEM_DROP = 0xA,
     /* 0x0B */ E_RELIC_ORB,
     /* 0x11 */ E_MEDUSA,
+    /* 0x14 */ E_ID_14 = 0x14,
+    /* 0x15 */ E_GREY_PUFF,
     /* 0x18 */ UNK_ENTITY_24 = 24,
     /* 0x19 */ UNK_ENTITY_25,
     /* 0x1A */ UNK_ENTITY_26,
diff --git a/src/boss/rbo3/st_common.c b/src/boss/rbo3/st_common.c
index 740c8ea3c..5574245d6 100644
--- a/src/boss/rbo3/st_common.c
+++ b/src/boss/rbo3/st_common.c
@@ -1,70 +1,3 @@
 // SPDX-License-Identifier: AGPL-3.0-or-later
-#include "common.h"
-
-INCLUDE_ASM("boss/rbo3/nonmatchings/st_common", DestroyEntity);
-
-INCLUDE_ASM("boss/rbo3/nonmatchings/st_common", DestroyEntitiesFromIndex);
-
-INCLUDE_ASM("boss/rbo3/nonmatchings/st_common", PreventEntityFromRespawning);
-
-INCLUDE_ASM("boss/rbo3/nonmatchings/st_common", AnimateEntity);
-
-INCLUDE_ASM("boss/rbo3/nonmatchings/st_common", UnkAnimFunc);
-
-INCLUDE_ASM("boss/rbo3/nonmatchings/st_common", GetDistanceToPlayerX);
-
-INCLUDE_ASM("boss/rbo3/nonmatchings/st_common", GetDistanceToPlayerY);
-
-INCLUDE_ASM("boss/rbo3/nonmatchings/st_common", GetSideToPlayer);
-
-INCLUDE_ASM("boss/rbo3/nonmatchings/st_common", MoveEntity);
-
-INCLUDE_ASM("boss/rbo3/nonmatchings/st_common", FallEntity);
-
-INCLUDE_ASM("boss/rbo3/nonmatchings/st_common", UnkCollisionFunc3);
-
-INCLUDE_ASM("boss/rbo3/nonmatchings/st_common", UnkCollisionFunc2);
-
-INCLUDE_ASM("boss/rbo3/nonmatchings/st_common", AllocEntity);
-
-INCLUDE_ASM("boss/rbo3/nonmatchings/st_common", GetSineScaled);
-
-INCLUDE_ASM("boss/rbo3/nonmatchings/st_common", GetSine);
-
-INCLUDE_ASM("boss/rbo3/nonmatchings/st_common", SetEntityVelocityFromAngle);
-
-INCLUDE_ASM("boss/rbo3/nonmatchings/st_common", Ratan2Shifted);
-
-INCLUDE_ASM("boss/rbo3/nonmatchings/st_common", GetAngleBetweenEntitiesShifted);
-
-INCLUDE_ASM("boss/rbo3/nonmatchings/st_common", GetAnglePointToEntity);
-
-INCLUDE_ASM("boss/rbo3/nonmatchings/st_common", AdjustValueWithinThreshold);
-
-INCLUDE_ASM("boss/rbo3/nonmatchings/st_common", UnkEntityFunc0);
-
-INCLUDE_ASM("boss/rbo3/nonmatchings/st_common", Ratan2);
-
-INCLUDE_ASM("boss/rbo3/nonmatchings/st_common", GetAngleBetweenEntities);
-
-INCLUDE_ASM("boss/rbo3/nonmatchings/st_common", func_us_80197148);
-
-INCLUDE_ASM("boss/rbo3/nonmatchings/st_common", GetNormalizedAngle);
-
-INCLUDE_ASM("boss/rbo3/nonmatchings/st_common", SetStep);
-
-INCLUDE_ASM("boss/rbo3/nonmatchings/st_common", SetSubStep);
-
-INCLUDE_ASM("boss/rbo3/nonmatchings/st_common", EntityExplosionSpawn);
-
-INCLUDE_ASM("boss/rbo3/nonmatchings/st_common", InitializeEntity);
-
-INCLUDE_ASM("boss/rbo3/nonmatchings/st_common", EntityDummy);
-
-INCLUDE_ASM("boss/rbo3/nonmatchings/st_common", UnkCollisionFunc);
-
-INCLUDE_ASM("boss/rbo3/nonmatchings/st_common", CheckFieldCollision);
-
-INCLUDE_ASM("boss/rbo3/nonmatchings/st_common", GetPlayerCollisionWith);
-
-INCLUDE_ASM("boss/rbo3/nonmatchings/st_common", ReplaceBreakableWithItemDrop);
+#include "rbo3.h"
+#include "../../st/st_common.h"