decomp sub_8083568 thanks to @jiangzhengwenjz

asm/code_808333C.s

@@ -1,83 +0,0 @@
-	#include "asm/constants/gba_constants.inc"
-  	#include "asm/macros.inc"
-
-  	.syntax unified
-
-  	.text
-
-	thumb_func_start sub_8083568
-sub_8083568:
-	push {r4,r5,lr}
-	lsls r2, 24
-	lsrs r5, r2, 24
-	ldr r2, _080835E0
-	ldr r2, [r2]
-	ldr r4, _080835E4
-	adds r3, r2, r4
-	movs r4, 0
-	ldrsh r3, [r3, r4]
-	subs r3, r0, r3
-	ldr r0, _080835E8
-	adds r2, r0
-	movs r4, 0
-	ldrsh r0, [r2, r4]
-	subs r4, r1, r0
-	movs r0, 0x10
-	negs r0, r0
-	cmp r3, r0
-	blt _080835F8
-	cmp r4, r0
-	blt _080835F8
-	cmp r3, 0xFF
-	bgt _080835F8
-	cmp r4, 0xAF
-	bgt _080835F8
-	ldr r1, _080835EC
-	lsls r0, r5, 1
-	adds r0, r5
-	lsls r0, 2
-	adds r0, r1
-	movs r1, 0x8
-	ldrsh r2, [r0, r1]
-	adds r2, r3, r2
-	ldr r1, _080835F0
-	ands r2, r1
-	ldrh r3, [r0, 0x2]
-	movs r1, 0xFE
-	lsls r1, 8
-	ands r1, r3
-	orrs r1, r2
-	strh r1, [r0, 0x2]
-	movs r1, 0xA
-	ldrsh r2, [r0, r1]
-	adds r2, r4, r2
-	ldr r1, _080835F4
-	ands r2, r1
-	lsls r2, 4
-	ldrh r3, [r0, 0x6]
-	movs r1, 0xF
-	ands r1, r3
-	orrs r1, r2
-	strh r1, [r0, 0x6]
-	movs r1, 0
-	movs r2, 0
-	movs r3, 0
-	bl AddSprite
-	movs r0, 0x1
-	b _080835FA
-	.align 2, 0
-_080835E0: .4byte gDungeon
-_080835E4: .4byte 0x000181f0
-_080835E8: .4byte 0x000181f2
-_080835EC: .4byte gUnknown_202ED28
-_080835F0: .4byte 0x000001ff
-_080835F4: .4byte 0x00000fff
-_080835F8:
-	movs r0, 0
-_080835FA:
-	pop {r4,r5}
-	pop {r1}
-	bx r1
-	thumb_func_end sub_8083568
-
-	.align 2, 0

ld_script.txt

@@ -272,7 +272,7 @@ SECTIONS {
         asm/code_807FCD4.o(.text);
         src/code_8083288.o(.text);
         src/dungeon_range.o(.text);
-        asm/code_808333C.o(.text);
+        src/code_808333C.o(.text);
         src/dungeon_leader.o(.text);
         asm/code_8083654.o(.text);
         src/dungeon_music.o(.text);

src/code_808333C.c

@@ -0,0 +1,61 @@
+#include "global.h"
+#include "structs/str_dungeon.h"
+
+struct unkStruct_202ED28
+{
+    SpriteOAM sp;
+    s16 unk8;
+    s16 unkA;
+};
+
+struct unkStruct_202ED28 gUnknown_202ED28[4]; // seeing index 3 used a lot
+
+bool8 sub_8083568(s32 inX, s32 inY, u8 index) {
+    s32 x;
+    s32 y;
+    SpriteOAM *sp;
+    s32 tmp2;
+#ifdef NONMATCHING
+    s32 tmp;
+#else
+    register s32 tmp asm("r2");
+#endif
+
+    x = inX - gDungeon->cameraPixelPos.x;
+    y = inY - gDungeon->cameraPixelPos.y;
+    
+    if (x >= -16 && y >= -16 && x <= 255 && y <= 175)
+    {
+        struct unkStruct_202ED28 *ptr = gUnknown_202ED28;
+        sp = &ptr[index].sp;
+
+        tmp = ptr[index].unk8;
+        tmp = x + ptr[index].unk8;
+        tmp &= SPRITEOAM_MASK_X;
+
+        x = sp->attrib2;
+        tmp2 = (0xFE << 8);
+        tmp2 &= x;
+        tmp2 |= tmp;
+        sp->attrib2 = tmp2;
+
+        tmp = ptr[index].unkA;
+        tmp = y + ptr[index].unkA;
+        tmp &= SPRITEOAM_MAX_UNK6_4;
+        tmp <<= SPRITEOAM_SHIFT_UNK6_4;
+
+        x = sp->unk6;
+        tmp2 = 0xF;
+        tmp2 &= x;
+        tmp2 |= tmp;
+        sp->unk6 = tmp2;
+
+        
+        AddSprite(sp, 0, NULL, NULL);
+        return TRUE;
+    }
+    else
+    {
+        return FALSE;
+    }
+}