diff --git a/asm/code_800ED38.s b/asm/code_800ED38.s
index 396d54a29..5a0d7dc16 100644
--- a/asm/code_800ED38.s
+++ b/asm/code_800ED38.s
@@ -1417,78 +1417,4 @@ _0800F8C0:
 _0800F8CC: .4byte gDungeonPokemonSprites
 	thumb_func_end sub_800F7D0
 
-	thumb_func_start AddPokemonDungeonSprite
-    @ void AddPokemonDungeonSprite(int id, short species, Position *pos, ?)
-AddPokemonDungeonSprite:
-	push {r4-r7,lr}
-	mov r7, r8
-	push {r7}
-	adds r5, r0, 0
-	adds r7, r2, 0
-	mov r8, r3
-	lsls r1, 16
-	asrs r6, r1, 16
-	ldr r0, _0800F92C
-	ldr r0, [r0]
-	cmp r0, 0
-	beq _0800F920
-	adds r0, r5, 0
-	bl GetDungeonPokemonSprite
-	adds r4, r0, 0
-	cmp r4, 0
-	bne _0800F920
-	bl NewDungeonPokemonSprite
-	adds r1, r0, 0
-	cmp r1, 0
-	beq _0800F920
-	movs r0, 0x1
-	strb r0, [r1]
-	str r5, [r1, 0x4]
-	strh r6, [r1, 0x8]
-	str r4, [r1, 0xC]
-	ldr r0, [r7]
-	str r0, [r1, 0x14]
-	mov r0, r8
-	strb r0, [r1, 0x11]
-	ldr r0, _0800F930
-	ldr r0, [r0]
-	str r0, [r1, 0x1C]
-	str r0, [r1, 0x18]
-	str r4, [r1, 0x28]
-	str r4, [r1, 0x2C]
-	str r4, [r1, 0x30]
-	str r4, [r1, 0x34]
-_0800F920:
-	pop {r3}
-	mov r8, r3
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_0800F92C: .4byte gDungeonPokemonSprites
-_0800F930: .4byte gUnknown_80D3564
-	thumb_func_end AddPokemonDungeonSprite
-
-	thumb_func_start DeletePokemonDungeonSprite
-    @ void DeletePokemonDungeonSprite(int id)
-DeletePokemonDungeonSprite:
-	push {lr}
-	adds r1, r0, 0
-	ldr r0, _0800F954
-	ldr r0, [r0]
-	cmp r0, 0
-	beq _0800F950
-	adds r0, r1, 0
-	bl GetDungeonPokemonSprite
-	cmp r0, 0
-	beq _0800F950
-	movs r1, 0x40
-	bl MemoryClear8
-_0800F950:
-	pop {r0}
-	bx r0
-	.align 2, 0
-_0800F954: .4byte gDungeonPokemonSprites
-	thumb_func_end DeletePokemonDungeonSprite
-
     .align 2,0
diff --git a/src/code_800F958.c b/src/code_800F958.c
index dbd9a1e5c..a76e80e9c 100644
--- a/src/code_800F958.c
+++ b/src/code_800F958.c
@@ -1,10 +1,61 @@
 #include "global.h"
 #include "code_800F958.h"
+#include "memory.h"
 
 extern DungeonPokemonSprites *gDungeonPokemonSprites;
-
+extern DungeonPokemonSprite *NewDungeonPokemonSprite(void);
 extern DungeonPokemonSprite* GetDungeonPokemonSprite(s32 id);
 
+extern Position gUnknown_80D3564;
+
+void AddPokemonDungeonSprite(s32 id, s16 species, Position *pos, u32 r3) {
+    DungeonPokemonSprite *dSprite;
+    DungeonPokemonSprite *newSprite;
+    Position newPos;
+    s32 species_s32;
+
+    species_s32 = species;
+
+    if(gDungeonPokemonSprites == NULL)
+        return;
+
+    dSprite = GetDungeonPokemonSprite(id);
+    if(dSprite != NULL)
+        return;
+
+    newSprite = NewDungeonPokemonSprite();
+    if(newSprite == NULL)
+        return;
+
+    newSprite->exists = 1;
+    newSprite->id = id;
+    newSprite->species = species_s32;
+    newSprite->status = 0;
+    newSprite->pos = *pos;
+    newSprite->unk11 = r3;
+    newPos = gUnknown_80D3564;
+    newSprite->statusOffsets[1] = newPos;
+    newSprite->statusOffsets[0] = newPos;
+    newSprite->statusSprites[0].status = 0;
+    newSprite->statusSprites[0].frame = 0;
+    newSprite->statusSprites[1].status = 0;
+    newSprite->statusSprites[1].frame = 0;
+}
+
+void DeletePokemonDungeonSprite(s32 id)
+{
+    DungeonPokemonSprite *dSprite;
+
+    if(gDungeonPokemonSprites == NULL)
+        return;
+
+    dSprite = GetDungeonPokemonSprite(id);
+    if(dSprite == NULL)
+        return;
+
+    MemoryClear8((u8 *)dSprite, sizeof(DungeonPokemonSprite));
+}
+
 void sub_800F958(s32 dungeonSpriteID, Position *pos, Position *statusOffsets, u32 a3)
 {
     DungeonPokemonSprite *dSprite;