diff --git a/asm/smokescreen.s b/asm/smokescreen.s
deleted file mode 100644
index 464e25c40..000000000
--- a/asm/smokescreen.s
+++ /dev/null
@@ -1,214 +0,0 @@
-	.include "asm/macros.inc"
-	.include "constants/constants.inc"
-
-	.syntax unified
-
-	.text
-
-	thumb_func_start sub_807521C
-sub_807521C: @ 807521C
-	push {r4-r7,lr}
-	mov r7, r10
-	mov r6, r9
-	mov r5, r8
-	push {r5-r7}
-	lsls r0, 16
-	lsrs r6, r0, 16
-	lsls r1, 16
-	lsrs r7, r1, 16
-	lsls r2, 24
-	lsrs r4, r2, 24
-	ldr r5, =gUnknown_0831C620
-	ldrh r0, [r5, 0x6]
-	bl GetSpriteTileStartByTag
-	lsls r0, 16
-	ldr r1, =0xffff0000
-	cmp r0, r1
-	bne _0807524E
-	adds r0, r5, 0
-	bl LoadCompressedObjectPicUsingHeap
-	ldr r0, =gUnknown_0831C628
-	bl LoadCompressedObjectPaletteUsingHeap
-_0807524E:
-	ldr r0, =sub_8075370
-	bl CreateInvisibleSpriteWithCallback
-	mov r8, r0
-	mov r0, r8
-	lsls r0, 24
-	lsrs r0, 24
-	mov r8, r0
-	lsls r5, r0, 4
-	add r5, r8
-	lsls r5, 2
-	ldr r0, =gSprites
-	adds r5, r0
-	strh r4, [r5, 0x30]
-	ldr r0, =gUnknown_0831C688
-	mov r9, r0
-	lsls r6, 16
-	asrs r0, r6, 16
-	mov r10, r0
-	ldr r0, =0xfff00000
-	adds r6, r0
-	asrs r6, 16
-	lsls r4, r7, 16
-	asrs r7, r4, 16
-	adds r4, r0
-	asrs r4, 16
-	mov r0, r9
-	adds r1, r6, 0
-	adds r2, r4, 0
-	movs r3, 0x2
-	bl CreateSprite
-	lsls r0, 24
-	lsrs r0, 24
-	lsls r1, r0, 4
-	adds r1, r0
-	lsls r1, 2
-	ldr r0, =gSprites
-	adds r1, r0
-	mov r0, r8
-	strh r0, [r1, 0x2E]
-	ldrh r0, [r5, 0x2E]
-	adds r0, 0x1
-	strh r0, [r5, 0x2E]
-	adds r0, r1, 0
-	bl AnimateSprite
-	mov r0, r9
-	mov r1, r10
-	adds r2, r4, 0
-	movs r3, 0x2
-	bl CreateSprite
-	lsls r0, 24
-	lsrs r0, 24
-	lsls r4, r0, 4
-	adds r4, r0
-	lsls r4, 2
-	ldr r0, =gSprites
-	adds r4, r0
-	mov r0, r8
-	strh r0, [r4, 0x2E]
-	ldrh r0, [r5, 0x2E]
-	adds r0, 0x1
-	strh r0, [r5, 0x2E]
-	adds r0, r4, 0
-	movs r1, 0x1
-	bl StartSpriteAnim
-	adds r0, r4, 0
-	bl AnimateSprite
-	mov r0, r9
-	adds r1, r6, 0
-	adds r2, r7, 0
-	movs r3, 0x2
-	bl CreateSprite
-	lsls r0, 24
-	lsrs r0, 24
-	lsls r4, r0, 4
-	adds r4, r0
-	lsls r4, 2
-	ldr r0, =gSprites
-	adds r4, r0
-	mov r0, r8
-	strh r0, [r4, 0x2E]
-	ldrh r0, [r5, 0x2E]
-	adds r0, 0x1
-	strh r0, [r5, 0x2E]
-	adds r0, r4, 0
-	movs r1, 0x2
-	bl StartSpriteAnim
-	adds r0, r4, 0
-	bl AnimateSprite
-	mov r0, r9
-	mov r1, r10
-	adds r2, r7, 0
-	movs r3, 0x2
-	bl CreateSprite
-	lsls r0, 24
-	lsrs r0, 24
-	lsls r4, r0, 4
-	adds r4, r0
-	lsls r4, 2
-	ldr r0, =gSprites
-	adds r4, r0
-	mov r0, r8
-	strh r0, [r4, 0x2E]
-	ldrh r0, [r5, 0x2E]
-	adds r0, 0x1
-	strh r0, [r5, 0x2E]
-	adds r0, r4, 0
-	movs r1, 0x3
-	bl StartSpriteAnim
-	adds r0, r4, 0
-	bl AnimateSprite
-	mov r0, r8
-	pop {r3-r5}
-	mov r8, r3
-	mov r9, r4
-	mov r10, r5
-	pop {r4-r7}
-	pop {r1}
-	bx r1
-	.pool
-	thumb_func_end sub_807521C
-
-	thumb_func_start sub_8075370
-sub_8075370: @ 8075370
-	push {r4,lr}
-	adds r4, r0, 0
-	movs r1, 0x2E
-	ldrsh r0, [r4, r1]
-	cmp r0, 0
-	bne _080753A8
-	ldr r0, =gUnknown_0831C620
-	ldrh r0, [r0, 0x6]
-	bl FreeSpriteTilesByTag
-	ldr r0, =gUnknown_0831C628
-	ldrh r0, [r0, 0x4]
-	bl FreeSpritePaletteByTag
-	movs r1, 0x30
-	ldrsh r0, [r4, r1]
-	cmp r0, 0
-	bne _080753A4
-	adds r0, r4, 0
-	bl DestroySprite
-	b _080753A8
-	.pool
-_080753A4:
-	ldr r0, =SpriteCallbackDummy
-	str r0, [r4, 0x1C]
-_080753A8:
-	pop {r4}
-	pop {r0}
-	bx r0
-	.pool
-	thumb_func_end sub_8075370
-
-	thumb_func_start sub_80753B4
-sub_80753B4: @ 80753B4
-	push {lr}
-	adds r3, r0, 0
-	adds r0, 0x3F
-	ldrb r1, [r0]
-	movs r0, 0x10
-	ands r0, r1
-	cmp r0, 0
-	beq _080753DE
-	ldr r2, =gSprites
-	movs r0, 0x2E
-	ldrsh r1, [r3, r0]
-	lsls r0, r1, 4
-	adds r0, r1
-	lsls r0, 2
-	adds r0, r2
-	ldrh r1, [r0, 0x2E]
-	subs r1, 0x1
-	strh r1, [r0, 0x2E]
-	adds r0, r3, 0
-	bl DestroySprite
-_080753DE:
-	pop {r0}
-	bx r0
-	.pool
-	thumb_func_end sub_80753B4
-
-	.align 2, 0 @ Don't pad with nop.
diff --git a/include/data2.h b/include/data2.h
index be0f33ab8..df71f6e88 100644
--- a/include/data2.h
+++ b/include/data2.h
@@ -16,5 +16,9 @@ extern const u8 gSpeciesNames[][POKEMON_NAME_LENGTH + 1];
 extern const u8 gMoveNames[][13];
 extern const u8 gAbilityNames[][13];
 extern const u8 gTypeNames[][7];
+extern struct CompressedSpriteSheet gUnknown_0831C620;
+extern struct CompressedSpritePalette gUnknown_0831C628;
+extern const struct SpriteTemplate gUnknown_0831C688;
+
 
 #endif // GUARD_DATA2_H
diff --git a/ld_script.txt b/ld_script.txt
index bf52fc49f..e16a592cd 100644
--- a/ld_script.txt
+++ b/ld_script.txt
@@ -79,7 +79,7 @@ SECTIONS {
         src/daycare.o(.text);
         src/egg_hatch.o(.text);
         src/battle_interface.o(.text);
-        asm/smokescreen.o(.text);
+        src/smokescreen.o(.text);
         src/pokeball.o(.text);
         src/load_save.o(.text);
         asm/trade.o(.text);
diff --git a/src/smokescreen.c b/src/smokescreen.c
new file mode 100644
index 000000000..4b0e5d759
--- /dev/null
+++ b/src/smokescreen.c
@@ -0,0 +1,73 @@
+#include "global.h"
+#include "data2.h"
+#include "decompress.h"
+#include "sprite.h"
+#include "util.h"
+
+
+static void sub_8075370(struct Sprite *);
+
+
+u8 sub_807521C(s16 x, s16 y, u8 a3)
+{
+    u8 mainSpriteId;
+    u8 spriteId1, spriteId2, spriteId3, spriteId4;
+    struct Sprite *mainSprite;
+
+    if (GetSpriteTileStartByTag(gUnknown_0831C620.tag) == 0xFFFF)
+    {
+        LoadCompressedObjectPicUsingHeap(&gUnknown_0831C620);
+        LoadCompressedObjectPaletteUsingHeap(&gUnknown_0831C628);
+    }
+
+    mainSpriteId = CreateInvisibleSpriteWithCallback(sub_8075370);
+    mainSprite = &gSprites[mainSpriteId];
+    mainSprite->data[1] = a3;
+
+    spriteId1 = CreateSprite(&gUnknown_0831C688, x - 16, y - 16, 2);
+    gSprites[spriteId1].data[0] = mainSpriteId;
+    mainSprite->data[0]++;
+    AnimateSprite(&gSprites[spriteId1]);
+
+    spriteId2 = CreateSprite(&gUnknown_0831C688, x, y - 16, 2);
+    gSprites[spriteId2].data[0] = mainSpriteId;
+    mainSprite->data[0]++;
+    StartSpriteAnim(&gSprites[spriteId2], 1);
+    AnimateSprite(&gSprites[spriteId2]);
+
+    spriteId3 = CreateSprite(&gUnknown_0831C688, x - 16, y, 2);
+    gSprites[spriteId3].data[0] = mainSpriteId;
+    mainSprite->data[0]++;
+    StartSpriteAnim(&gSprites[spriteId3], 2);
+    AnimateSprite(&gSprites[spriteId3]);
+
+    spriteId4 = CreateSprite(&gUnknown_0831C688, x, y, 2);
+    gSprites[spriteId4].data[0] = mainSpriteId;
+    mainSprite->data[0]++;
+    StartSpriteAnim(&gSprites[spriteId4], 3);
+    AnimateSprite(&gSprites[spriteId4]);
+
+    return mainSpriteId;
+}
+
+static void sub_8075370(struct Sprite *sprite)
+{
+    if (!sprite->data[0])
+    {
+        FreeSpriteTilesByTag(gUnknown_0831C620.tag);
+        FreeSpritePaletteByTag(gUnknown_0831C628.tag);
+        if (!sprite->data[1])
+            DestroySprite(sprite);
+        else
+            sprite->callback = SpriteCallbackDummy;
+    }
+}
+
+void sub_80753B4(struct Sprite *sprite)
+{
+    if (sprite->animEnded)
+    {
+        gSprites[sprite->data[0]].data[0]--;
+        DestroySprite(sprite);
+    }
+}