diff --git a/asm/ground_effect.s b/asm/ground_effect.s
index 1c501e18b..88c6350c7 100644
--- a/asm/ground_effect.s
+++ b/asm/ground_effect.s
@@ -5,69 +5,6 @@
 
 	.text
 
-	thumb_func_start GroundEffect_CancelBlank
-GroundEffect_CancelBlank:
-	push {r4-r7,lr}
-	mov r7, r8
-	push {r7}
-	sub sp, 0x8
-	ldr r1, _080ACD7C
-	movs r0, 0
-	bl Log
-	movs r6, 0
-	ldr r0, _080ACD80
-	ldr r4, [r0]
-	movs r0, 0x1
-	negs r0, r0
-	mov r8, r0
-	movs r1, 0x92
-	lsls r1, 1
-	adds r5, r4, r1
-	mov r7, sp
-_080ACD2C:
-	movs r1, 0x6
-	ldrsh r0, [r4, r1]
-	cmp r0, r8
-	beq _080ACD5C
-	ldr r0, [r5]
-	ldr r1, [r4, 0x14]
-	adds r0, r1
-	str r0, [sp]
-	ldr r0, [r5, 0x4]
-	ldr r1, [r4, 0x18]
-	adds r0, r1
-	str r0, [r7, 0x4]
-	movs r1, 0xA2
-	lsls r1, 1
-	adds r0, r4, r1
-	mov r1, sp
-	bl IsOnscreen_80A675C
-	lsls r0, 24
-	cmp r0, 0
-	bne _080ACD5C
-	adds r0, r6, 0
-	bl GroundEffect_Delete
-_080ACD5C:
-	adds r0, r6, 0x1
-	lsls r0, 16
-	asrs r6, r0, 16
-	movs r0, 0xE2
-	lsls r0, 1
-	adds r5, r0
-	adds r4, r0
-	cmp r6, 0xF
-	ble _080ACD2C
-	add sp, 0x8
-	pop {r3}
-	mov r8, r3
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_080ACD7C: .4byte gUnknown_8118658
-_080ACD80: .4byte gGroundEffects
-	thumb_func_end GroundEffect_CancelBlank
-
 	thumb_func_start sub_80ACD84
 sub_80ACD84:
 	push {r4-r7,lr}
diff --git a/src/ground_effect.c b/src/ground_effect.c
index 337a74de3..0b02de4cf 100644
--- a/src/ground_effect.c
+++ b/src/ground_effect.c
@@ -1,5 +1,6 @@
 #include "global.h"
 #include "ground_script.h"
+#include "ground_sprite.h"
 #include "debug.h"
 #include "memory.h"
 
@@ -11,7 +12,13 @@ typedef struct GroundEffect {
     s16 unk6;
     s16 unk8;
     s8 unkA;
-    u8 fillB[0x1c4 - 0xB];
+    u8 fillB[0x14 - 0xB];
+    s32 unk14; // some x?
+    s32 unk18; // some y?
+    u8 fill1C[0x124 - 0x1C];
+    PixelPos unkPixelPos; // 0x124
+    u8 fill12C[0x144 - 0x12C];
+    struct UnkGroundSpriteStruct unk144;
 } GroundEffect;
 
 IWRAM_INIT GroundEffect* gGroundEffects = NULL;  // size 16 array
@@ -100,7 +107,7 @@ void GroundEffect_Cancel(s32 scriptID, s32 sector)
 
     index = 0;
     ptr = &gGroundEffects[0];
-    for(; index < 0x10; index = (s16)(index + 1), ptr++)
+    for(; index < 16; index = (s16)(index + 1), ptr++)
     {
         if((ptr->unk6 != -1) && (ptr->unk8 == scriptID_s32))
             if(sector_s32 < 0 || ptr->unkA == sector_s32)
@@ -108,3 +115,28 @@ void GroundEffect_Cancel(s32 scriptID, s32 sector)
     }
 }
 
+extern const char gUnknown_8118658[];
+
+void GroundEffect_CancelBlank()
+{
+    s32 index;
+    GroundEffect *ptr;
+    PixelPos pos;
+
+    Log(0, gUnknown_8118658); // "GroundEffect CancelBlank"
+
+    index = 0;
+    ptr = &gGroundEffects[0];
+    for (; index < 16; index = (s16)(index + 1), ptr++)
+    {
+        if (ptr->unk6 != -1)
+        {
+            pos.x = ptr->unkPixelPos.x + ptr->unk14;
+            pos.y = ptr->unkPixelPos.y + ptr->unk18;
+            if (!IsOnscreen_80A675C(&ptr->unk144, &pos))
+            {
+                GroundEffect_Delete(index);
+            }
+        }
+    }
+}