diff --git a/asm/kinstone.s b/asm/kinstone.s
index ad29bd8e..e99455cb 100644
--- a/asm/kinstone.s
+++ b/asm/kinstone.s
@@ -755,52 +755,3 @@ _08018A8A:
 	.align 2, 0
 _08018AAC: .4byte gUnk_080FE320
 _08018AB0: .4byte 0x00000232
-
-	thumb_func_start sub_08018AB4
-sub_08018AB4: @ 0x08018AB4
-	push {r4, r5, r6, r7, lr}
-	mov r7, sb
-	mov r6, r8
-	push {r6, r7}
-	sub sp, #4
-	adds r5, r0, #0
-	movs r3, #0xf4
-	lsls r3, r3, #1
-	movs r7, #0xfa
-	lsls r7, r7, #1
-	movs r0, #0
-_08018ACA:
-	movs r6, #0
-	movs r1, #0x40
-	adds r1, r1, r5
-	mov r8, r1
-	adds r0, #1
-	mov sb, r0
-	adds r4, r5, #0
-	subs r4, #0x40
-_08018ADA:
-	adds r0, r3, #0
-	adds r3, #1
-	adds r1, r5, r6
-	movs r2, #1
-	str r3, [sp]
-	bl SetTileType
-	adds r0, r7, #0
-	adds r7, #1
-	adds r1, r4, #0
-	movs r2, #2
-	bl SetTileType
-	adds r4, #1
-	adds r6, #1
-	ldr r3, [sp]
-	cmp r6, #3
-	bls _08018ADA
-	mov r5, r8
-	mov r0, sb
-	cmp r0, #2
-	bls _08018ACA
-	add sp, #4
-	pop {r3, r4}
-	mov r8, r3
-	mov sb, r4
-	pop {r4, r5, r6, r7, pc}
diff --git a/src/kinstone.c b/src/kinstone.c
index f1600ba4..5d0cceef 100644
--- a/src/kinstone.c
+++ b/src/kinstone.c
@@ -4,6 +4,25 @@
 #include "common.h"
 #include "flags.h"
 
+void sub_08018AB4(int param_1) {
+    u32 i;
+    int iVar2;
+    u32 j;
+    int iVar6;
+
+    iVar2 = 0x1e8;
+    iVar6 = 500;
+
+    for (i = 0; i < 3; i++) {
+        j = 0;
+        for (; j < 4; j++) {
+            SetTileType(iVar2++, param_1 + j, 1);
+            SetTileType(iVar6++, param_1 - 0x40 + j, 2);
+        }
+        param_1 += 0x40;
+    }
+}
+
 void sub_08018B10(int param_1) {
     int iVar1;
     u32 index;