diff --git a/asm/enemy/chuchuBoss.s b/asm/enemy/chuchuBoss.s
index aa715def..d12220d7 100644
--- a/asm/enemy/chuchuBoss.s
+++ b/asm/enemy/chuchuBoss.s
@@ -15,132 +15,6 @@
 
 
 
-	thumb_func_start sub_08027AA4
-sub_08027AA4: @ 0x08027AA4
-	push {r4, r5, lr}
-	adds r5, r0, #0
-	adds r0, #0x41
-	ldrb r1, [r0]
-	movs r0, #0x80
-	ands r0, r1
-	cmp r0, #0
-	beq _08027B94
-	movs r0, #0x7f
-	ands r0, r1
-	cmp r0, #0x13
-	beq _08027AC2
-	cmp r0, #0x1b
-	beq _08027B44
-	b _08027B94
-_08027AC2:
-	movs r0, #0x84
-	bl SoundReq
-	ldrb r3, [r5, #0xb]
-	adds r0, r5, #0
-	movs r1, #0x49
-	movs r2, #9
-	bl CreateObjectWithParent
-	ldr r0, _08027B3C @ =0x00000155
-	bl SoundReq
-	adds r0, r5, #0
-	adds r0, #0x84
-	ldr r4, [r0]
-	adds r1, r5, #0
-	adds r1, #0x3d
-	movs r0, #3
-	strb r0, [r1]
-	ldrb r0, [r4, #6]
-	adds r0, #1
-	strb r0, [r4, #6]
-	ldrb r0, [r4, #6]
-	movs r1, #3
-	bl __divsi3
-	adds r1, r0, #0
-	lsls r0, r1, #0x18
-	lsrs r0, r0, #0x15
-	ldrb r2, [r4, #5]
-	cmp r0, r2
-	beq _08027B06
-	lsls r0, r1, #3
-	strb r0, [r4, #5]
-_08027B06:
-	movs r0, #0xb4
-	str r0, [r4, #8]
-	movs r0, #5
-	ldrsb r0, [r4, r0]
-	cmp r0, #0
-	bge _08027B94
-	movs r0, #0x40
-	strb r0, [r4, #1]
-	adds r1, r5, #0
-	adds r1, #0x3f
-	movs r0, #0
-	strb r0, [r1]
-	ldrb r0, [r5, #0xd]
-	cmp r0, #2
-	bne _08027B2A
-	adds r0, r5, #0
-	bl sub_08027BBC
-_08027B2A:
-	adds r0, r5, #0
-	bl sub_08027D20
-	ldr r0, _08027B40 @ =0x00000127
-	bl SoundReq
-_08027B36:
-	movs r0, #1
-	b _08027B96
-	.align 2, 0
-_08027B3C: .4byte 0x00000155
-_08027B40: .4byte 0x00000127
-_08027B44:
-	adds r1, r5, #0
-	adds r1, #0x3d
-	movs r0, #0xe2
-	strb r0, [r1]
-	ldr r0, [r5, #0x4c]
-	ldrb r0, [r0, #0xa]
-	adds r0, #1
-	cmp r0, #2
-	beq _08027B74
-	cmp r0, #2
-	bgt _08027B60
-	cmp r0, #1
-	beq _08027B84
-	b _08027B36
-_08027B60:
-	cmp r0, #3
-	bne _08027B36
-	adds r1, r5, #0
-	adds r1, #0x42
-	movs r0, #0x1a
-	strb r0, [r1]
-	adds r1, #4
-	movs r0, #0xe0
-	lsls r0, r0, #1
-	b _08027B90
-_08027B74:
-	adds r1, r5, #0
-	adds r1, #0x42
-	movs r0, #0x14
-	strb r0, [r1]
-	adds r1, #4
-	movs r0, #0xc0
-	lsls r0, r0, #1
-	b _08027B90
-_08027B84:
-	adds r1, r5, #0
-	adds r1, #0x42
-	movs r0, #0x10
-	strb r0, [r1]
-	adds r1, #4
-	adds r0, #0xf0
-_08027B90:
-	strh r0, [r1]
-	b _08027B36
-_08027B94:
-	movs r0, #0
-_08027B96:
-	pop {r4, r5, pc}
 
 	thumb_func_start sub_08027B98
 sub_08027B98: @ 0x08027B98
diff --git a/src/enemy/chuchuBoss.c b/src/enemy/chuchuBoss.c
index 8595feef..db04b2ec 100644
--- a/src/enemy/chuchuBoss.c
+++ b/src/enemy/chuchuBoss.c
@@ -1690,3 +1690,57 @@ void sub_08027A60(ChuchuBossEntity* this) {
         this->unk_7c = (this->unk_7c & 0x80) ^ 0x80;
     }
 }
+
+bool32 sub_08027AA4(ChuchuBossEntity* this) {
+    u32 uVar3;
+    s32 iVar4;
+    Helper* pHelper;
+
+    if ((super->contactFlags & 0x80) == 0) {
+        return FALSE;
+    }
+    switch (super->contactFlags & 0x7f) {
+        case 19:
+            SoundReq(SFX_WATER_SPLASH);
+            CreateObjectWithParent(super, OBJECT_49, 9, super->type2);
+            SoundReq(SFX_155);
+            pHelper = this->unk_84;
+            super->iframes = 3;
+            pHelper->unk_06++;
+            iVar4 = pHelper->unk_06;
+            uVar3 = (iVar4 / 3);
+            if (((u8)uVar3 << 3) != (u8)pHelper->unk_05) {
+                pHelper->unk_05 = (uVar3 << 3);
+            }
+            pHelper->unk_08 = 0xb4;
+            if (-1 < pHelper->unk_05) {
+                break;
+            }
+            pHelper->unk_01 = 0x40;
+            super->hitType = 0;
+            if (super->subAction == 2) {
+                sub_08027BBC(this);
+            }
+            sub_08027D20(this);
+            SoundReq(SFX_BOSS_HIT);
+            return TRUE;
+        case 27:
+            super->iframes = -30;
+            switch (super->contactedEntity->type + 1) {
+                case 3:
+                    super->knockbackDuration = 26;
+                    super->knockbackSpeed = Q_8_8(1.75);
+                    break;
+                case 2:
+                    super->knockbackDuration = 20;
+                    super->knockbackSpeed = Q_8_8(1.5);
+                    break;
+                case 1:
+                    super->knockbackDuration = 16;
+                    super->knockbackSpeed = Q_8_8(1);
+                    break;
+            }
+            return TRUE;
+    }
+    return FALSE;
+}