diff --git a/asm/enemy/chuchuBoss.s b/asm/enemy/chuchuBoss.s
index 05e9fc10..5fc6c9a2 100644
--- a/asm/enemy/chuchuBoss.s
+++ b/asm/enemy/chuchuBoss.s
@@ -7,314 +7,6 @@
 	.text
 
 
-
-	thumb_func_start sub_080272D4
-sub_080272D4: @ 0x080272D4
-	push {r4, r5, r6, lr}
-	adds r6, r0, #0
-	ldr r0, [r6, #0x50]
-	ldrb r0, [r0, #0xd]
-	cmp r0, #0xc
-	bls _080272E2
-	b _08027532
-_080272E2:
-	lsls r0, r0, #2
-	ldr r1, _080272EC @ =_080272F0
-	adds r0, r0, r1
-	ldr r0, [r0]
-	mov pc, r0
-	.align 2, 0
-_080272EC: .4byte _080272F0
-_080272F0: @ jump table
-	.4byte _08027508 @ case 0
-	.4byte _08027324 @ case 1
-	.4byte _08027324 @ case 2
-	.4byte _08027332 @ case 3
-	.4byte _0802733E @ case 4
-	.4byte _08027332 @ case 5
-	.4byte _08027368 @ case 6
-	.4byte _08027532 @ case 7
-	.4byte _08027346 @ case 8
-	.4byte _08027454 @ case 9
-	.4byte _0802748C @ case 10
-	.4byte _08027532 @ case 11
-	.4byte _08027324 @ case 12
-_08027324:
-	adds r1, r6, #0
-	adds r1, #0x7a
-	movs r0, #0xa0
-	strh r0, [r1]
-	subs r1, #4
-	strh r0, [r1]
-	b _0802733E
-_08027332:
-	adds r0, r6, #0
-	adds r0, #0x83
-	ldrb r0, [r0]
-	cmp r0, #0
-	bne _0802733E
-	b _08027532
-_0802733E:
-	adds r0, r6, #0
-	bl sub_0802757C
-	b _08027532
-_08027346:
-	ldrb r0, [r6, #0xf]
-	cmp r0, #2
-	bls _0802734E
-	b _08027532
-_0802734E:
-	adds r0, r6, #0
-	bl sub_0802757C
-	adds r0, r6, #0
-	adds r0, #0x83
-	ldrb r0, [r0]
-	cmp r0, #0
-	beq _08027360
-	b _08027532
-_08027360:
-	ldrb r0, [r6, #0xf]
-	adds r0, #1
-	strb r0, [r6, #0xf]
-	b _08027532
-_08027368:
-	ldr r5, [r6, #0x48]
-	adds r0, r6, #0
-	adds r0, #0x7a
-	ldrh r1, [r0]
-	movs r4, #0x80
-	lsls r4, r4, #9
-	adds r0, r4, #0
-	bl __divsi3
-	lsls r1, r0, #3
-	adds r1, r1, r0
-	lsrs r1, r1, #7
-	strb r1, [r5, #6]
-	ldr r5, [r6, #0x48]
-	adds r0, r6, #0
-	adds r0, #0x76
-	ldrh r1, [r0]
-	adds r0, r4, #0
-	bl __divsi3
-	lsls r1, r0, #2
-	adds r1, r1, r0
-	lsrs r1, r1, #6
-	strb r1, [r5, #7]
-	adds r0, r6, #0
-	adds r0, #0x84
-	ldrb r0, [r0]
-	cmp r0, #0
-	bne _080273A4
-	b _08027532
-_080273A4:
-	adds r0, r6, #0
-	adds r0, #0x41
-	ldrb r1, [r0]
-	movs r0, #0x80
-	ands r0, r1
-	cmp r0, #0
-	beq _08027444
-	adds r2, r6, #0
-	adds r2, #0x3d
-	ldrb r1, [r2]
-	movs r0, #0
-	ldrsb r0, [r2, r0]
-	cmp r0, #0
-	beq _08027444
-	ldr r0, [r6, #0x54]
-	ldr r0, [r0, #0x68]
-	adds r0, #0x3d
-	strb r1, [r0]
-	ldr r0, [r6, #0x54]
-	ldr r0, [r0, #0x50]
-	ldrb r1, [r2]
-	adds r0, #0x3d
-	strb r1, [r0]
-	ldr r0, [r6, #0x54]
-	ldrb r1, [r2]
-	adds r0, #0x3d
-	strb r1, [r0]
-	ldr r0, [r6, #0x54]
-	bl sub_08027D20
-	adds r2, r0, #0
-	cmp r2, #0
-	beq _08027406
-	ldrh r0, [r6, #0x2e]
-	adds r0, #1
-	strh r0, [r2, #0x2e]
-	adds r0, r6, #0
-	adds r0, #0x63
-	ldrb r0, [r0]
-	adds r0, #0x20
-	adds r1, r2, #0
-	adds r1, #0x63
-	strb r0, [r1]
-	adds r0, r6, #0
-	adds r0, #0x62
-	ldrb r1, [r0]
-	adds r0, r2, #0
-	adds r0, #0x62
-	strb r1, [r0]
-_08027406:
-	ldr r0, [r6, #0x54]
-	bl sub_08027C54
-	cmp r0, #0
-	beq _0802741C
-	ldr r0, [r6, #0x54]
-	adds r0, #0x84
-	ldr r0, [r0]
-	ldrb r0, [r0, #4]
-	cmp r0, #2
-	beq _08027428
-_0802741C:
-	ldr r0, _08027424 @ =0x00000127
-	bl SoundReq
-	b _08027444
-	.align 2, 0
-_08027424: .4byte 0x00000127
-_08027428:
-	bl sub_08078B48
-	ldr r0, _0802744C @ =gRoomControls
-	ldr r2, [r6, #0x54]
-	str r2, [r0, #0x30]
-	ldr r1, _08027450 @ =gPauseMenuOptions
-	movs r0, #1
-	strb r0, [r1]
-	movs r0, #9
-	strb r0, [r2, #0xd]
-	movs r0, #0x94
-	lsls r0, r0, #1
-	bl SoundReq
-_08027444:
-	adds r0, r6, #0
-	bl sub_08027A60
-	b _08027484
-	.align 2, 0
-_0802744C: .4byte gRoomControls
-_08027450: .4byte gPauseMenuOptions
-_08027454:
-	ldr r5, [r6, #0x48]
-	adds r0, r6, #0
-	adds r0, #0x7a
-	ldrh r1, [r0]
-	movs r4, #0x80
-	lsls r4, r4, #9
-	adds r0, r4, #0
-	bl __divsi3
-	lsls r1, r0, #3
-	adds r1, r1, r0
-	lsrs r1, r1, #7
-	strb r1, [r5, #6]
-	ldr r5, [r6, #0x48]
-	adds r0, r6, #0
-	adds r0, #0x76
-	ldrh r1, [r0]
-	adds r0, r4, #0
-	bl __divsi3
-	lsls r1, r0, #2
-	adds r1, r1, r0
-	lsrs r1, r1, #6
-	strb r1, [r5, #7]
-_08027484:
-	adds r0, r6, #0
-	bl sub_0800445C
-	b _08027532
-_0802748C:
-	adds r2, r6, #0
-	adds r2, #0x7d
-	ldrb r0, [r2]
-	cmp r0, #0
-	bne _0802749E
-	adds r0, r6, #0
-	bl sub_0802757C
-	b _080274AE
-_0802749E:
-	adds r1, r6, #0
-	adds r1, #0x84
-	ldrb r0, [r1]
-	cmp r0, #0
-	beq _080274AE
-	movs r0, #0
-	strb r0, [r2]
-	strb r0, [r1]
-_080274AE:
-	adds r2, r6, #0
-	adds r2, #0x83
-	adds r0, r6, #0
-	adds r0, #0x81
-	ldrb r1, [r0]
-	lsrs r0, r1, #1
-	ldrb r2, [r2]
-	adds r0, r2, r0
-	lsls r0, r0, #0x18
-	lsrs r0, r0, #0x18
-	cmp r0, r1
-	bls _080274F4
-	lsls r0, r2, #0x18
-	cmp r0, #0
-	ble _080274E0
-	adds r0, r6, #0
-	adds r0, #0x58
-	ldrb r0, [r0]
-	cmp r0, #0xc
-	beq _08027532
-	adds r0, r6, #0
-	movs r1, #0xc
-	bl InitAnimationForceUpdate
-	b _08027532
-_080274E0:
-	adds r0, r6, #0
-	adds r0, #0x58
-	ldrb r0, [r0]
-	cmp r0, #0xb
-	beq _08027532
-	adds r0, r6, #0
-	movs r1, #0xb
-	bl InitAnimationForceUpdate
-	b _08027532
-_080274F4:
-	adds r0, r6, #0
-	adds r0, #0x58
-	ldrb r0, [r0]
-	cmp r0, #0xa
-	beq _08027532
-	adds r0, r6, #0
-	movs r1, #0xa
-	bl InitAnimationForceUpdate
-	b _08027532
-_08027508:
-	ldr r0, [r6, #0x54]
-	adds r0, #0x84
-	ldr r0, [r0]
-	ldrb r0, [r0, #3]
-	cmp r0, #8
-	bne _08027532
-	adds r0, r6, #0
-	bl sub_0802757C
-	adds r0, r6, #0
-	adds r0, #0x7d
-	ldrb r0, [r0]
-	cmp r0, #1
-	bne _08027532
-	adds r1, r6, #0
-	adds r1, #0x81
-	ldrb r0, [r1]
-	cmp r0, #0
-	beq _08027532
-	subs r0, #4
-	strb r0, [r1]
-_08027532:
-	ldr r0, [r6, #0x50]
-	ldr r0, [r0, #0x34]
-	str r0, [r6, #0x34]
-	adds r1, r6, #0
-	adds r1, #0x41
-	movs r0, #0
-	strb r0, [r1]
-	adds r0, r6, #0
-	bl UpdateAnimationSingleFrame
-	pop {r4, r5, r6, pc}
-
 	thumb_func_start sub_08027548
 sub_08027548: @ 0x08027548
 	push {r4, r5, r6, lr}
diff --git a/src/enemy/chuchuBoss.c b/src/enemy/chuchuBoss.c
index 1f043ae8..247cbfd4 100644
--- a/src/enemy/chuchuBoss.c
+++ b/src/enemy/chuchuBoss.c
@@ -127,7 +127,7 @@ void sub_08027BBC();
 bool32 sub_08027C54();
 void sub_08027C7C(ChuchuBossEntity*, u32);
 void sub_08027C9C();
-void sub_08027D20();
+Entity* sub_08027D20();
 
 // clang-format off
 void (*const ChuchuBoss_Functions[])(ChuchuBossEntity*) = {
@@ -1306,3 +1306,102 @@ void sub_0802720C(ChuchuBossEntity* this) {
     }
     super->z.WORD = super->parent->z.WORD;
 }
+
+void sub_080272D4(ChuchuBossEntity* this) {
+    Entity* pEVar3;
+    u8 temp;
+
+    switch (super->parent->subAction) {
+        case 1:
+        case 2:
+        case 12:
+            this->unk_78.HALF.HI = 0xa0;
+            this->unk_74.HALF.HI = 0xa0;
+            sub_0802757C(this);
+            break;
+        case 3:
+        case 5:
+            if (this->unk_82.HALF.HI == 0)
+                break;
+        case 4:
+            sub_0802757C(this);
+            break;
+        case 8:
+            if (super->subtimer < 3) {
+                sub_0802757C(this);
+                if (this->unk_82.HALF.HI == 0) {
+                    super->subtimer++;
+                }
+            }
+            break;
+        case 6:
+            super->hitbox->width = (u32)((0x10000 / this->unk_78.HALF_U.HI) * 9) >> 7;
+            super->hitbox->height = (u32)((0x10000 / this->unk_74.HALF_U.HI) * 5) >> 6;
+            if (*(char*)&this->unk_84 == 0)
+                break;
+            if ((super->contactFlags & 0x80) != 0) {
+                if (super->iframes != 0) {
+                    ((ChuchuBossEntity*)super->child)->unk_68->base.iframes = super->iframes;
+                    super->child->parent->iframes = super->iframes;
+                    super->child->iframes = super->iframes;
+                    pEVar3 = sub_08027D20(super->child);
+                    if (pEVar3 != NULL) {
+                        pEVar3->x.HALF.HI = super->x.HALF.HI + 1;
+                        pEVar3->spriteOffsetY = super->spriteOffsetY + 0x20;
+                        pEVar3->spriteOffsetX = super->spriteOffsetX;
+                    }
+                    if (sub_08027C54(super->child) == 0 || ((ChuchuBossEntity*)super->child)->unk_84->unk_04 != 2) {
+                        SoundReq(SFX_BOSS_HIT);
+                    } else {
+                        sub_08078B48();
+                        gRoomControls.camera_target = super->child;
+                        gPauseMenuOptions.disabled = 1;
+                        gRoomControls.camera_target->subAction = 9;
+                        SoundReq(SFX_BOSS_DIE);
+                    }
+                }
+            }
+            sub_08027A60(this);
+            sub_0800445C(super);
+            break;
+
+        case 9:
+            super->hitbox->width = (u32)((0x10000 / this->unk_78.HALF_U.HI) * 9) >> 7;
+            super->hitbox->height = (u32)((0x10000 / this->unk_74.HALF_U.HI) * 5) >> 6;
+            sub_0800445C(super);
+            break;
+        case 10:
+            if (this->unk_7d == 0) {
+                sub_0802757C(this);
+            } else if (*(char*)&this->unk_84 != 0) {
+                this->unk_7d = 0;
+                *(char*)&this->unk_84 = 0;
+            }
+            temp = this->unk_82.HALF.HI + (this->unk_81 / 2);
+            if ((temp) > (u32)this->unk_81) {
+                if ((s8)this->unk_82.HALF.HI > 0) {
+                    if (super->animIndex != 12) {
+                        InitAnimationForceUpdate(super, 12);
+                    }
+                } else if (super->animIndex != 11) {
+                    InitAnimationForceUpdate(super, 11);
+                }
+            } else if (super->animIndex != 10) {
+                InitAnimationForceUpdate(super, 10);
+            }
+            break;
+        case 0:
+            if (((ChuchuBossEntity*)super->child)->unk_84->unk_03 == 8) {
+                sub_0802757C(this);
+                if (this->unk_7d == 1) {
+                    if (this->unk_81 != 0) {
+                        this->unk_81 -= 4;
+                    }
+                }
+            }
+            break;
+    }
+    super->z.WORD = super->parent->z.WORD;
+    super->contactFlags = 0;
+    UpdateAnimationSingleFrame(super);
+}