diff --git a/asm/object/objectB4.s b/asm/object/objectB4.s
deleted file mode 100644
index 27adbace..00000000
--- a/asm/object/objectB4.s
+++ /dev/null
@@ -1,352 +0,0 @@
-	.include "asm/macros.inc"
-
-	.include "constants/constants.inc"
-
-	.syntax unified
-
-	.text
-
-
-	thumb_func_start ObjectB4
-ObjectB4: @ 0x080A0B90
-	push {lr}
-	ldr r2, _080A0BA4 @ =gUnk_08124B20
-	ldrb r1, [r0, #0xa]
-	lsls r1, r1, #2
-	adds r1, r1, r2
-	ldr r1, [r1]
-	bl _call_via_r1
-	pop {pc}
-	.align 2, 0
-_080A0BA4: .4byte gUnk_08124B20
-
-	thumb_func_start sub_080A0BA8
-sub_080A0BA8: @ 0x080A0BA8
-	push {r4, r5, lr}
-	adds r5, r0, #0
-	ldrb r2, [r5, #0xc]
-	cmp r2, #0
-	beq _080A0BB8
-	cmp r2, #1
-	beq _080A0C08
-	b _080A0CE0
-_080A0BB8:
-	movs r0, #1
-	strb r0, [r5, #0xc]
-	ldrb r1, [r5, #0x18]
-	subs r0, #5
-	ands r0, r1
-	movs r1, #2
-	orrs r0, r1
-	strb r0, [r5, #0x18]
-	movs r0, #9
-	strb r0, [r5, #0x1e]
-	movs r0, #8
-	strb r0, [r5, #0xe]
-	strb r2, [r5, #0xf]
-	ldrb r1, [r5, #0x19]
-	movs r2, #0x3f
-	adds r0, r2, #0
-	ands r0, r1
-	movs r3, #0x40
-	orrs r0, r3
-	strb r0, [r5, #0x19]
-	adds r4, r5, #0
-	adds r4, #0x29
-	ldrb r1, [r4]
-	movs r0, #8
-	rsbs r0, r0, #0
-	ands r0, r1
-	movs r1, #4
-	orrs r0, r1
-	strb r0, [r4]
-	ldrb r0, [r5, #0x1b]
-	ands r2, r0
-	orrs r2, r3
-	strb r2, [r5, #0x1b]
-	adds r0, r5, #0
-	movs r1, #0xbf
-	movs r2, #0x48
-	movs r3, #0x1e
-	bl sub_0806FB00
-	b _080A0CE0
-_080A0C08:
-	ldrb r0, [r5, #0xf]
-	cmp r0, #6
-	bhi _080A0C46
-	ldrb r0, [r5, #0xe]
-	subs r0, #1
-	strb r0, [r5, #0xe]
-	lsls r0, r0, #0x18
-	cmp r0, #0
-	bne _080A0C46
-	strb r2, [r5, #0xe]
-	ldrb r2, [r5, #0xf]
-	movs r0, #0xb4
-	movs r1, #1
-	bl CreateObject
-	adds r4, r0, #0
-	cmp r4, #0
-	beq _080A0C40
-	adds r0, r5, #0
-	adds r1, r4, #0
-	bl CopyPosition
-	movs r0, #0x68
-	strh r0, [r4, #0x32]
-	adds r0, r5, #0
-	adds r1, r4, #0
-	bl SortEntityBelow
-_080A0C40:
-	ldrb r0, [r5, #0xf]
-	adds r0, #1
-	strb r0, [r5, #0xf]
-_080A0C46:
-	adds r0, r5, #0
-	bl sub_0806FB38
-	cmp r0, #0
-	bne _080A0C58
-	ldr r0, _080A0CE4 @ =gMenu
-	ldrb r0, [r0, #5]
-	cmp r0, #1
-	bls _080A0CE0
-_080A0C58:
-	movs r0, #0xbf
-	strh r0, [r5, #0x2e]
-	movs r0, #0x48
-	strh r0, [r5, #0x32]
-	movs r0, #0xa
-	strb r0, [r5, #0x1e]
-	movs r0, #2
-	strb r0, [r5, #0xc]
-	ldrb r0, [r5, #0xf]
-	cmp r0, #6
-	bhi _080A0CA0
-_080A0C6E:
-	ldrb r2, [r5, #0xf]
-	movs r0, #0xb4
-	movs r1, #1
-	bl CreateObject
-	adds r4, r0, #0
-	cmp r4, #0
-	beq _080A0C92
-	adds r0, r5, #0
-	adds r1, r4, #0
-	bl CopyPosition
-	movs r0, #0x68
-	strh r0, [r4, #0x32]
-	adds r0, r5, #0
-	adds r1, r4, #0
-	bl SortEntityBelow
-_080A0C92:
-	ldrb r0, [r5, #0xf]
-	adds r0, #1
-	strb r0, [r5, #0xf]
-	lsls r0, r0, #0x18
-	lsrs r0, r0, #0x18
-	cmp r0, #6
-	bls _080A0C6E
-_080A0CA0:
-	movs r0, #0xb4
-	movs r1, #2
-	movs r2, #0
-	bl CreateObject
-	adds r4, r0, #0
-	cmp r4, #0
-	beq _080A0CC0
-	movs r0, #0xc4
-	strh r0, [r4, #0x2e]
-	movs r0, #0x2c
-	strh r0, [r4, #0x32]
-	adds r0, r5, #0
-	adds r1, r4, #0
-	bl SortEntityAbove
-_080A0CC0:
-	movs r0, #0xb4
-	movs r1, #3
-	movs r2, #0
-	bl CreateObject
-	adds r4, r0, #0
-	cmp r4, #0
-	beq _080A0CE0
-	movs r0, #0xb4
-	strh r0, [r4, #0x2e]
-	movs r0, #0x19
-	strh r0, [r4, #0x32]
-	adds r0, r5, #0
-	adds r1, r4, #0
-	bl SortEntityAbove
-_080A0CE0:
-	pop {r4, r5, pc}
-	.align 2, 0
-_080A0CE4: .4byte gMenu
-
-	thumb_func_start sub_080A0CE8
-sub_080A0CE8: @ 0x080A0CE8
-	push {r4, lr}
-	adds r4, r0, #0
-	ldrb r0, [r4, #0xc]
-	cmp r0, #0
-	beq _080A0CF8
-	cmp r0, #1
-	beq _080A0D28
-	b _080A0D66
-_080A0CF8:
-	movs r0, #1
-	strb r0, [r4, #0xc]
-	ldrb r1, [r4, #0x18]
-	subs r0, #5
-	ands r0, r1
-	movs r1, #2
-	orrs r0, r1
-	strb r0, [r4, #0x18]
-	ldrb r0, [r4, #0xb]
-	adds r0, #2
-	strb r0, [r4, #0x1e]
-	ldr r1, _080A0D24 @ =gUnk_08124B10
-	ldrb r0, [r4, #0xb]
-	lsls r0, r0, #1
-	adds r0, r0, r1
-	ldrh r1, [r0]
-	adds r0, r4, #0
-	movs r2, #0x68
-	movs r3, #0x14
-	bl sub_0806FB00
-	b _080A0D66
-	.align 2, 0
-_080A0D24: .4byte gUnk_08124B10
-_080A0D28:
-	adds r0, r4, #0
-	bl sub_0806FB38
-	cmp r0, #0
-	bne _080A0D3A
-	ldr r0, _080A0D68 @ =gMenu
-	ldrb r0, [r0, #5]
-	cmp r0, #1
-	bls _080A0D66
-_080A0D3A:
-	ldr r1, _080A0D6C @ =gUnk_08124B10
-	ldrb r0, [r4, #0xb]
-	lsls r0, r0, #1
-	adds r0, r0, r1
-	ldrh r0, [r0]
-	strh r0, [r4, #0x2e]
-	movs r0, #0x68
-	strh r0, [r4, #0x32]
-	ldrb r1, [r4, #0xb]
-	movs r0, #7
-	subs r1, r0, r1
-	adds r3, r4, #0
-	adds r3, #0x29
-	ands r1, r0
-	ldrb r2, [r3]
-	movs r0, #8
-	rsbs r0, r0, #0
-	ands r0, r2
-	orrs r0, r1
-	strb r0, [r3]
-	movs r0, #2
-	strb r0, [r4, #0xc]
-_080A0D66:
-	pop {r4, pc}
-	.align 2, 0
-_080A0D68: .4byte gMenu
-_080A0D6C: .4byte gUnk_08124B10
-
-	thumb_func_start sub_080A0D70
-sub_080A0D70: @ 0x080A0D70
-	push {r4, r5, r6, lr}
-	adds r5, r0, #0
-	ldrb r6, [r5, #0xc]
-	cmp r6, #0
-	bne _080A0DC4
-	movs r0, #1
-	strb r0, [r5, #0xc]
-	ldrb r1, [r5, #0x18]
-	subs r0, #5
-	ands r0, r1
-	movs r1, #2
-	orrs r0, r1
-	strb r0, [r5, #0x18]
-	ldrb r2, [r5, #0x19]
-	movs r4, #0x3f
-	movs r1, #0x3f
-	adds r0, r1, #0
-	ands r0, r2
-	movs r3, #0x40
-	orrs r0, r3
-	strb r0, [r5, #0x19]
-	movs r0, #0x29
-	adds r0, r0, r5
-	mov ip, r0
-	ldrb r2, [r0]
-	movs r0, #8
-	rsbs r0, r0, #0
-	ands r0, r2
-	mov r2, ip
-	strb r0, [r2]
-	ldrb r0, [r5, #0x1b]
-	ands r1, r0
-	orrs r1, r3
-	strb r1, [r5, #0x1b]
-	movs r0, #0xb
-	strb r0, [r5, #0x1e]
-	bl Random
-	ands r0, r4
-	adds r0, #0x40
-	strb r0, [r5, #0xe]
-	strb r6, [r5, #0xf]
-_080A0DC4:
-	ldrb r0, [r5, #0xe]
-	subs r0, #1
-	strb r0, [r5, #0xe]
-	lsls r0, r0, #0x18
-	lsrs r4, r0, #0x18
-	cmp r4, #0
-	bne _080A0E02
-	movs r0, #4
-	strb r0, [r5, #0xe]
-	ldr r2, _080A0E04 @ =gUnk_08124B30
-	ldrb r0, [r5, #0xf]
-	adds r1, r0, #1
-	strb r1, [r5, #0xf]
-	lsls r0, r0, #0x18
-	lsrs r0, r0, #0x18
-	adds r0, r0, r2
-	ldrb r0, [r0]
-	adds r0, #2
-	strb r0, [r5, #0x1e]
-	ldrb r0, [r5, #0xf]
-	adds r0, r0, r2
-	ldrb r0, [r0]
-	cmp r0, #0xff
-	bne _080A0E02
-	bl Random
-	movs r1, #0x3f
-	ands r0, r1
-	adds r0, #0x40
-	strb r0, [r5, #0xe]
-	strb r4, [r5, #0xf]
-_080A0E02:
-	pop {r4, r5, r6, pc}
-	.align 2, 0
-_080A0E04: .4byte gUnk_08124B30
-
-	thumb_func_start sub_080A0E08
-sub_080A0E08: @ 0x080A0E08
-	push {lr}
-	adds r2, r0, #0
-	ldrb r0, [r2, #0xc]
-	cmp r0, #0
-	bne _080A0E26
-	movs r0, #1
-	strb r0, [r2, #0xc]
-	ldrb r1, [r2, #0x18]
-	subs r0, #5
-	ands r0, r1
-	movs r1, #2
-	orrs r0, r1
-	strb r0, [r2, #0x18]
-	movs r0, #0xf
-	strb r0, [r2, #0x1e]
-_080A0E26:
-	pop {pc}
diff --git a/assets/assets.json b/assets/assets.json
index d9233f31..d50b6ab8 100644
--- a/assets/assets.json
+++ b/assets/assets.json
@@ -45043,16 +45043,6 @@
     "size": 83,
     "type": "animation"
   },
-  {
-    "path": "objectB4/gUnk_08124B10.bin",
-    "start": 1198864,
-    "size": 16
-  },
-  {
-    "path": "objectB4/gUnk_08124B30.bin",
-    "start": 1198896,
-    "size": 8
-  },
   {
     "path": "objectB9/gUnk_08124C20.bin",
     "start": 1199136,
diff --git a/data/const/object/objectB4.s b/data/const/object/objectB4.s
deleted file mode 100644
index cc9159af..00000000
--- a/data/const/object/objectB4.s
+++ /dev/null
@@ -1,17 +0,0 @@
-	.include "asm/macros.inc"
-	.include "constants/constants.inc"
-
-	.section .rodata
-    .align 2
-
-gUnk_08124B10:: @ 08124B10
-	.incbin "objectB4/gUnk_08124B10.bin"
-
-gUnk_08124B20:: @ 08124B20
-	.4byte sub_080A0BA8
-	.4byte sub_080A0CE8
-	.4byte sub_080A0D70
-	.4byte sub_080A0E08
-
-gUnk_08124B30:: @ 08124B30
-	.incbin "objectB4/gUnk_08124B30.bin"
diff --git a/linker.ld b/linker.ld
index c087b85e..a05b5662 100644
--- a/linker.ld
+++ b/linker.ld
@@ -805,7 +805,7 @@ SECTIONS {
         src/object/jailBars.o(.text);
         src/object/objectB2.o(.text);
         src/object/objectB3.o(.text);
-        asm/object/objectB4.o(.text);
+        src/object/objectB4.o(.text);
         src/object/objectB5.o(.text);
         src/object/objectB6.o(.text);
         src/object/well.o(.text);
@@ -1561,7 +1561,7 @@ SECTIONS {
         data/animations/object/objectB2.o(.rodata);
         src/object/objectB3.o(.rodata);
         data/animations/object/objectB3.o(.rodata);
-        data/const/object/objectB4.o(.rodata);
+        src/object/objectB4.o(.rodata);
         data/animations/object/objectB4.o(.rodata);
         data/const/object/well.o(.rodata);
         src/object/windTribeTeleporter.o(.rodata);
diff --git a/src/object/objectB4.c b/src/object/objectB4.c
new file mode 100644
index 00000000..90c3b287
--- /dev/null
+++ b/src/object/objectB4.c
@@ -0,0 +1,135 @@
+#define NENT_DEPRECATED
+#include "entity.h"
+#include "menu.h"
+#include "coord.h"
+#include "object.h"
+
+extern void sub_0806FB00(Entity*, u32, u32, u32);
+extern bool32 sub_0806FB38(Entity*);
+
+void ObjectB4_Type0(Entity*);
+void ObjectB4_Type1(Entity*);
+void ObjectB4_Type2(Entity*);
+void ObjectB4_Type3(Entity*);
+
+const u16 gUnk_08124B10[] = { 0x40, 0x58, 0x68, 0x80, 0x94, 0xA8, 0xB0, 0x0 };
+
+void ObjectB4(Entity* this) {
+    static void (*const typeFuncs[])(Entity*) = {
+        ObjectB4_Type0,
+        ObjectB4_Type1,
+        ObjectB4_Type2,
+        ObjectB4_Type3,
+    };
+
+    typeFuncs[this->type]((Entity*)this);
+}
+
+void ObjectB4_Type0(Entity* this) {
+    Entity* pEVar3;
+
+    switch (this->action) {
+        case 0:
+            this->action = 1;
+            this->spriteSettings.draw = 2;
+            this->frameIndex = 9;
+            this->actionDelay = 8;
+            this->field_0xf = 0;
+            this->spriteRendering.b3 = 1;
+            this->spritePriority.b0 = 4;
+            this->spriteOrientation.flipY = 1;
+            sub_0806FB00(this, 0xbf, 0x48, 0x1e);
+            break;
+        case 1:
+            if ((this->field_0xf < 7) && (--this->actionDelay == 0)) {
+                this->actionDelay = 1;
+                pEVar3 = CreateObject(OBJECT_B4, 1, this->field_0xf);
+                if (pEVar3 != NULL) {
+                    CopyPosition(this, pEVar3);
+                    pEVar3->y.HALF.HI = 0x68;
+                    SortEntityBelow(this, pEVar3);
+                }
+                this->field_0xf++;
+            }
+
+            if (sub_0806FB38(this) || (1 < gMenu.menuType)) {
+                this->x.HALF.HI = 0xbf;
+                this->y.HALF.HI = 0x48;
+                this->frameIndex = 10;
+                this->action = 2;
+                while (this->field_0xf < 7) {
+                    pEVar3 = CreateObject(OBJECT_B4, 1, this->field_0xf);
+                    if (pEVar3 != NULL) {
+                        CopyPosition(this, pEVar3);
+                        pEVar3->y.HALF.HI = 0x68;
+                        SortEntityBelow(this, pEVar3);
+                    }
+                    this->field_0xf++;
+                }
+
+                pEVar3 = CreateObject(OBJECT_B4, 2, 0);
+                if (pEVar3 != NULL) {
+                    pEVar3->x.HALF.HI = 0xc4;
+                    pEVar3->y.HALF.HI = 0x2c;
+                    SortEntityAbove(this, pEVar3);
+                }
+
+                pEVar3 = CreateObject(OBJECT_B4, 3, 0);
+                if (pEVar3 != NULL) {
+                    pEVar3->x.HALF.HI = 0xb4;
+                    pEVar3->y.HALF.HI = 0x19;
+                    SortEntityAbove(this, pEVar3);
+                }
+            }
+    }
+}
+
+void ObjectB4_Type1(Entity* this) {
+    switch (this->action) {
+        case 0:
+            this->action = 1;
+            this->spriteSettings.draw = 2;
+            this->frameIndex = this->type2 + 2;
+            sub_0806FB00(this, gUnk_08124B10[this->type2], 0x68, 0x14);
+            break;
+        case 1:
+            if (sub_0806FB38(this) || 1 < gMenu.menuType) {
+                this->x.HALF.HI = gUnk_08124B10[this->type2];
+                this->y.HALF.HI = 0x68;
+                this->spritePriority.b0 = 7 - this->type2;
+                this->action = 2;
+            }
+            break;
+    }
+}
+
+void ObjectB4_Type2(Entity* this) {
+    static const u8 gUnk_08124B30[] = { 9, 10, 11, 12, 11, 10, 9, -1 };
+    if (this->action == 0) {
+        this->action = 1;
+        this->spriteSettings.draw = 2;
+        this->spriteRendering.b3 = 1;
+        this->spritePriority.b0 = 0;
+        this->spriteOrientation.flipY = 1;
+        this->frameIndex = 11;
+        this->actionDelay = (Random() & 0x3f) + 0x40;
+        this->field_0xf = 0;
+    }
+
+    if (--this->actionDelay == 0) {
+        this->actionDelay = 4;
+        this->frameIndex = gUnk_08124B30[this->field_0xf++] + 2;
+        if (gUnk_08124B30[this->field_0xf] == 0xff) {
+            this->actionDelay = (Random() & 0x3f) + 0x40;
+            this->field_0xf = 0;
+        }
+    }
+}
+
+void ObjectB4_Type3(Entity* this) {
+    if (this->action == 0) {
+        this->action = 1;
+        this->spriteSettings.draw = 2;
+        this->frameIndex = 15;
+    }
+}