diff --git a/asm/minishSizedEntrance.s b/asm/minishSizedEntrance.s
deleted file mode 100644
index aa4edc0d..00000000
--- a/asm/minishSizedEntrance.s
+++ /dev/null
@@ -1,62 +0,0 @@
-	.include "asm/macros.inc"
-
-	.include "constants/constants.inc"
-
-	.syntax unified
-
-	.text
-
-	thumb_func_start sub_08090F00
-sub_08090F00: @ 0x08090F00
-	push {r4, r5, r6, lr}
-	adds r4, r0, #0
-	ldrb r1, [r4, #0xa]
-	cmp r1, #1
-	bne _08090F1C
-	ldr r0, [r4, #0x50]
-	ldrb r2, [r4, #0xf]
-	lsls r1, r2
-	ldr r0, [r0, #0x20]
-	ands r0, r1
-	cmp r0, #0
-	bne _08090F1C
-	bl DeleteThisEntity
-_08090F1C:
-	ldr r6, _08090F64 @ =gPlayerState
-	ldr r0, [r6, #0x30]
-	movs r1, #0x80
-	ands r0, r1
-	cmp r0, #0
-	beq _08090F62
-	ldr r5, _08090F68 @ =gPlayerEntity
-	adds r0, r4, #0
-	adds r1, r5, #0
-	movs r2, #4
-	movs r3, #4
-	bl sub_080041A0
-	cmp r0, #0
-	beq _08090F62
-	movs r1, #0x36
-	ldrsh r0, [r5, r1]
-	cmp r0, #0
-	bne _08090F62
-	adds r2, r6, #0
-	adds r2, #0x90
-	ldr r1, _08090F6C @ =gUnk_0812225C
-	ldrb r0, [r4, #0xb]
-	lsls r0, r0, #1
-	adds r0, r0, r1
-	ldrh r1, [r2]
-	ldrh r0, [r0]
-	ands r0, r1
-	cmp r0, #0
-	beq _08090F62
-	ldrb r0, [r4, #0xe]
-	bl GetCurrentRoomProperty
-	bl DoExitTransition
-_08090F62:
-	pop {r4, r5, r6, pc}
-	.align 2, 0
-_08090F64: .4byte gPlayerState
-_08090F68: .4byte gPlayerEntity
-_08090F6C: .4byte gUnk_0812225C
diff --git a/linker.ld b/linker.ld
index ba362d8e..44ee3fdf 100644
--- a/linker.ld
+++ b/linker.ld
@@ -755,7 +755,6 @@ SECTIONS {
         asm/pushableFurniture.o(.text);
         asm/furniture.o(.text);
         src/object/minishSizedEntrance.o(.text);
-        asm/minishSizedEntrance.o(.text);
         src/object/archway.o(.text);
         asm/giantRock.o(.text);
         asm/object51.o(.text);
diff --git a/src/object/minishSizedEntrance.c b/src/object/minishSizedEntrance.c
index 2f08f996..03467f41 100644
--- a/src/object/minishSizedEntrance.c
+++ b/src/object/minishSizedEntrance.c
@@ -1,9 +1,13 @@
 #include "global.h"
 #include "entity.h"
 #include "game.h"
+#include "player.h"
 #include "functions.h"
 
+extern void DoExitTransition(void*);
+
 extern void (*const gUnk_08122254[])(Entity*);
+extern u16 gUnk_0812225C[];
 
 void MinishSizedEntrance(Entity* this) {
     gUnk_08122254[this->action](this);
@@ -20,3 +24,17 @@ void sub_08090EC0(Entity* this) {
         LoadFixedGFX(this, 0x184);
     }
 }
+
+void sub_08090F00(Entity* this) {
+    if (this->type == 1) {
+        Entity* parent = this->parent;
+        u32 mask = 1 << this->field_0xf;
+        if (!(parent->field_0x20 & mask)) {
+            DeleteThisEntity();
+        }
+    }
+    if ((gPlayerState.flags.all & 0x80) && sub_080041A0(this, &gPlayerEntity, 4, 4) &&
+        (gPlayerEntity.height.HALF.HI == 0) && (((u16)gPlayerState.field_0x90.HALF.LO) & gUnk_0812225C[this->type2])) {
+        DoExitTransition((Entity*)GetCurrentRoomProperty(this->actionDelay));
+    }
+}