diff --git a/asm/secret_base.s b/asm/secret_base.s
index 2bb2003b1..211405ac7 100644
--- a/asm/secret_base.s
+++ b/asm/secret_base.s
@@ -5,256 +5,6 @@
 
 	.text
 
-	thumb_func_start sub_80EBB28
-sub_80EBB28: @ 80EBB28
-	push {r4,lr}
-	sub sp, 0x4
-	mov r4, sp
-	adds r4, 0x2
-	mov r0, sp
-	adds r1, r4, 0
-	bl GetXYCoordsOneStepInFrontOfPlayer
-	mov r0, sp
-	movs r1, 0
-	ldrsh r0, [r0, r1]
-	movs r2, 0
-	ldrsh r1, [r4, r2]
-	bl MapGridGetMetatileIdAt
-	ldr r1, =0xfffffddb
-	adds r0, r1
-	cmp r0, 0xA2
-	bls _080EBB50
-	b _080EBE6C
-_080EBB50:
-	lsls r0, 2
-	ldr r1, =_080EBB64
-	adds r0, r1
-	ldr r0, [r0]
-	mov pc, r0
-	.pool
-	.align 2, 0
-_080EBB64:
-	.4byte _080EBE48
-	.4byte _080EBE48
-	.4byte _080EBE48
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE14
-	.4byte _080EBE14
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBDF0
-	.4byte _080EBE6C
-	.4byte _080EBDF0
-	.4byte _080EBDF0
-	.4byte _080EBE6C
-	.4byte _080EBDF0
-	.4byte _080EBDF0
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBDF0
-	.4byte _080EBE6C
-	.4byte _080EBDF0
-	.4byte _080EBDF0
-	.4byte _080EBDF0
-	.4byte _080EBE6C
-	.4byte _080EBDF0
-	.4byte _080EBDF0
-	.4byte _080EBDF0
-	.4byte _080EBE6C
-	.4byte _080EBDF0
-	.4byte _080EBE6C
-	.4byte _080EBDF0
-	.4byte _080EBE6C
-	.4byte _080EBDF0
-	.4byte _080EBDF0
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBDF0
-	.4byte _080EBDF0
-	.4byte _080EBE6C
-	.4byte _080EBDF0
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBE6C
-	.4byte _080EBDF0
-	.4byte _080EBDF0
-	.4byte _080EBE6C
-	.4byte _080EBDF0
-_080EBDF0:
-	ldr r0, =0x00004054
-	bl VarGet
-	lsls r0, 16
-	cmp r0, 0
-	beq _080EBE6C
-	ldr r4, =0x000040ef
-	adds r0, r4, 0
-	bl VarGet
-	adds r1, r0, 0
-	movs r0, 0x8
-	b _080EBE30
-	.pool
-_080EBE14:
-	ldr r0, =0x00004054
-	bl VarGet
-	lsls r0, 16
-	cmp r0, 0
-	beq _080EBE6C
-	ldr r4, =0x000040ef
-	adds r0, r4, 0
-	bl VarGet
-	adds r1, r0, 0
-	movs r2, 0x80
-	lsls r2, 1
-	adds r0, r2, 0
-_080EBE30:
-	orrs r1, r0
-	lsls r1, 16
-	lsrs r1, 16
-	adds r0, r4, 0
-	bl VarSet
-	b _080EBE6C
-	.pool
-_080EBE48:
-	ldr r0, =0x00004054
-	bl VarGet
-	lsls r0, 16
-	cmp r0, 0
-	beq _080EBE6C
-	ldr r4, =0x000040ef
-	adds r0, r4, 0
-	bl VarGet
-	adds r1, r0, 0
-	movs r0, 0x10
-	orrs r1, r0
-	lsls r1, 16
-	lsrs r1, 16
-	adds r0, r4, 0
-	bl VarSet
-_080EBE6C:
-	add sp, 0x4
-	pop {r4}
-	pop {r0}
-	bx r0
-	.pool
-	thumb_func_end sub_80EBB28
-
 	thumb_func_start sub_80EBE7C
 sub_80EBE7C: @ 80EBE7C
 	push {r4,lr}
diff --git a/src/secret_base.c b/src/secret_base.c
index b17575a9b..4cdaf02a8 100644
--- a/src/secret_base.c
+++ b/src/secret_base.c
@@ -2141,3 +2141,56 @@ void sub_80EB9E0(void)
             break;
     }
 }
+
+void sub_80EBB28(void)
+{
+    s16 x;
+    s16 y;
+
+    GetXYCoordsOneStepInFrontOfPlayer(&x, &y);
+    switch (MapGridGetMetatileIdAt(x, y))
+    {
+        case 0x290:
+        case 0x292:
+        case 0x293:
+        case 0x295:
+        case 0x296:
+        case 0x2a0:
+        case 0x2a2:
+        case 0x2a3:
+        case 0x2a4:
+        case 0x2a6:
+        case 0x2a7:
+        case 0x2a8:
+        case 0x2aa:
+        case 0x2ac:
+        case 0x2ae:
+        case 0x2af:
+        case 0x2bc:
+        case 0x2bd:
+        case 0x2bf:
+        case 0x2c4:
+        case 0x2c5:
+        case 0x2c7:
+            if (VarGet(VAR_0x4054) != 0)
+            {
+                VarSet(VAR_0x40EF, VarGet(VAR_0x40EF) | 0x8);
+            }
+            break;
+        case 0x280:
+        case 0x281:
+            if (VarGet(VAR_0x4054) != 0)
+            {
+                VarSet(VAR_0x40EF, VarGet(VAR_0x40EF) | 0x100);
+            }
+            break;
+        case 0x225:
+        case 0x226:
+        case 0x227:
+            if (VarGet(VAR_0x4054) != 0)
+            {
+                VarSet(VAR_0x40EF, VarGet(VAR_0x40EF) | 0x10);
+            }
+            break;
+    }
+}