diff --git a/asm/secret_base.s b/asm/secret_base.s
index b3c5eaf71..9eeb217b9 100644
--- a/asm/secret_base.s
+++ b/asm/secret_base.s
@@ -5,192 +5,6 @@
 
 	.text
 
-	thumb_func_start sub_80E8C98
-sub_80E8C98: @ 80E8C98
-	push {r4,lr}
-	ldr r4, =gSpecialVar_0x8007
-	bl sub_80E8BF8
-	lsls r0, 24
-	lsrs r0, 24
-	strh r0, [r4]
-	pop {r4}
-	pop {r0}
-	bx r0
-	.pool
-	thumb_func_end sub_80E8C98
-
-	thumb_func_start sub_80E8CB0
-sub_80E8CB0: @ 80E8CB0
-	push {r4-r7,lr}
-	mov r7, r10
-	mov r6, r9
-	mov r5, r8
-	push {r5-r7}
-	sub sp, 0x8
-	str r0, [sp]
-	str r1, [sp, 0x4]
-	lsls r2, 16
-	lsrs r2, 16
-	mov r10, r2
-	ldr r0, =gMapHeader
-	ldr r0, [r0]
-	mov r8, r0
-	movs r0, 0
-	mov r12, r0
-	mov r1, r8
-	ldr r0, [r1, 0x4]
-	cmp r12, r0
-	bge _080E8D3C
-	ldr r4, [r1]
-_080E8CDA:
-	movs r2, 0
-	mov r0, r12
-	lsls r7, r0, 16
-	cmp r2, r4
-	bge _080E8D28
-	asrs r0, r7, 16
-	adds r6, r0, 0
-	muls r6, r4
-	mov r1, r8
-	ldr r5, [r1, 0xC]
-	ldr r0, =0x000003ff
-	mov r9, r0
-_080E8CF2:
-	lsls r0, r2, 16
-	asrs r3, r0, 16
-	adds r0, r6, r3
-	lsls r0, 1
-	adds r0, r5
-	ldrh r1, [r0]
-	mov r0, r9
-	ands r0, r1
-	cmp r0, r10
-	bne _080E8D1C
-	ldr r1, [sp]
-	strh r2, [r1]
-	mov r0, r12
-	ldr r2, [sp, 0x4]
-	strh r0, [r2]
-	b _080E8D3C
-	.pool
-_080E8D1C:
-	adds r0, r3, 0x1
-	lsls r0, 16
-	lsrs r2, r0, 16
-	asrs r0, 16
-	cmp r0, r4
-	blt _080E8CF2
-_080E8D28:
-	movs r2, 0x80
-	lsls r2, 9
-	adds r1, r7, r2
-	lsrs r0, r1, 16
-	mov r12, r0
-	asrs r1, 16
-	mov r2, r8
-	ldr r0, [r2, 0x4]
-	cmp r1, r0
-	blt _080E8CDA
-_080E8D3C:
-	add sp, 0x8
-	pop {r3-r5}
-	mov r8, r3
-	mov r9, r4
-	mov r10, r5
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	thumb_func_end sub_80E8CB0
-
-	thumb_func_start sub_80E8D4C
-sub_80E8D4C: @ 80E8D4C
-	push {r4-r7,lr}
-	mov r7, r8
-	push {r7}
-	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
-	movs r5, 0
-	mov r12, r4
-	lsls r0, 16
-	asrs r3, r0, 16
-	ldr r1, =gUnknown_0858CFCC
-	mov r8, r1
-	adds r7, r0, 0
-	mov r4, sp
-	mov r6, r12
-_080E8D80:
-	ldr r0, =gUnknown_0858CFCC
-	lsls r1, r5, 2
-	adds r2, r1, r0
-	ldrh r0, [r2]
-	cmp r0, r3
-	bne _080E8D9C
-	movs r3, 0
-	ldrsh r0, [r4, r3]
-	movs r5, 0
-	ldrsh r1, [r6, r5]
-	ldrh r3, [r2, 0x2]
-	b _080E8DC4
-	.pool
-_080E8D9C:
-	adds r0, r5, 0x1
-	lsls r0, 16
-	lsrs r5, r0, 16
-	cmp r5, 0x6
-	bls _080E8D80
-	movs r5, 0
-	mov r4, sp
-	mov r6, r12
-_080E8DAC:
-	lsls r0, r5, 2
-	mov r1, r8
-	adds r3, r0, r1
-	ldrh r1, [r3, 0x2]
-	asrs r0, r7, 16
-	cmp r1, r0
-	bne _080E8DDE
-	movs r2, 0
-	ldrsh r0, [r4, r2]
-	movs r5, 0
-	ldrsh r1, [r6, r5]
-	ldrh r3, [r3]
-_080E8DC4:
-	movs r5, 0xC0
-	lsls r5, 4
-	adds r2, r5, 0
-	orrs r2, r3
-	bl MapGridSetMetatileIdAt
-	movs r1, 0
-	ldrsh r0, [r4, r1]
-	movs r2, 0
-	ldrsh r1, [r6, r2]
-	bl CurrentMapDrawMetatileAt
-	b _080E8DE8
-_080E8DDE:
-	adds r0, r5, 0x1
-	lsls r0, 16
-	lsrs r5, r0, 16
-	cmp r5, 0x6
-	bls _080E8DAC
-_080E8DE8:
-	add sp, 0x4
-	pop {r3}
-	mov r8, r3
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	thumb_func_end sub_80E8D4C
-
 	thumb_func_start sub_80E8DF4
 sub_80E8DF4: @ 80E8DF4
 	push {lr}
diff --git a/include/field_camera.h b/include/field_camera.h
index f74fadd86..a8559e1c2 100644
--- a/include/field_camera.h
+++ b/include/field_camera.h
@@ -23,5 +23,6 @@ extern u16 gUnknown_03005DE8;
 // Exported ROM declarations
 
 void DrawWholeMapView(void);
+void CurrentMapDrawMetatileAt(int x, int y);
 
 #endif //GUARD_FIELD_CAMERA_H
diff --git a/src/secret_base.c b/src/secret_base.c
index d92a035be..5f6ee5ea6 100644
--- a/src/secret_base.c
+++ b/src/secret_base.c
@@ -5,6 +5,7 @@
 #include "decoration.h"
 #include "decoration_inventory.h"
 #include "fieldmap.h"
+#include "field_camera.h"
 #include "field_player_avatar.h"
 #include "text.h"
 #include "event_data.h"
@@ -26,6 +27,11 @@ EWRAM_DATA struct SecretBaseListMenuBuffer *gUnknown_0203A020 = NULL;
 
 // .rodata
 
+extern const struct {
+    u16 tile1;
+    u16 tile2;
+} gUnknown_0858CFCC[7];
+
 // .text
 
 void sub_80E8AF0(struct SecretBaseRecord *sbr)
@@ -117,3 +123,144 @@ u8 sub_80E8BF8(void)
     }
     return 0;
 }
+
+void sub_80E8C98(void)
+{
+    gSpecialVar_0x8007 = sub_80E8BF8();
+}
+
+#ifdef NONMATCHING
+// This function was refactored in some mysterious way
+void sub_80E8CB0(s16 *xPtr, s16 *yPtr, u16 tile)
+{
+    struct MapData *mapData;
+    s16 x;
+    s16 y;
+
+    mapData = gMapHeader.mapData;
+    for (y = 0; y < mapData->height; y ++)
+    {
+        for (x = 0; x < mapData->width; x ++)
+        {
+            if ((mapData->map[y * mapData->width + x] % 0x400) == tile)
+            {
+                *xPtr = x;
+                *yPtr = y;
+                return;
+            }
+        }
+    }
+}
+#else
+__attribute__((naked)) void sub_80E8CB0(s16 *xPtr, s16 *yPtr, u16 tile)
+{
+    asm_unified("\tpush {r4-r7,lr}\n"
+                    "\tmov r7, r10\n"
+                    "\tmov r6, r9\n"
+                    "\tmov r5, r8\n"
+                    "\tpush {r5-r7}\n"
+                    "\tsub sp, 0x8\n"
+                    "\tstr r0, [sp]\n"
+                    "\tstr r1, [sp, 0x4]\n"
+                    "\tlsls r2, 16\n"
+                    "\tlsrs r2, 16\n"
+                    "\tmov r10, r2\n"
+                    "\tldr r0, =gMapHeader\n"
+                    "\tldr r0, [r0]\n"
+                    "\tmov r8, r0\n"
+                    "\tmovs r0, 0\n"
+                    "\tmov r12, r0\n"
+                    "\tmov r1, r8\n"
+                    "\tldr r0, [r1, 0x4]\n"
+                    "\tcmp r12, r0\n"
+                    "\tbge _080E8D3C\n"
+                    "\tldr r4, [r1]\n"
+                    "_080E8CDA:\n"
+                    "\tmovs r2, 0\n"
+                    "\tmov r0, r12\n"
+                    "\tlsls r7, r0, 16\n"
+                    "\tcmp r2, r4\n"
+                    "\tbge _080E8D28\n"
+                    "\tasrs r0, r7, 16\n"
+                    "\tadds r6, r0, 0\n"
+                    "\tmuls r6, r4\n"
+                    "\tmov r1, r8\n"
+                    "\tldr r5, [r1, 0xC]\n"
+                    "\tldr r0, =0x000003ff\n"
+                    "\tmov r9, r0\n"
+                    "_080E8CF2:\n"
+                    "\tlsls r0, r2, 16\n"
+                    "\tasrs r3, r0, 16\n"
+                    "\tadds r0, r6, r3\n"
+                    "\tlsls r0, 1\n"
+                    "\tadds r0, r5\n"
+                    "\tldrh r1, [r0]\n"
+                    "\tmov r0, r9\n"
+                    "\tands r0, r1\n"
+                    "\tcmp r0, r10\n"
+                    "\tbne _080E8D1C\n"
+                    "\tldr r1, [sp]\n"
+                    "\tstrh r2, [r1]\n"
+                    "\tmov r0, r12\n"
+                    "\tldr r2, [sp, 0x4]\n"
+                    "\tstrh r0, [r2]\n"
+                    "\tb _080E8D3C\n"
+                    "\t.pool\n"
+                    "_080E8D1C:\n"
+                    "\tadds r0, r3, 0x1\n"
+                    "\tlsls r0, 16\n"
+                    "\tlsrs r2, r0, 16\n"
+                    "\tasrs r0, 16\n"
+                    "\tcmp r0, r4\n"
+                    "\tblt _080E8CF2\n"
+                    "_080E8D28:\n"
+                    "\tmovs r2, 0x80\n"
+                    "\tlsls r2, 9\n"
+                    "\tadds r1, r7, r2\n"
+                    "\tlsrs r0, r1, 16\n"
+                    "\tmov r12, r0\n"
+                    "\tasrs r1, 16\n"
+                    "\tmov r2, r8\n"
+                    "\tldr r0, [r2, 0x4]\n"
+                    "\tcmp r1, r0\n"
+                    "\tblt _080E8CDA\n"
+                    "_080E8D3C:\n"
+                    "\tadd sp, 0x8\n"
+                    "\tpop {r3-r5}\n"
+                    "\tmov r8, r3\n"
+                    "\tmov r9, r4\n"
+                    "\tmov r10, r5\n"
+                    "\tpop {r4-r7}\n"
+                    "\tpop {r0}\n"
+                    "\tbx r0");
+}
+#endif
+
+void sub_80E8D4C(void)
+{
+    s16 x;
+    s16 y;
+    s16 tile;
+    u16 i;
+
+    GetXYCoordsOneStepInFrontOfPlayer(&x, &y);
+    tile = MapGridGetMetatileIdAt(x, y);
+    for (i = 0; i < 7; i ++)
+    {
+        if (gUnknown_0858CFCC[i].tile1 == tile)
+        {
+            MapGridSetMetatileIdAt(x, y, gUnknown_0858CFCC[i].tile2 | 0xC00);
+            CurrentMapDrawMetatileAt(x, y);
+            return;
+        }
+    }
+    for (i = 0; i < 7; i ++)
+    {
+        if (gUnknown_0858CFCC[i].tile2 == tile)
+        {
+            MapGridSetMetatileIdAt(x, y, gUnknown_0858CFCC[i].tile1 | 0xC00);
+            CurrentMapDrawMetatileAt(x, y);
+            return;
+        }
+    }
+}