diff --git a/src/800.c b/src/800.c
index 1e73d1a50..8477d9092 100644
--- a/src/800.c
+++ b/src/800.c
@@ -20710,7 +20710,55 @@ s32 func_800348A8(u32 arg0) {
     return 0;
 }
 
-INCLUDE_ASM("asm/nonmatchings/800", func_8003491C);
+extern u8 D_8006451C[];
+extern s8 D_800A4F17;
+
+extern s32 func_8002F4E4(u8 *);
+
+void func_8003491C(s32 arg0)
+{
+    register s32 zr __asm__("$0");
+    s32 id;
+    s32 raw;
+    s32 t;
+    s16 lo;
+    s16 hi;
+    u8 *p;
+    u8 old;
+    u8 *e;
+    s32 i;
+
+    id = arg0 + zr;
+    lo = (s16)arg0;
+    p = &D_8006451C[lo * 4];
+    hi = (s16)((u32)arg0 >> 16);
+    if ((*p & 0x7F) == 6) {
+        raw = func_8002F4E4(p);
+        t = (s16)raw;
+        id = raw + zr;
+        if (t == 0) {
+            return;
+        }
+        p = &D_8006451C[t * 4];
+    }
+    if ((s16)id < 0x100) {
+        return;
+    }
+    old = *(u8 *)&D_800A4F17;
+    *(u8 *)&D_800A4F17 = 1;
+    if ((*p & 0x7F) != 1 && (*p & 0x7F) == 5) {
+        e = (u8 *)&D_800A4F17 - 0x82F;
+        for (i = 0; i < 8; i++, e += 0x54) {
+            if (*(u16 *)e == 5 && *(u16 *)(e + 4) == lo) {
+                if (hi == 0 || hi == *(u16 *)(e + 6)) {
+                    e[0x16] = 1;
+                }
+            }
+        }
+    }
+    *(u8 *)&D_800A4F17 = old;
+}
+
 
 
 extern s8 D_800A4F17;