diff --git a/config/dedup.us.yaml b/config/dedup.us.yaml
index bb567fc2f7..0ec98d1898 100644
--- a/config/dedup.us.yaml
+++ b/config/dedup.us.yaml
@@ -14817,3 +14817,10 @@ groups:
     func: DEFINE_func_8018B614
     vram: 0x8018B614
     binaries: [ov_SC04_018, ov_SC04_019]
+  - id: E_func_8018C1E0
+    tier: h_exact
+    hash: 5fb4815cc3aa53413cfb656da14781076dd0fb9c
+    source: src/shared/engine_core.h
+    func: DEFINE_func_8018C1E0
+    vram: 0x8018C1E0
+    binaries: [ov_SC04_018, ov_SC04_019]
diff --git a/src/ov_SC04_018/ov_SC04_018_jr_80188E1C.c b/src/ov_SC04_018/ov_SC04_018_jr_80188E1C.c
index 55e2b7696e..40f94ea22c 100644
--- a/src/ov_SC04_018/ov_SC04_018_jr_80188E1C.c
+++ b/src/ov_SC04_018/ov_SC04_018_jr_80188E1C.c
@@ -4752,21 +4752,7 @@ INCLUDE_ASM("asm/ov_SC04_018/nonmatchings/ov_SC04_018_jr_80188E1C", func_8018C11
 
 #include "common.h"
 
-extern s32 aF801848DC(void *) __asm__("func_801848DC");
-extern s32 func_80178BF8();      /* TU-canonical (ov_SC04_018_jr_8017AE2C.c L2539) */
-extern void func_80172710(void); /* TU-canonical (ov_SC04_018_jr_8017AE2C.c L2231) */
-
-s32 func_8018C1E0(void *a0) {
-    if (*(u16 *)(*(s32 *)((s32)a0 + 0x64) + 0x2) != 3) {
-        return 0;
-    }
-    if (aF801848DC(a0) == 0) {
-        return 0;
-    }
-    *(s16 *)(*(s32 *)((s32)a0 + 0x64) + 0x2) = 4;
-    func_80178BF8();
-    return (s32)func_80172710;
-}
+DEFINE_func_8018C1E0()  /* dedup: shared engine-core @0x8018C1E0 (src/shared) */
 
 
 
diff --git a/src/ov_SC04_019/ov_SC04_019_jr_80188E1C.c b/src/ov_SC04_019/ov_SC04_019_jr_80188E1C.c
index 8120934e86..7c7330e639 100644
--- a/src/ov_SC04_019/ov_SC04_019_jr_80188E1C.c
+++ b/src/ov_SC04_019/ov_SC04_019_jr_80188E1C.c
@@ -4159,7 +4159,7 @@ INCLUDE_ASM("asm/ov_SC04_019/nonmatchings/ov_SC04_019_jr_80188E1C", func_8018C0B
 
 INCLUDE_ASM("asm/ov_SC04_019/nonmatchings/ov_SC04_019_jr_80188E1C", func_8018C114);
 
-INCLUDE_ASM("asm/ov_SC04_019/nonmatchings/ov_SC04_019_jr_80188E1C", func_8018C1E0);
+DEFINE_func_8018C1E0()  /* dedup: shared engine-core @0x8018C1E0 (src/shared) */
 
 
 extern void func_80184CB8(s32*, s32);
diff --git a/src/shared/engine_core.h b/src/shared/engine_core.h
index 8551189ae6..fa1768d09d 100644
--- a/src/shared/engine_core.h
+++ b/src/shared/engine_core.h
@@ -61008,6 +61008,22 @@
         func_8018B564(a0); \
     }
 
+#define DEFINE_func_8018C1E0() \
+    extern s32 aF801848DC(void *) __asm__("func_801848DC"); \
+    extern s32 func_80178BF8();      /* TU-canonical (ov_SC04_018_jr_8017AE2C.c L2539) */ \
+    extern void func_80172710(void); /* TU-canonical (ov_SC04_018_jr_8017AE2C.c L2231) */ \
+    s32 func_8018C1E0(void *a0) { \
+        if (*(u16 *)(*(s32 *)((s32)a0 + 0x64) + 0x2) != 3) { \
+            return 0; \
+        } \
+        if (aF801848DC(a0) == 0) { \
+            return 0; \
+        } \
+        *(s16 *)(*(s32 *)((s32)a0 + 0x64) + 0x2) = 4; \
+        func_80178BF8(); \
+        return (s32)func_80172710; \
+    }
+
 #endif
 
 #define DEFINE_func_80128EA8() \
@@ -151421,4 +151437,20 @@
         func_8018B564(a0); \
     }
 
+#define DEFINE_func_8018C1E0() \
+    extern s32 aF801848DC(void *) __asm__("func_801848DC"); \
+    extern s32 func_80178BF8();      /* TU-canonical (ov_SC04_018_jr_8017AE2C.c L2539) */ \
+    extern void func_80172710(void); /* TU-canonical (ov_SC04_018_jr_8017AE2C.c L2231) */ \
+    s32 func_8018C1E0(void *a0) { \
+        if (*(u16 *)(*(s32 *)((s32)a0 + 0x64) + 0x2) != 3) { \
+            return 0; \
+        } \
+        if (aF801848DC(a0) == 0) { \
+            return 0; \
+        } \
+        *(s16 *)(*(s32 *)((s32)a0 + 0x64) + 0x2) = 4; \
+        func_80178BF8(); \
+        return (s32)func_80172710; \
+    }
+
 #endif