diff --git a/config/dedup.us.yaml b/config/dedup.us.yaml
index 61bc91ac7..350f7c0c2 100644
--- a/config/dedup.us.yaml
+++ b/config/dedup.us.yaml
@@ -14999,3 +14999,10 @@ groups:
     func: DEFINE_func_80188790
     vram: 0x80188790
     binaries: [ov_SC02_000, ov_SC02_003]
+  - id: E_func_80181820
+    tier: h_exact
+    hash: 07c2791e5f29cd5836f8c46dacea4e3819c18737
+    source: src/shared/engine_core.h
+    func: DEFINE_func_80181820
+    vram: 0x80181820
+    binaries: [ov_SC02_000, ov_SC02_003]
diff --git a/src/ov_SC02_000/ov_SC02_000_jr_8018173C.c b/src/ov_SC02_000/ov_SC02_000_jr_8018173C.c
index 793c1bde7..fa077ab9a 100644
--- a/src/ov_SC02_000/ov_SC02_000_jr_8018173C.c
+++ b/src/ov_SC02_000/ov_SC02_000_jr_8018173C.c
@@ -2782,36 +2782,7 @@ void func_8018173C(int param_1) {
 
 #include "common.h"
 
-extern s32 D_80126954;
-extern s32 D_8012695C;
-extern s16 D_80126968;
-extern s16 D_8012696A;
-extern s16 D_80126976;
-extern s16 D_8012696C;
-extern s16 D_80126978;
-extern s16 D_8012697A;
-extern u8 D_80126948[];
-extern void func_8012A018(s32 a, s32 b);
-extern void func_80181D2C(u8*);
-extern void func_8012A094(s32 a0);
-
-void func_80181820(void) {
-    u8 *ptr;
-
-    D_80126954 = 0x12C;
-    D_8012695C = 0x3E8;
-    D_80126968 = 0x80;
-    D_8012696A = 0x200;
-    D_80126976 = 0x50;
-    D_8012696C = 0;
-    D_80126978 = -0xC8;
-    D_8012697A = 0;
-
-    func_8012A018((s32)func_80181D2C, 0);
-    ptr = D_80126948;
-    ((void (*)(void *))func_80181D2C)(ptr);
-    func_8012A094((s32)ptr);
-}
+DEFINE_func_80181820()  /* dedup: shared engine-core @0x80181820 (src/shared) */
 
 
 INCLUDE_ASM("asm/ov_SC02_000/nonmatchings/ov_SC02_000_jr_8018173C", func_801818C0);
diff --git a/src/ov_SC02_003/ov_SC02_003_jr_8018173C.c b/src/ov_SC02_003/ov_SC02_003_jr_8018173C.c
index 28a46b220..dc09145ba 100644
--- a/src/ov_SC02_003/ov_SC02_003_jr_8018173C.c
+++ b/src/ov_SC02_003/ov_SC02_003_jr_8018173C.c
@@ -2777,7 +2777,7 @@ void func_8018173C(int param_1) {
     return;
 }
 
-INCLUDE_ASM("asm/ov_SC02_003/nonmatchings/ov_SC02_003_jr_8018173C", func_80181820);
+DEFINE_func_80181820()  /* dedup: shared engine-core @0x80181820 (src/shared) */
 
 INCLUDE_ASM("asm/ov_SC02_003/nonmatchings/ov_SC02_003_jr_8018173C", func_801818C0);
 
diff --git a/src/shared/engine_core.h b/src/shared/engine_core.h
index 93a307542..15d3c6af8 100644
--- a/src/shared/engine_core.h
+++ b/src/shared/engine_core.h
@@ -61904,6 +61904,35 @@
         } \
     }
 
+#define DEFINE_func_80181820() \
+    extern s32 D_80126954; \
+    extern s32 D_8012695C; \
+    extern s16 D_80126968; \
+    extern s16 D_8012696A; \
+    extern s16 D_80126976; \
+    extern s16 D_8012696C; \
+    extern s16 D_80126978; \
+    extern s16 D_8012697A; \
+    extern u8 D_80126948[]; \
+    extern void func_8012A018(s32 a, s32 b); \
+    extern void func_80181D2C(u8*); \
+    extern void func_8012A094(s32 a0); \
+    void func_80181820(void) { \
+        u8 *ptr; \
+        D_80126954 = 0x12C; \
+        D_8012695C = 0x3E8; \
+        D_80126968 = 0x80; \
+        D_8012696A = 0x200; \
+        D_80126976 = 0x50; \
+        D_8012696C = 0; \
+        D_80126978 = -0xC8; \
+        D_8012697A = 0; \
+        func_8012A018((s32)func_80181D2C, 0); \
+        ptr = D_80126948; \
+        ((void (*)(void *))func_80181D2C)(ptr); \
+        func_8012A094((s32)ptr); \
+    }
+
 #endif
 
 #define DEFINE_func_80128EA8() \
@@ -153213,4 +153242,33 @@
         } \
     }
 
+#define DEFINE_func_80181820() \
+    extern s32 D_80126954; \
+    extern s32 D_8012695C; \
+    extern s16 D_80126968; \
+    extern s16 D_8012696A; \
+    extern s16 D_80126976; \
+    extern s16 D_8012696C; \
+    extern s16 D_80126978; \
+    extern s16 D_8012697A; \
+    extern u8 D_80126948[]; \
+    extern void func_8012A018(s32 a, s32 b); \
+    extern void func_80181D2C(u8*); \
+    extern void func_8012A094(s32 a0); \
+    void func_80181820(void) { \
+        u8 *ptr; \
+        D_80126954 = 0x12C; \
+        D_8012695C = 0x3E8; \
+        D_80126968 = 0x80; \
+        D_8012696A = 0x200; \
+        D_80126976 = 0x50; \
+        D_8012696C = 0; \
+        D_80126978 = -0xC8; \
+        D_8012697A = 0; \
+        func_8012A018((s32)func_80181D2C, 0); \
+        ptr = D_80126948; \
+        ((void (*)(void *))func_80181D2C)(ptr); \
+        func_8012A094((s32)ptr); \
+    }
+
 #endif