diff --git a/config/dedup.us.yaml b/config/dedup.us.yaml
index f9d9e5e252..24e35a1dfc 100644
--- a/config/dedup.us.yaml
+++ b/config/dedup.us.yaml
@@ -15048,3 +15048,10 @@ groups:
     func: DEFINE_func_801884FC
     vram: 0x801884FC
     binaries: [ov_SC02_000, ov_SC02_003]
+  - id: E_func_80187DB8
+    tier: h_exact
+    hash: 2dfcb44952b0ef59cd8f9a6f45014dc41d7ca790
+    source: src/shared/engine_core.h
+    func: DEFINE_func_80187DB8
+    vram: 0x80187DB8
+    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 4eeed2a459..c74783effa 100644
--- a/src/ov_SC02_000/ov_SC02_000_jr_8018173C.c
+++ b/src/ov_SC02_000/ov_SC02_000_jr_8018173C.c
@@ -4437,48 +4437,7 @@ INCLUDE_ASM("asm/ov_SC02_000/nonmatchings/ov_SC02_000_jr_8018173C", func_80187B4
 
 #include "common.h"
 
-extern s32 func_80187F30(void*, s32);
-extern s32 func_80143BDC(u16*);
-extern s32 func_8012BEE8(s32 a0);
-extern void func_8012C218(void *a0);
-extern u16 D_80126B66;
-
-void func_80187DB8(s32 param_1) {
-    u16 sp10[3];
-
-    *(u16 *)(*(s32 *)(param_1 + 0x20) + 0x12) =
-        *(u16 *)(*(s32 *)(param_1 + 0x20) + 0x12) + 0x100;
-    *(u16 *)(*(s32 *)(param_1 + 0x20) + 0x10) =
-        *(u16 *)(*(s32 *)(param_1 + 0x20) + 0x10) + 0x40;
-    *(u16 *)(*(s32 *)(param_1 + 0x20) + 0x14) =
-        *(u16 *)(*(s32 *)(param_1 + 0x20) + 0x14) + 0x58;
-
-    if (((s32 (*)(s32, s32))func_80187F30)(param_1, 1) != 0) {
-        s32 t0, t1, t2, t3;
-
-        sp10[0] = *(u16 *)(param_1 + 0x6);
-        sp10[1] = *(u16 *)(param_1 + 0xA);
-        sp10[2] = *(u16 *)(param_1 + 0xE);
-        ((void (*)(u16 *))func_80143BDC)(sp10);
-
-        t0 = *(s32 *)(param_1 + 0xE0);
-        t1 = *(s32 *)(param_1 + 0xE4);
-        t2 = *(s32 *)(param_1 + 0xE8);
-        t3 = *(s32 *)(param_1 + 0xDC);
-
-        *(s32 *)(param_1 + 0x4C) = 0;
-        *(s32 *)(param_1 + 0x44) = 0;
-        *(s32 *)(param_1 + 0x10) = t0;
-        *(s32 *)(param_1 + 0x14) = t1;
-        *(s32 *)(param_1 + 0x18) = t2;
-        *(s32 *)(param_1 + 0x48) = t3;
-    }
-
-    if (func_8012BEE8(param_1) == 1 ||
-        (s32)(s16)D_80126B66 - 0x200 < *(s16 *)(param_1 + 0x6)) {
-        func_8012C218((void *)param_1);
-    }
-}
+DEFINE_func_80187DB8()  /* dedup: shared engine-core @0x80187DB8 (src/shared) */
 
 
 extern void func_8012AD80(s32 a0);
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 9724f906fd..9d15523fb5 100644
--- a/src/ov_SC02_003/ov_SC02_003_jr_8018173C.c
+++ b/src/ov_SC02_003/ov_SC02_003_jr_8018173C.c
@@ -3420,7 +3420,7 @@ INCLUDE_ASM("asm/ov_SC02_003/nonmatchings/ov_SC02_003_jr_8018173C", func_8018798
 
 INCLUDE_ASM("asm/ov_SC02_003/nonmatchings/ov_SC02_003_jr_8018173C", func_80187B40);
 
-INCLUDE_ASM("asm/ov_SC02_003/nonmatchings/ov_SC02_003_jr_8018173C", func_80187DB8);
+DEFINE_func_80187DB8()  /* dedup: shared engine-core @0x80187DB8 (src/shared) */
 
 extern void func_8012AD80(s32 a0);
 extern void func_8012C218(void *a0);
diff --git a/src/shared/engine_core.h b/src/shared/engine_core.h
index e21f1338f2..ef028b4093 100644
--- a/src/shared/engine_core.h
+++ b/src/shared/engine_core.h
@@ -62171,6 +62171,43 @@
         return 0; \
     }
 
+#define DEFINE_func_80187DB8() \
+    extern s32 func_80187F30(void*, s32); \
+    extern s32 func_80143BDC(u16*); \
+    extern s32 func_8012BEE8(s32 a0); \
+    extern void func_8012C218(void *a0); \
+    extern u16 D_80126B66; \
+    void func_80187DB8(s32 param_1) { \
+        u16 sp10[3]; \
+        *(u16 *)(*(s32 *)(param_1 + 0x20) + 0x12) = \
+            *(u16 *)(*(s32 *)(param_1 + 0x20) + 0x12) + 0x100; \
+        *(u16 *)(*(s32 *)(param_1 + 0x20) + 0x10) = \
+            *(u16 *)(*(s32 *)(param_1 + 0x20) + 0x10) + 0x40; \
+        *(u16 *)(*(s32 *)(param_1 + 0x20) + 0x14) = \
+            *(u16 *)(*(s32 *)(param_1 + 0x20) + 0x14) + 0x58; \
+        if (((s32 (*)(s32, s32))func_80187F30)(param_1, 1) != 0) { \
+            s32 t0, t1, t2, t3; \
+            sp10[0] = *(u16 *)(param_1 + 0x6); \
+            sp10[1] = *(u16 *)(param_1 + 0xA); \
+            sp10[2] = *(u16 *)(param_1 + 0xE); \
+            ((void (*)(u16 *))func_80143BDC)(sp10); \
+            t0 = *(s32 *)(param_1 + 0xE0); \
+            t1 = *(s32 *)(param_1 + 0xE4); \
+            t2 = *(s32 *)(param_1 + 0xE8); \
+            t3 = *(s32 *)(param_1 + 0xDC); \
+            *(s32 *)(param_1 + 0x4C) = 0; \
+            *(s32 *)(param_1 + 0x44) = 0; \
+            *(s32 *)(param_1 + 0x10) = t0; \
+            *(s32 *)(param_1 + 0x14) = t1; \
+            *(s32 *)(param_1 + 0x18) = t2; \
+            *(s32 *)(param_1 + 0x48) = t3; \
+        } \
+        if (func_8012BEE8(param_1) == 1 || \
+            (s32)(s16)D_80126B66 - 0x200 < *(s16 *)(param_1 + 0x6)) { \
+            func_8012C218((void *)param_1); \
+        } \
+    }
+
 #endif
 
 #define DEFINE_func_80128EA8() \
@@ -153747,4 +153784,41 @@
         return 0; \
     }
 
+#define DEFINE_func_80187DB8() \
+    extern s32 func_80187F30(void*, s32); \
+    extern s32 func_80143BDC(u16*); \
+    extern s32 func_8012BEE8(s32 a0); \
+    extern void func_8012C218(void *a0); \
+    extern u16 D_80126B66; \
+    void func_80187DB8(s32 param_1) { \
+        u16 sp10[3]; \
+        *(u16 *)(*(s32 *)(param_1 + 0x20) + 0x12) = \
+            *(u16 *)(*(s32 *)(param_1 + 0x20) + 0x12) + 0x100; \
+        *(u16 *)(*(s32 *)(param_1 + 0x20) + 0x10) = \
+            *(u16 *)(*(s32 *)(param_1 + 0x20) + 0x10) + 0x40; \
+        *(u16 *)(*(s32 *)(param_1 + 0x20) + 0x14) = \
+            *(u16 *)(*(s32 *)(param_1 + 0x20) + 0x14) + 0x58; \
+        if (((s32 (*)(s32, s32))func_80187F30)(param_1, 1) != 0) { \
+            s32 t0, t1, t2, t3; \
+            sp10[0] = *(u16 *)(param_1 + 0x6); \
+            sp10[1] = *(u16 *)(param_1 + 0xA); \
+            sp10[2] = *(u16 *)(param_1 + 0xE); \
+            ((void (*)(u16 *))func_80143BDC)(sp10); \
+            t0 = *(s32 *)(param_1 + 0xE0); \
+            t1 = *(s32 *)(param_1 + 0xE4); \
+            t2 = *(s32 *)(param_1 + 0xE8); \
+            t3 = *(s32 *)(param_1 + 0xDC); \
+            *(s32 *)(param_1 + 0x4C) = 0; \
+            *(s32 *)(param_1 + 0x44) = 0; \
+            *(s32 *)(param_1 + 0x10) = t0; \
+            *(s32 *)(param_1 + 0x14) = t1; \
+            *(s32 *)(param_1 + 0x18) = t2; \
+            *(s32 *)(param_1 + 0x48) = t3; \
+        } \
+        if (func_8012BEE8(param_1) == 1 || \
+            (s32)(s16)D_80126B66 - 0x200 < *(s16 *)(param_1 + 0x6)) { \
+            func_8012C218((void *)param_1); \
+        } \
+    }
+
 #endif