diff --git a/config/dedup.us.yaml b/config/dedup.us.yaml
index 658611ec3..60e141b66 100644
--- a/config/dedup.us.yaml
+++ b/config/dedup.us.yaml
@@ -14971,3 +14971,10 @@ groups:
     func: DEFINE_func_80186424
     vram: 0x80186424
     binaries: [ov_SC02_000, ov_SC02_003]
+  - id: E_func_80183814
+    tier: h_exact
+    hash: 7a31a7eddbb172b8c3239b58061f746ce286b5e2
+    source: src/shared/engine_core.h
+    func: DEFINE_func_80183814
+    vram: 0x80183814
+    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 6fccd71c5..023ad43b9 100644
--- a/src/ov_SC02_000/ov_SC02_000_jr_8018173C.c
+++ b/src/ov_SC02_000/ov_SC02_000_jr_8018173C.c
@@ -3309,74 +3309,7 @@ void func_80183754(s32 *a0) {
 
 #include "common.h"
 
-extern s32 func_80012F74(s32 a0, s32 a1, s32 a2, s32 a3);
-extern s32 func_80171CC4(void *a0, void *a1);
-extern void func_80181D0C(void);
-extern void func_80181C10(void);
-extern void func_80175414(s32 _arg0);
-extern void func_801839C4(void *a0);
-extern void func_80183BA4(void *a0);
-extern void func_80183C9C(s32 a0);
-extern void func_800D1724(s32 a0);
-extern s16 D_800B9AAC[];
-extern s16 D_801274E8;
-extern u8 D_8018EDC8[];
-extern u8 D_8018EA48[];
-extern s32 D_801E8770;
-
-void func_80183814(void *a0_) {
-    register void *a0 __asm__("$17") = a0_;
-    s16 state;
-    s16 v;
-
-    state = *(s16 *)((s32)a0 + 0xE);
-    if (state >= 0x1391) {
-        *(u16 *)((s32)a0 + 0xAE) = 0x8080;
-        *(u16 *)((s32)a0 + 0xAA) &= 0x5FBF;
-        *(u16 *)((s32)a0 + 0xAC) &= 0x5FBF;
-        func_80171CC4(a0, D_8018EDC8);
-        D_801274E8 = *(u16 *)((s32)a0 + 0x6);
-    } else if (state < -0x1700) {
-        s16 *p = &D_801274E8;
-        *p = (s16)func_80012F74(*p, 0, 10, 1);
-    }
-
-    switch (*(s32 *)((s32)a0 + 0x208)) {
-    case 0:
-        if (*(s16 *)((s32)a0 + 0xE) < 0x1700) {
-            func_80181D0C();
-            *(s32 *)((s32)a0 + 0x208) += 1;
-        }
-        break;
-    case 1:
-        if (*(s16 *)((s32)a0 + 0xE) < 0x1380) {
-            func_80181C10();
-            *(s32 *)((s32)a0 + 0x208) += 1;
-            ((void (*)(void))func_80175414)();
-        }
-        break;
-    }
-
-    if (*(s32 *)((s32)a0 + 0x204) != 0) {
-        *(s32 *)((s32)a0 + 0x204) -= 1;
-        return;
-    }
-
-    func_801839C4(a0);
-    func_80183BA4(a0);
-    func_80183C9C((s32)a0);
-
-    if ((u32)(*(u16 *)((s32)a0 + 0xE) - 1) < 0xEFF) {
-        D_800B9AAC[0] = 0x7FFF;
-    }
-
-    v = *(s16 *)((s32)a0 + 0xE);
-    if (v < 0 && v < -0x1950) {
-        if (D_801E8770 != 0) {
-            func_800D1724((s32)D_8018EA48);
-        }
-    }
-}
+DEFINE_func_80183814()  /* dedup: shared engine-core @0x80183814 (src/shared) */
 
 
 void func_801839C4(void *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 acc93c9c2..bb188b3e6 100644
--- a/src/ov_SC02_003/ov_SC02_003_jr_8018173C.c
+++ b/src/ov_SC02_003/ov_SC02_003_jr_8018173C.c
@@ -3064,7 +3064,7 @@ void func_80183718(void *a0) {
 
 INCLUDE_ASM("asm/ov_SC02_003/nonmatchings/ov_SC02_003_jr_8018173C", func_80183754);
 
-INCLUDE_ASM("asm/ov_SC02_003/nonmatchings/ov_SC02_003_jr_8018173C", func_80183814);
+DEFINE_func_80183814()  /* dedup: shared engine-core @0x80183814 (src/shared) */
 
 
 void func_801839C4(void *a0) {
diff --git a/src/shared/engine_core.h b/src/shared/engine_core.h
index 963385b52..3190d6631 100644
--- a/src/shared/engine_core.h
+++ b/src/shared/engine_core.h
@@ -61651,6 +61651,69 @@
         D_801E8278 = vec.c; \
     }
 
+#define DEFINE_func_80183814() \
+    extern s32 func_80012F74(s32 a0, s32 a1, s32 a2, s32 a3); \
+    extern s32 func_80171CC4(void *a0, void *a1); \
+    extern void func_80181D0C(void); \
+    extern void func_80181C10(void); \
+    extern void func_80175414(s32 _arg0); \
+    extern void func_801839C4(void *a0); \
+    extern void func_80183BA4(void *a0); \
+    extern void func_80183C9C(s32 a0); \
+    extern void func_800D1724(s32 a0); \
+    extern s16 D_800B9AAC[]; \
+    extern s16 D_801274E8; \
+    extern u8 D_8018EDC8[]; \
+    extern u8 D_8018EA48[]; \
+    extern s32 D_801E8770; \
+    void func_80183814(void *a0_) { \
+        register void *a0 __asm__("$17") = a0_; \
+        s16 state; \
+        s16 v; \
+        state = *(s16 *)((s32)a0 + 0xE); \
+        if (state >= 0x1391) { \
+            *(u16 *)((s32)a0 + 0xAE) = 0x8080; \
+            *(u16 *)((s32)a0 + 0xAA) &= 0x5FBF; \
+            *(u16 *)((s32)a0 + 0xAC) &= 0x5FBF; \
+            func_80171CC4(a0, D_8018EDC8); \
+            D_801274E8 = *(u16 *)((s32)a0 + 0x6); \
+        } else if (state < -0x1700) { \
+            s16 *p = &D_801274E8; \
+            *p = (s16)func_80012F74(*p, 0, 10, 1); \
+        } \
+        switch (*(s32 *)((s32)a0 + 0x208)) { \
+        case 0: \
+            if (*(s16 *)((s32)a0 + 0xE) < 0x1700) { \
+                func_80181D0C(); \
+                *(s32 *)((s32)a0 + 0x208) += 1; \
+            } \
+            break; \
+        case 1: \
+            if (*(s16 *)((s32)a0 + 0xE) < 0x1380) { \
+                func_80181C10(); \
+                *(s32 *)((s32)a0 + 0x208) += 1; \
+                ((void (*)(void))func_80175414)(); \
+            } \
+            break; \
+        } \
+        if (*(s32 *)((s32)a0 + 0x204) != 0) { \
+            *(s32 *)((s32)a0 + 0x204) -= 1; \
+            return; \
+        } \
+        func_801839C4(a0); \
+        func_80183BA4(a0); \
+        func_80183C9C((s32)a0); \
+        if ((u32)(*(u16 *)((s32)a0 + 0xE) - 1) < 0xEFF) { \
+            D_800B9AAC[0] = 0x7FFF; \
+        } \
+        v = *(s16 *)((s32)a0 + 0xE); \
+        if (v < 0 && v < -0x1950) { \
+            if (D_801E8770 != 0) { \
+                func_800D1724((s32)D_8018EA48); \
+            } \
+        } \
+    }
+
 #endif
 
 #define DEFINE_func_80128EA8() \
@@ -152707,4 +152770,67 @@
         D_801E8278 = vec.c; \
     }
 
+#define DEFINE_func_80183814() \
+    extern s32 func_80012F74(s32 a0, s32 a1, s32 a2, s32 a3); \
+    extern s32 func_80171CC4(void *a0, void *a1); \
+    extern void func_80181D0C(void); \
+    extern void func_80181C10(void); \
+    extern void func_80175414(s32 _arg0); \
+    extern void func_801839C4(void *a0); \
+    extern void func_80183BA4(void *a0); \
+    extern void func_80183C9C(s32 a0); \
+    extern void func_800D1724(s32 a0); \
+    extern s16 D_800B9AAC[]; \
+    extern s16 D_801274E8; \
+    extern u8 D_8018EDC8[]; \
+    extern u8 D_8018EA48[]; \
+    extern s32 D_801E8770; \
+    void func_80183814(void *a0_) { \
+        register void *a0 __asm__("$17") = a0_; \
+        s16 state; \
+        s16 v; \
+        state = *(s16 *)((s32)a0 + 0xE); \
+        if (state >= 0x1391) { \
+            *(u16 *)((s32)a0 + 0xAE) = 0x8080; \
+            *(u16 *)((s32)a0 + 0xAA) &= 0x5FBF; \
+            *(u16 *)((s32)a0 + 0xAC) &= 0x5FBF; \
+            func_80171CC4(a0, D_8018EDC8); \
+            D_801274E8 = *(u16 *)((s32)a0 + 0x6); \
+        } else if (state < -0x1700) { \
+            s16 *p = &D_801274E8; \
+            *p = (s16)func_80012F74(*p, 0, 10, 1); \
+        } \
+        switch (*(s32 *)((s32)a0 + 0x208)) { \
+        case 0: \
+            if (*(s16 *)((s32)a0 + 0xE) < 0x1700) { \
+                func_80181D0C(); \
+                *(s32 *)((s32)a0 + 0x208) += 1; \
+            } \
+            break; \
+        case 1: \
+            if (*(s16 *)((s32)a0 + 0xE) < 0x1380) { \
+                func_80181C10(); \
+                *(s32 *)((s32)a0 + 0x208) += 1; \
+                ((void (*)(void))func_80175414)(); \
+            } \
+            break; \
+        } \
+        if (*(s32 *)((s32)a0 + 0x204) != 0) { \
+            *(s32 *)((s32)a0 + 0x204) -= 1; \
+            return; \
+        } \
+        func_801839C4(a0); \
+        func_80183BA4(a0); \
+        func_80183C9C((s32)a0); \
+        if ((u32)(*(u16 *)((s32)a0 + 0xE) - 1) < 0xEFF) { \
+            D_800B9AAC[0] = 0x7FFF; \
+        } \
+        v = *(s16 *)((s32)a0 + 0xE); \
+        if (v < 0 && v < -0x1950) { \
+            if (D_801E8770 != 0) { \
+                func_800D1724((s32)D_8018EA48); \
+            } \
+        } \
+    }
+
 #endif