diff --git a/config/dedup.us.yaml b/config/dedup.us.yaml
index 5b649cf94..d675fdc41 100644
--- a/config/dedup.us.yaml
+++ b/config/dedup.us.yaml
@@ -14600,3 +14600,10 @@ groups:
     func: DEFINE_func_80185F24
     vram: 0x80185F24
     binaries: [ov_SC02_000, ov_SC02_003]
+  - id: E_func_8017DD7C
+    tier: h_exact
+    hash: fc81e68ce00bfd54ccd26581d16837d15efef9ac
+    source: src/shared/engine_core.h
+    func: DEFINE_func_8017DD7C
+    vram: 0x8017DD7C
+    binaries: [ov_SC04_018, ov_SC04_019, ov_SC05_017]
diff --git a/src/ov_SC04_018/ov_SC04_018_jr_8017AE2C.c b/src/ov_SC04_018/ov_SC04_018_jr_8017AE2C.c
index 421c21107..1b36a01c5 100644
--- a/src/ov_SC04_018/ov_SC04_018_jr_8017AE2C.c
+++ b/src/ov_SC04_018/ov_SC04_018_jr_8017AE2C.c
@@ -4510,30 +4510,7 @@ s32 func_8017DCE8(void) {
 INCLUDE_ASM("asm/ov_SC04_018/nonmatchings/ov_SC04_018_jr_8017AE2C", func_8017DD0C);
 
 
-extern void func_800D1E28(void);
-extern s32 func_800D1D94(void);
-extern void func_8002D4C8(s32 a0, s32 a1);
-extern void func_8001BFD0(void);
-extern void func_800D0C48(s32 a0);
-
-s32 func_8017DD7C(s32 a0) {
-
-    extern s16 D_800B9A0A;
-    s16 s0;
-
-    if (--(*(s32 *)(a0 + 0x28)) == -1) {
-        func_800D1E28();
-        s0 = D_800B9A0A;
-        if (s0 != 0x1000 || (s16)func_800D1D94() != s0) {
-            func_8002D4C8(0x1C, 0);
-            func_8001BFD0();
-            func_8002D4C8(0x1D, 0);
-            func_800D0C48(1);
-        }
-        *(u8 *)(a0 + 0x15) += 1;
-    }
-    return 0;
-}
+DEFINE_func_8017DD7C()  /* dedup: shared engine-core @0x8017DD7C (src/shared) */
 
 
 extern void func_800D1EBC(void);
diff --git a/src/ov_SC04_019/ov_SC04_019_jr_8017AE2C.c b/src/ov_SC04_019/ov_SC04_019_jr_8017AE2C.c
index 0b8897b0c..331fbfe8e 100644
--- a/src/ov_SC04_019/ov_SC04_019_jr_8017AE2C.c
+++ b/src/ov_SC04_019/ov_SC04_019_jr_8017AE2C.c
@@ -4505,30 +4505,7 @@ s32 func_8017DCE8(void) {
 INCLUDE_ASM("asm/ov_SC04_019/nonmatchings/ov_SC04_019_jr_8017AE2C", func_8017DD0C);
 
 
-extern void func_800D1E28(void);
-extern s32 func_800D1D94(void);
-extern void func_8002D4C8(s32 a0, s32 a1);
-extern void func_8001BFD0(void);
-extern void func_800D0C48(s32 a0);
-
-s32 func_8017DD7C(s32 a0) {
-
-    extern s16 D_800B9A0A;
-    s16 s0;
-
-    if (--(*(s32 *)(a0 + 0x28)) == -1) {
-        func_800D1E28();
-        s0 = D_800B9A0A;
-        if (s0 != 0x1000 || (s16)func_800D1D94() != s0) {
-            func_8002D4C8(0x1C, 0);
-            func_8001BFD0();
-            func_8002D4C8(0x1D, 0);
-            func_800D0C48(1);
-        }
-        *(u8 *)(a0 + 0x15) += 1;
-    }
-    return 0;
-}
+DEFINE_func_8017DD7C()  /* dedup: shared engine-core @0x8017DD7C (src/shared) */
 
 
 extern void func_800D1EBC(void);
diff --git a/src/ov_SC05_017/ov_SC05_017_jr_8017AE2C.c b/src/ov_SC05_017/ov_SC05_017_jr_8017AE2C.c
index 8b77971f3..2c2d82a1e 100644
--- a/src/ov_SC05_017/ov_SC05_017_jr_8017AE2C.c
+++ b/src/ov_SC05_017/ov_SC05_017_jr_8017AE2C.c
@@ -4517,30 +4517,7 @@ s32 func_8017DCE8(void) {
 INCLUDE_ASM("asm/ov_SC05_017/nonmatchings/ov_SC05_017_jr_8017AE2C", func_8017DD0C);
 
 
-extern void func_800D1E28(void);
-extern s32 func_800D1D94(void);
-extern void func_8002D4C8(s32 a0, s32 a1);
-extern void func_8001BFD0(void);
-extern void func_800D0C48(s32 a0);
-
-s32 func_8017DD7C(s32 a0) {
-
-    extern s16 D_800B9A0A;
-    s16 s0;
-
-    if (--(*(s32 *)(a0 + 0x28)) == -1) {
-        func_800D1E28();
-        s0 = D_800B9A0A;
-        if (s0 != 0x1000 || (s16)func_800D1D94() != s0) {
-            func_8002D4C8(0x1C, 0);
-            func_8001BFD0();
-            func_8002D4C8(0x1D, 0);
-            func_800D0C48(1);
-        }
-        *(u8 *)(a0 + 0x15) += 1;
-    }
-    return 0;
-}
+DEFINE_func_8017DD7C()  /* dedup: shared engine-core @0x8017DD7C (src/shared) */
 
 
 extern void func_800D1EBC(void);
diff --git a/src/shared/engine_core.h b/src/shared/engine_core.h
index 26dbe12bf..608d798ee 100644
--- a/src/shared/engine_core.h
+++ b/src/shared/engine_core.h
@@ -60501,6 +60501,29 @@
         } \
     }
 
+#define DEFINE_func_8017DD7C() \
+    extern void func_800D1E28(void); \
+    extern s32 func_800D1D94(void); \
+    extern void func_8002D4C8(s32 a0, s32 a1); \
+    extern void func_8001BFD0(void); \
+    extern void func_800D0C48(s32 a0); \
+    s32 func_8017DD7C(s32 a0) { \
+        extern s16 D_800B9A0A; \
+        s16 s0; \
+        if (--(*(s32 *)(a0 + 0x28)) == -1) { \
+            func_800D1E28(); \
+            s0 = D_800B9A0A; \
+            if (s0 != 0x1000 || (s16)func_800D1D94() != s0) { \
+                func_8002D4C8(0x1C, 0); \
+                func_8001BFD0(); \
+                func_8002D4C8(0x1D, 0); \
+                func_800D0C48(1); \
+            } \
+            *(u8 *)(a0 + 0x15) += 1; \
+        } \
+        return 0; \
+    }
+
 #endif
 
 #define DEFINE_func_80128EA8() \
@@ -150407,4 +150430,27 @@
         } \
     }
 
+#define DEFINE_func_8017DD7C() \
+    extern void func_800D1E28(void); \
+    extern s32 func_800D1D94(void); \
+    extern void func_8002D4C8(s32 a0, s32 a1); \
+    extern void func_8001BFD0(void); \
+    extern void func_800D0C48(s32 a0); \
+    s32 func_8017DD7C(s32 a0) { \
+        extern s16 D_800B9A0A; \
+        s16 s0; \
+        if (--(*(s32 *)(a0 + 0x28)) == -1) { \
+            func_800D1E28(); \
+            s0 = D_800B9A0A; \
+            if (s0 != 0x1000 || (s16)func_800D1D94() != s0) { \
+                func_8002D4C8(0x1C, 0); \
+                func_8001BFD0(); \
+                func_8002D4C8(0x1D, 0); \
+                func_800D0C48(1); \
+            } \
+            *(u8 *)(a0 + 0x15) += 1; \
+        } \
+        return 0; \
+    }
+
 #endif