diff --git a/scripts/generate_pack.py b/scripts/generate_pack.py
index 2142024f..a82bae77 100644
--- a/scripts/generate_pack.py
+++ b/scripts/generate_pack.py
@@ -457,6 +457,7 @@ def _collect_emulator_extras(
     base_dest: str,
     emu_profiles: dict | None = None,
     target_cores: set[str] | None = None,
+    include_all: bool = False,
 ) -> list[dict]:
     """Collect core requirement files from emulator profiles not in the platform pack.
 
@@ -491,7 +492,8 @@ def _collect_emulator_extras(
             norm_map[_norm_system_id(sid)] = sid
 
     undeclared = find_undeclared_files(
-        config, emulators_dir, db, emu_profiles, target_cores=target_cores
+        config, emulators_dir, db, emu_profiles, target_cores=target_cores,
+        include_all=include_all,
     )
     extras = []
     seen_dests: set[str] = set(seen)
diff --git a/tests/test_e2e.py b/tests/test_e2e.py
index 6f1e4532..2bca29ab 100644
--- a/tests/test_e2e.py
+++ b/tests/test_e2e.py
@@ -4480,6 +4480,35 @@ struct BurnDriver BurnDrvneogeo = {
         # Launcher/alias files should still be excluded
         self.assertNotIn("launcher_bios.bin", all_names)
 
+    def test_201_collect_emulator_extras_include_all(self):
+        """include_all=True passes through to find_undeclared_files."""
+        from generate_pack import _collect_emulator_extras
+
+        config = self._load_config("test_existence")
+        profiles = load_emulator_profiles(self.emulators_dir)
+        base_dest = config.get("base_destination", "")
+
+        # Default call must succeed without TypeError
+        extras = _collect_emulator_extras(
+            config, self.emulators_dir, self.db, set(), base_dest, profiles
+        )
+        self.assertIsInstance(extras, list)
+
+        # include_all=True must be accepted and return a list
+        all_extras = _collect_emulator_extras(
+            config, self.emulators_dir, self.db, set(), base_dest, profiles,
+            include_all=True,
+        )
+        self.assertIsInstance(all_extras, list)
+
+        # include_all=True is a superset: at least as many entries as default
+        all_names = {e["name"] for e in all_extras}
+        default_names = {e["name"] for e in extras}
+        self.assertGreaterEqual(len(all_names), len(default_names))
+        # All default entries are present in include_all result
+        for name in default_names:
+            self.assertIn(name, all_names)
+
 
 if __name__ == "__main__":
     unittest.main()