Filter out Max Raid den routes from Sword/Shield game data

Den child routes (~561 per game) bloated the route list without being
useful for Nuzlocke tracking. Adds filter_den_routes() to strip children
matching "(Den " from the route hierarchy, reducing Sw/Sh from ~1,007
to 446 routes each.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

tools/import-pokedb/import_pokedb/__main__.py

@@ -19,7 +19,7 @@ from pathlib import Path
 from .loader import load_pokedb_data, load_seed_config
 from .mappings import PokemonMapper, LocationMapper, build_version_map, map_encounter_method
 from .output import sort_routes, merge_special_encounters, write_game_json, write_games_json, write_pokemon_json
-from .processing import filter_encounters_for_game, process_encounters, build_routes
+from .processing import filter_encounters_for_game, process_encounters, build_routes, filter_den_routes
 from .sprites import download_all_sprites, download_sprites
 
 SEEDS_DIR_CANDIDATES = [
@@ -200,6 +200,10 @@ def main(argv: list[str] | None = None) -> None:
         # Build route hierarchy
         routes = build_routes(encounters_by_area, location_mapper)
 
+        # Filter out Max Raid den child routes (Sword/Shield only)
+        if vg_key == "sword-shield":
+            routes = filter_den_routes(routes)
+
         # Merge special encounters (starters, gifts, fossils)
         routes = merge_special_encounters(routes, config, vg_key, pokemon_mapper)
 

tools/import-pokedb/import_pokedb/processing.py

@@ -341,3 +341,15 @@ def build_routes(
                 ))
 
     return routes
+
+
+def filter_den_routes(routes: list[Route]) -> list[Route]:
+    """Remove Max Raid den child routes from the route list.
+
+    Dens are identified by "(Den " in the child route name.
+    Only children are filtered — parent routes are kept.
+    """
+    for route in routes:
+        if route.children:
+            route.children = [c for c in route.children if "(Den " not in c.name]
+    return routes