Route 4, 7, 10, 12, 13, 14, 15, 17, 19, 22, 23, 24, 35, Berry Forest, Boon Island, Cerulean Cape, Cerulean Cave, Cerulean City, Chrono Island, Cinnabar Island, Crimson City, Pallet Town, Ruins of Alph, Safari Zone A1, A2, A3, A4, A5, Seafoam Islands, Treasure Beach, Vermillion City, Viridian River
Route 35, Berry Forest, Brine Road, Cerulean Cave, Safari Zone A1, A2, A3, A4, A5, Seafoam Islands, Evolve Psyduck (Lv33)