Roaming Sevii Islands (static), Route 4, 14, 15, 17, 18, 20, 21, 22, 23, 24, 30, 31, 35, 42, 43, 44, Bond Bridge, Boon Island, Brine Road, Celadon City, Cerulean Cape, Cerulean Cave, Chrono Island, Cinnabar Island, Crimson City, Kin Island, Mt. Mortar, P2 Laboratory, Pallet Town, Ruins of Alph, Safari Zone A1, A2, A4, Seafoam Islands, Slowpoke Well, Violet City, Viridian River, Water Labyrinth
Route 13, 14, 19, 21, 23, 24, 26, Safari Zone A5, Seafoam Islands, Evolve Feebas (Lv35 or Prism Scale)