Route 5 (trade), Route 2, 4, 7, 10, 12, 13, 14, 15, 17, 19, 20, 21, 22, 23, 24, 30, 31, 35, 43, 44, Blackthorn City, Cerulean Cape, Cerulean Cave, Cerulean City, Cinnabar Island, Crimson City, Ilex Forest, Mt. Silver Base, Pallet Town, Ruins of Alph, Safari Zone A1, A2, A3, A4, A5, Treasure Beach, Vermillion City, Violet City, Viridian River
Route 6, 8, 14, 15, 22, 23, 24, 30, 31, 35, 43, 44, Blackthorn City, Cerulean Cape, Cherrygrove City, Crimson City, Ilex Forest, Mt. Silver Base, Pallet Town, Safari Zone A1, A2, A3, A4, Violet City, Evolve Poliwag (Lv25)
Route 30, 31, 35, 43, Cherrygrove City, Ilex Forest, Mt. Silver Base, Violet City, Evolve Poliwhirl (Water Stone)
Route 30, 31, 35, 43, Ilex Forest, Mt. Silver Base, Violet City, Evolve Poliwhirl (Lv37 or King's Rock)
Route 3 (gift), Route 4, 10, 12, 13, 14, 15, 17, 19, 20, 21, 22, 23, 24, 26, 27, 30, 31, 32, 34, 35, 42, 43, 44, Blackthorn City, Bond Bridge, Boon Island, Brine Road, Celadon City, Celadon Sewers, Cerulean Cape, Cerulean Cave, Cerulean City, Chrono Island, Cinnabar Island, Crimson City, Dark Cave, Dragon's Den, Ilex Forest, Kin Island, Kindle Road, Knot Island, Lake of Rage, Mt. Mortar, Mt. Silver Base, Offshore Road, P2 Laboratory, Pallet Town, Resort Gorgeous, Ruins of Alph, Safari Zone A1, A2, A3, A4, A5, Slowpoke Well, Tohjo Falls, Treasure Beach, Union Cave, Vermillion City, Violet City, Viridian River, Water Labyrinth
Deep Sea (static), Route 4, 10, 12, 13, 17, 19, 20, 22, 23, 24, Cerulean Cape, Cerulean Cave, Cerulean City, Cinnabar Island, Crimson City, Lake of Rage, Offshore Road, Ruins of Alph, Treasure Beach, Vermillion City, Evolve Magikarp (Lv20)