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, 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, Ilex Forest, Mt. Silver Base, Violet City, Evolve Poliwhirl (Lv37 or King's Rock)
Route 30, 31, 35, 43, Cherrygrove City, Ilex Forest, Mt. Silver Base, Violet City, Evolve Poliwhirl (Water Stone)
Route 5 (trade), Route 12, 13, 14, 17, 18, 20, 21, 30, 31, 35, Cerulean Cape, Cinnabar Island, Crimson City, Pallet Town, Ruins of Alph, Safari Zone A1, A2, A3, A4, A5, Seafoam Islands, Violet City, Viridian River
Route 30, 31, 35, Blackthorn City, Cerulean Cape, Cherrygrove City, Ilex Forest, Pallet Town, Violet City, Evolve Poliwag (Lv25)
Route 30, 31, 35, Cherrygrove City, Dark Cave, Violet City, Evolve Poliwhirl (Water Stone)
Route 30, 31, 32, 35, Violet City, Evolve Poliwhirl (Lv37 or King's Rock)