Fellhorn Gorge, Kitakami Road, Mossfell Confluence, Reveler's Road — 4 locations on the interactive map.
Celadon City, Cerulean Cave, Cerulean City, Cinnabar Island, Fuchsia City, Indigo Plateau, Pallet Town, Route 10, Route 11, Route 12, Route 13, Route 17 and 13 more — 25 locations on the interactive map.
Blackthorn City, Ecruteak City, Ilex Forest, Mt. Silver, Route 22, Route 28, Route 30, Route 31, Route 35, Route 43, Route 44, Route 6 and 3 more — 15 locations on the interactive map.
Poliwag → Poliwhirl (Level 25) → Poliwrath (Water Stone) → Politoed (Trade holding Kings Rock)