SOS Encounter: Brooklet Hill, Malie Garden (Only in Sun & Moon)
Walk: Brooklet Hill (20%), Malie Garden (20%, Only in Sun & Moon)
Surf: Brooklet Hill (40%)
+ 1 more way
Its base catch rate is 255 out of 255 (higher is easier); the catch rate calculator works out your odds with each ball. For the look, the best colour match is Dive Ball.
Evolution: Poliwag → Poliwhirl (Level 25) → Poliwrath (Water Stone) · Politoed.
Poliwag in every game · Pokémon Sun, Moon, Ultra Sun & Ultra Moon interactive map (Alola)