SOS Encounter: Route 3
Walk: Route 3 (30%)
Its base catch rate is 190 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 Nest Ball or Safari Ball.
Evolution: Mankey → Primeape (Level 28).
Mankey in every game · Pokémon Sun, Moon, Ultra Sun & Ultra Moon interactive map (Alola)