SOS Encounter: Ten Carat Hill
Walk: Ten Carat Hill (30%)
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 Quick Ball or Moon Ball.
Evolution: Roggenrola → Boldore (Level 25) → Gigalith (Trade).
Roggenrola in every game · Pokémon Sun, Moon, Ultra Sun & Ultra Moon interactive map (Alola)