SOS Encounter: Vast Poni Canyon
Walk: Vast Poni Canyon (20%)
Its base catch rate is 90 out of 255 (higher is easier); the catch rate calculator works out your odds with each ball.
Evolution: Rockruff → Lycanroc (Level 25).
Lycanroc in every game · Pokémon Sun, Moon, Ultra Sun & Ultra Moon interactive map (Alola)