Only in Moon & Ultra Moon
SOS Encounter: Mount Lanakila, Tapu Village
Unknown: Mount Lanakila, Tapu Village
Looking for Sandslash? It isn't found in the wild in this game — evolve Sandshrew (Level 22).
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 Ultra Ball.
Evolution: Sandshrew → Sandslash (Level 22).
Sandshrew in every game · Pokémon Sun, Moon, Ultra Sun & Ultra Moon interactive map (Alola)