Walk: Diglett’s Tunnel (70%), Lush Jungle (70%, Only in Sun & Moon), Seaward Cave (70%) + 5 more
SOS Encounter: Seaward Cave (15%), Diglett’s Tunnel, Hau’oli Cemetery + 4 more
Gift: Poké Pelago
+ 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 Great Ball or Moon Ball.
Evolution: Zubat → Golbat (Level 22) → Crobat.
Zubat in every game · Pokémon Sun, Moon, Ultra Sun & Ultra Moon interactive map (Alola)