Only in Ultra Sun & Ultra Moon
SOS Encounter: Route 1, Poni Grove
Walk: Poni Grove (50%), Route 1 (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 Luxury Ball.
Evolution: Buneary → Lopunny.
Buneary in every game · Pokémon Sun, Moon, Ultra Sun & Ultra Moon interactive map (Alola)