Only in Ultra Sun & Ultra Moon
SOS Encounter: Route 15 (30%), Hau'oli City (30%), Melemele Sea (30%)
Its base catch rate is 60 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 Dream Ball, Love Ball or Heal Ball.
Evolution: Clamperl → Huntail · Gorebyss.
Gorebyss in every game · Pokémon Sun, Moon, Ultra Sun & Ultra Moon interactive map (Alola)