Only in Ultra Sun & Ultra Moon
SOS Encounter: Route 11 (15%), Poni Grove (15%), Poni Plains (15%)
Its base catch rate is 45 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 Repeat Ball, Luxury Ball or Timer Ball.
Evolution: Pikipek → Trumbeak (Level 14) → Toucannon (Level 28).
Toucannon in every game · Pokémon Sun, Moon, Ultra Sun & Ultra Moon interactive map (Alola)