Only in Ultra Sun & Ultra Moon
SOS Encounter: Melemele Meadow
Walk: Melemele Meadow (20%)
Its base catch rate is 225 out of 255 (higher is easier); the catch rate calculator works out your odds with each ball.
Evolution: Flabebe → Floette (Level 19) → Florges.
Flabébé in every game · Pokémon Sun, Moon, Ultra Sun & Ultra Moon interactive map (Alola)