Where to find Skarmory in Sun, Moon, Ultra Sun & Ultra Moon

SOS Encounter: Route 10, Route 17, Mount Hokulani + 1 more
Walk: Route 17 (15%), Route 10 (10%), Mount Hokulani (10%) + 1 more
Surf: Route 10 (20%)
+ 1 more way

Skarmory also appears in

How to get Skarmory in Sun, Moon, Ultra Sun & Ultra Moon

Its base catch rate is 25 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 Timer Ball or Heavy Ball.

Skarmory in every game · Pokémon Sun, Moon, Ultra Sun & Ultra Moon interactive map (Alola)