Gift: Aether Paradise, Ancient Poni Path (Only in Ultra Sun & Ultra Moon)
You won't find Type: Null in the wild in this game — you get it as a gift.
Looking for Silvally? It isn't found in the wild in this game — evolve Type: Null.
For the look, the best colour match is Poké Ball.
Evolution: Type Null → Silvally.
Type: Null in every game · Pokémon Sun, Moon, Ultra Sun & Ultra Moon interactive map (Alola)