Evolving Onix into Steelix requires a special item : r/pokemongo

Onix (Pokémon) - Bulbapedia, the community-driven Pokémon encyclopedia, onix pokémon go

How Do I Evolve Onix in Pokemon GO? - Playbite

All trade evolutions in Pokemon Brilliant Diamond & Shining Pearl - Dexerto

Soilix Onix Pre Evolution by Hyperagua on DeviantArt, onix pokemon evolution

Evolving Onix into Steelix requires a special item : r/pokemongo, onix pokemon go

Idea to add Crystal Onix from the anime in special research : r/pokemongo, onix pokemon go

Should I evolve this guy or not? I read somewhere that Onix as a rock type is more useful than Steelix. : r/pokemongobrag

How can players obtain rare Pokémon and special items (like evolution stones) in Pokémon GO? - Quora

The Best Pokemon and Items to Save for Pokemon Go's Second Generation

Onix (Pokémon) - Bulbapedia, the community-driven Pokémon encyclopedia, onix pokémon go

Pokemon Go' Special Items: Drop Rates & How to Find Them

Pokemon Go - NEW Evolves! Start saving candy MEGA ONIX and 5 other EPIC evolves , onix pokemon evolution

Onix (Pokémon) - Bulbapedia, the community-driven Pokémon encyclopedia, onix pokémon go