Nameran Steelix by CaseyDeanFakemon on DeviantArt

Onix (Pokémon GO) - Best Movesets, Counters, Evolutions and CP

Pokemon Go Onix - Stats, Best Moveset & Max CP - GameWith

How to evolve Onix in 'Pokémon Go' Gen 2: Use the metal coat to get yourself a Steelix

Tropius is pretty much the Onix of Gen 3. Why did GameFreak give it such pathetic stats in the first place? It looks like it should be really strong with a BST

Everything You Need to Know About Pokemon Onix

Onix (Pokémon) - Pokémon Go

Onix DB: stats, moves, locations & evolution

Pokemon Go Best Pokemon: Tier List of the best Pokemon ranked by Attack, Defense and Stamina

Imgur: The magic of the Internet

Pokemon Breeding Simplified (with pictures!) - Page 2 - Work In Progress Guides - PokeMMO