How to get Onix (Pokémon Platinum)

Where to get Pokémon #95 Onix

Pokémon Adventures: Diamond and Pearl/Platinum, Vol. 3, Book by Hidenori Kusaka, Satoshi Yamamoto, Official Publisher Page

Pokémon Platinum Walkthrough Part 4: Gym Leader Roark

Onrak #95.167 - FusionDex

Pokémon Platinum Nuzlocke Guide and Tips – Nuzlocke University

How do you evolve Onix in light Platinum?

NPC Changes - Platinum Renegade Wiki

I CAUGHT A SHINY ONIX

Pokemon Platinum :: Full Walkthrough

Pokémon Adventures: Diamond and Pearl/Platinum, Vol. 9, Book by Hidenori Kusaka, Satoshi Yamamoto, Official Publisher Page

Tier List of Pokemon Platinum : r/nuzlocke

Unexpected Shiny Onix during the grind for the Pokémon League. : r/PokemonHGSS