Alolan Onix by BigBadSkullBoss on DeviantArt

All Pokemon Light Platinum Cheats (Complete List)

Onix - Pokemon Diamond, Pearl and Platinum Guide - IGN

Pokémon Platinum Nuzlocke Guide and Tips – Nuzlocke University

Custom / Edited - Pokémon Generation 1 Customs - #095 Onix - The Spriters Resource

Pokémon Adventures: Diamond and Pearl/Platinum, Vol. 4, Book by Hidenori Kusaka, Satoshi Yamamoto, Official Publisher Page

Onix, Pokémon Wiki

Platinum Necrostevo's Pokéblog

Oneon #95.290 - FusionDex

Onix Reverse - Pokémon Go Pokémon card 036/078

Oreburgh Mine - Bulbapedia, the community-driven Pokémon encyclopedia