Platinum Necrostevo's Pokéblog

9 Ways to Evolve Onix - wikiHow

Shiny Encounter in Renegade Platinum!!! : r/nuzlocke

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

Does Onix evolve into Steelix? - Quora

Onrak #95.167 - FusionDex

Pokemon Platinum Part #31 - Anal Cave City

Following the Trend, here's every Pokemon you can get in Pokemon Platinum before the first gym. : r/pokemon

Pokemon platinum extreme random nuzlocke - Lets Plays/Videos - The Pokemon Insurgence Forums

Pokemon - Onix (84) - Legendary Collection : Toys & Games

Research - How many Pokemon are obtainable in each title?