Pokémon HeartGold Blog Chapter 24

Pokemon 95 Onix Pokedex: Evolution, Moves, Location, Stats

Pokemon 4095 Crystal Onix Pokedex: Evolution, Moves, Location, Stats

Utilities - Pokemon HeartGold & Soulsilver Multiple Tools

Pokémon Adventures: HeartGold and SoulSilver, Vol. 2, Book by Hidenori Kusaka, Satoshi Yamamoto, Official Publisher Page

Onix - #095; Heartgold Soulsilver Unleashed Set (57/95); Common; Illustration: Masakazu Fukuda

Brock and Onix, Pokémon Masters Wiki

Twitch Plays Pokémon HeartGold / Awesome - TV Tropes

Rewatching the original show and replaying HeartGoldmy big snake boi deserves justice GameFreak : r/pokemon

Onix (Pokémon) - Bulbapedia, the community-driven Pokémon encyclopedia

Is This Pokémon Couple as Suggestive in Japanese? « Legends of Localization