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

Detonado Pokémon HeartGold e SoulSilver

Pokemon Heartgold and Soulsilver In-Game Tier List (MkII)

Pokemon HeartGold & SoulSilver Versions Game Review

Onix generation 4 move learnset & egg move parents (Diamond, Pearl, Platinum, HeartGold, SoulSilver)

Onix - 57/95 - Common - Reverse Holo

Brock and Onix, Pokémon Masters Wiki

2010 Pokemon onix #56 Heartgold & Soulsilver Rev. Foil unleashed KSA 9 Mint

Was playing Soul Silver and encountered a full odds shiny Onix while grinding on Victory road. : r/MandJTV

Pokemon HeartGold and SoulSilver :: The Johto Safari Zone

Steelix, aggron, Onix, sinnoh, ken Sugimori, Brock, pokémon Universe, Pokémon Adventures, Pokémon Omega Ruby and Alpha Sapphire, pokémon Company