Elite Trainer Mark on X: Onix was Brock's first ever Pokémon. However, it didn't even evolve under his ownership, it evolved into Steelix while his brother Forrest was taking care of it.

Elite Trainer Mark on X: Onix was Brock's first ever Pokémon. However, it didn't even evolve under his ownership, it evolved into Steelix while his brother Forrest was taking care of it.

Brock's Steelix, Pokémon Wiki

If the reason Onix is so weak is because it was Brock's ace, why didn't they just give it a pre-evolution instead? : r/pokemon

Pokémon: All Episodes - Trakt

PokemonPlanet

Pokemon Scarlet And Violet: The Best Pokemon Not Included

Brock's Onix evolved into Steelix, dragon, shorts, anime

REQUEST] What would Steelix's anatomy have to look like to be metallic and still have as low of a mass/volume as it does? : r/theydidthemath

In the Pokemon anime, the attack psychic is probably one of the most broken moves there is, being able to take control of just about of any other Pokemon or move. What's

Brock's Onix evolved into Steelix, dragon, shorts, anime

Pokemon Explained: Brock's MEGA Steelix

Pokémon: The Series — Brock / Characters - TV Tropes

Brock (Masters) - Bulbapedia, the community-driven Pokémon encyclopedia

Brock's Steelix, Pokémon Wiki

Brock's Steelix - Bulbapedia, the community-driven Pokémon encyclopedia