|Abilities||Rock Head, Sturdy, Sheer Force (Hidden)|
|Episode First Shown in||Nerves Of Steelix!|
|First Known Owner||Jasmine|
|First Game Appeared in|
|National Dex Number||#208|
Steelix evolves from Onix when traded holding a Metal Coat. Steelix is the final evolved form of Onix.
Steelix looks like a giant snake. It's body is made out of steel boulders. Every other boulder, there is something different than the rest. The first is it's head while the last's is a spike. On the ones in the middle, spikes come out of either side. It had white eyes with a red iris and black pupils.
- Jasmine has a Steelix.
- Jasmine's Steelix appeared in Vs. Steelix.
- It returned to compete in the Gym Leader Tournament in Gym Leader Tournament 1.
- Harrison's Steelix appeared in Vs. Harrison 2. It is Male due to gender differences.
- Barbara's Steelix appeared in Vs. Battle Pike.
- Joe's Steelix evolved from Onix prior to Oops, It's Just Steve Again.
- Steelix engages in an induced Mega Evolution by a glass gem.
- Steelix is the main Pokémon of Zero Suit Samus.
- Brock,s Onix will later evolve into Steelix as mentioned by the creator of the series.
- Thunder Fang
- Ice Fang
- Fire Fang
- Mud Sport
- Rock Throw
- Rock Tomb
- Stealth Rock
- Rock Polish
- Smack Down
- Dragon Breath
- Rock Slide
- Sand Tomb
- Iron Tail
- Double Edge
- Stone Edge