Byron's Steelix was one of Byron's strongest Pokémon. It is voiced by Unshō Ishizuka who plays the Narrator in the Japanese version in both the Japanese and English-language anime.
Steelix was first seen in a flashback in Shield with a Twist where it was shown battling Barry's Empoleon. Steelix lost the battle.
Steelix later appeared in Dealing with Defensive Types where it showed great power in battle by easily defeating Ash's Buizel despite its type disadvantage.
Steelix then battled Chimchar but the Fire Monkey Pokemon managed to dodge Steelix's attacks and used Dig to weaken the battlefield. Due to Steelix's massive weight, the ground beneath it eventually collapsed and Steelix was defeated by Chimchar's Flame Wheel.
|Iron Tail||Dealing with Defensive Types|
|Screech||Dealing with Defensive Types|
|Bind||Dealing With Defensive Types|
|+ indicates this Pokémon used this move recently.*|
- indicates this Pokémon normally can't use this move.