Brandon's Registeel (Japanese: ジンダイレジアイス Jindai's Registeel) is the second Pokémon owned by Pyramid King Brandon that was seen. He obtained it prior to the episode Overjoyed!
In Overjoyed! Ash returns to the Battle Pyramid to challenge Brandon. Brandon reveals that he will be using Registeel in the battle. The next day Ash pits his Torkoal against Registeel. Registeel is shown to be an extremely mobile Pokémon, as it was seen charging at Torkoal. Although Torkoal clearly had the type advantage, Registeel has incredible defensive capabilities and was able to evenly match Torkoal. Brandon's main strategy with Registeel seems to be offensive and defensive combined into one. Although Torkoal managed to put up a strong fight and match Registeel in power, Registeel ultimately proved victorious.
Registeel was next seen in Pace - The Final Frontier! alongside Regirock where the two of them confronted Team Rocket and used their Hyper Beam attacks to sending Team Rocket blasting off.