Quagsire was sent out, along with Rocky's Walrein, in a Double Battle against Ash's Grovyle and Pikachu. Pikachu launched its Thunderbolt on Walrein, but Quagsire stood in his path and took the hit. Being a Ground-type Pokémon, Quagsire took no damage. Just as Grovyle was to use Leaf Blade on Quagsire and Pikachu to use Iron Tail on Walrein, Quagsire and Walrein swapped sides. This caused Pikachu and Grovyle to bump into each other and their attacks failed. In a final attack, Pikachu used Thunderbolt on Walrein; Quagsire stood in Walrein's defense and took no damage from the attack. However, immediately after, Grovyle used Leaf Blade and defeated Quagsire.
None of Quagsire's moves are known.