After the heroes came to Virgil's house, Virgil sent his Pokémon, including Jolteon, who was a part of his team. Jolteon was sent out, along with Ash's Pikachu, to help power up generator that had low power. It was also shown to break five Cryogonal's Light Screen.[1]
Jolteon was also used off-screen in the battle against Russet and Dino.[2]