Mitsumi used her Glaceon, along with Infernape and Milotic, in her battle against Jupiter and her Pokémon. Mitsumi's Pokémon were easily able to defeat Jupiter's Pokémon and Jupiter couldn't believe of how strong her Pokémon were because Mitsumi was easily cornered in their previous encounter. Mitsumi referred that the team she had brought was her A-team and that they were strong enough to beat Jupiter.
Mitsumu later used her Glaceon again in the Champion's League. Glaceon used Ice Beam to freeze Hareta's Empoleon's Surf that it used to attack Koya and his Absol in the audience stands.