Grusha's Altaria is
Grusha's main partner Pokémon. It is able to Terastallize into an Ice Tera Type.
Terastal Practical Application Test VS Liko
Liko's Floragato used Magical Leaf in
Grusha's Cetitan mouth making it hard to use moves, so
Grusha recalled it and swapped it with
Grusha's Altaria. Altaria had the type advantage and the skill advantage, so when it came down to them both Terastallizing, Altaria was still more powerful and it defeated Floragato, making
Liko lose the battle.