RE: Pokémon: Phantom Academy | Chapter III : Chapter of Bolt
When Berri entered the battle arena it was too, fully decorated.
Snacks, games, and entertainers were on a raised platform along with all the students. In a square crater in the middle of the arena, a battle was taking place between Light and his Archeops and a random trainer with a Conkeldurr.
Valentine was standing at the fence that separated the raised platform from the battle.
Berri walked up to her.
Berri: "Aunt Valentine. Here's the thing you asked for."
Valentine: "Thank you darling."
Berri handed Valentine the package. She unwrapped it, showing a PokeBall case. She took out three Pokeballs and handed it back to Berri.