Pokémon World Tournament Junior Cup (Japanese: ポケモンワールドトーナメントジュニアカップ Pokémon World Tournament Junior Cup) is a tournament in the anime that is held in Lacunosa Town. It is hosted by Unova League Champion Alder and Freddy O'Martian. The winner of the tournament gets a chance to battle Alder. The tournament took place from Jostling for the Junior Cup! to Goodbye, Junior Cup - Hello Adventure!.
The Pokémon World Tournament Junior Cup is a 16-competitor tournament consisting of four rounds, and entrants are allowed to switch Pokémon between rounds. All rounds consisted of 1 on 1 battles against randomly matched up Trainers by a computer.