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) or simply the 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 tournament begins with an exhibition match between Cynthia and Caitlin. All Trainers are given a keyring for participating, while 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 Single Battles against randomly matched up Trainers by a computer.