Challenge Cup (Japanese: チャレンジカップ Challenge Cup) is one of the four Stadium Cups in Pokémon Stadium 2. Unlike the other five Stadium Cups, however, players cannot use their own Pokémon, instead being handed a random rental team each time they begin a challenge.
The Cup has four different classes, each featuring different leveled Pokémon. What remains the same, however, is that the Pokémon that are used all have strange nicknames. Any Pokémon controlled by the player will have a nickname that has first all-capitalized letters, then all-lowercase, while the opposite is true for opponents, their Pokémon are named lowercase, then uppercase. A Bulbasaur used by the player would, then, be named BULBAsaur, while one controlled by the opponent would be named bulbaSAUR.
The Battle Factories featured in Generation III's and Generation IV's Battle Frontiers may be seen as a spiritual successor to the Challenge Cup.
