You may not have duplicate Pokémon or duplicate held items. The item Soul Dew and the move Sky Drop are banned. Legendary or mythical Pokémon may not participate, either. For these battles, all Pokémon will be set to Level 50.
Tournament:
Kanto Leaders Tournament is a tournament in which Gym Leaders from Kanto are participating.
Kanto Leaders Tournament (Japanese: カントーリーダーズトーナメントKanto Leaders Tournament) is a tournament held within the wider Pokémon World Tournament competition. Entry to this tournament is through the right-hand attendant.
"Kanto Leaders Tournament is a tournament in which Gym Leaders from Kanto are participating. You may not have duplicate Pokémon or duplicate held items. The item Soul Dew and the move Sky Drop are banned. Legendary or mythical Pokémon may not participate, either. For these battles, all Pokémon will be set to Level 50. The winner will be rewarded with a little more BP than usual. Good luck!"
The number of Pokémon each participant uses varies depending on the selected battle style.