Pokémon League is a center where all Pokémon trainers come to battle the leaders of all Trainers. To enter, one must collect eight badges, one from each Gym in the region they're currently in. Also they're only allowed to use six Pokémon at a time, both in the games and the anime. However, unlike in the games where a Trainer only battles the Elite Four, in the anime Trainers participate in a tournament where they battle one another.
The Sinnoh Pokémon League is located at the north of Sunyshore City, where players have to cross the water route and enter the Sinnoh Victory Road to reach there. This marks the first time the Champion has been female.
In Black and White Versions 2, the Pokémon League is situated eastwards of Humilau City; to arrive, the player must cross a land route briefly interrupted by the Giant Chasm and pass the Victory Road.
This marks the first time where the Elite Four (apart from the Champion) can be battled in any order, the Champion still cannot be battled until after Shauntal, Grimsley, Caitlin and Marshal have been battled. The Champion in Black 2 and White 2, Iris, is the youngest Champion at around age 12.
The Kalos Pokémon League region is located directly northwest of Snowbelle City. The player must go to Route 21 or Route 22 in order to reach the Victory Road. The player must defeat all members of the Elite Four; Malva, Siebold, Wikstrom, and Drasna in order to defeat the champion of Kalos, Diantha.