Pokémon World Tournament

The Pokémon World Tournament is a battle facility introduced in Pokémon Black 2 and White 2. It is organized by the Sinnoh League Champion Cynthia.

Description
It appears that the trainers that you fight here, are trainers you've met on journies to the other reigons. The list of the triners you fight are:

Kanto

Brock, Lt. Surge, Misty, Erika, Janine, Blaine, Giovanni, Lance, Blue (or Green)

Hoenn

Steven

Sinnoh

Volkner, Cynthia

Unova

Akuroma (info not yet relaesed in this trainer)