Usually in online Pokémon matches you're limited to using regular ol' pocket monsters time and time again. For the Generation Showdown, however, you'll be allowed to have up to two legendary or mythical Pokémon on your team.

You can finally wreck opponents with a Primal Groudon or Kyogre, or use the Mega Mewtwo of your preference; Pokémon that were not allowed to enter previous competitions. But there are still some Pokémon that are ineligible, check out all the rules and guidelines for more details.

Registrations for the Generation Showdown begins on February 5. Only Alpha Sapphire and Omega Ruby copies of the games are to be used. So start trading things from X and Y before you run out of time.