VGC Rule Set: (From January 1st 2016)

Usable Games Pokémon Omega Ruby, Pokémon Alpha Sapphire
Battle Type: Double Battle
Pokémon Restrictions: National Pokédex.
Pokémon Limits: Teams may have no more than two of the following Pokémon: Mewtwo, Lugia, Ho-Oh, Kyogre, Groudon, Rayquaza, Dialga, Palkia, Giratina, Reshiram, Zekrom, Kyurem, Xerneas, Yveltal, and Zygarde.
Banned Pokémon: Mew, Celebi, Jirachi, Deoxys, Phione, Manaphy, Darkrai, Shaymin, Arceus, Victini, Keldeo, Meloetta, Genesect, Diancie, and Hoopa, Pokémon not captured or hatched in X, Y, Omega Ruby & Alpha Sapphire
Banned Items: Soul Dew
Clauses: No same Pokémon, No same item
Players may only use Pokémon with items or moves obtained in Pokémon X, Y, Omega Ruby or Alpha Sapphire