“VGC Rule Set: (From December 1st 2016)

Usable Games Pokémon Sun, Pokémon Moon
Battle Type: Double Battle
Pokémon Restrictions: Alola Pokédex.
Banned Pokémon: Cosmog, Cosmoem, Solgaleo, Lunala, Necrozma, Magearna, Ash-Greninja, Pokémon not captured or hatched in Sun & Moon
Banned Items: Mega Stones
Clauses: No same Pokémon, No same item
Players may only use Pokémon with items or moves obtained in Pokémon Sun & Moon”