From 13 to 26 October, players who visit a GameStop in the United States will receive a codes for a Shiny Gengar holding a Gengarite Mega Stone. From 27 October to 16 November, GameStop will offer Diancie, the previously unobtainable Mythical Pokémon. Players who choose to import Diancie into Pokémon Omega Ruby or Alpha Sapphire will gain a Diancite Mega Stone for Mega Evolution hijinks. Both giveaways are valid for players of 2013’s Pokémon X and Pokémon Y
Pokémon Omega Ruby and Alpha Sapphire launch for Nintendo 3DS on 21 November 2014.