Last month we reported on a brand new event making its way to the US and UK. This event is being held by GameStop stores in the US (EB Games in Canada), and GAME stores in the UK.
Pokémon X and Pokémon Y owners will be able to get their hands on a Shiny Gengar holding the Gengarite Mega Stone. The event is live in the US and Canada now until the 26th of October. In the UK you'll be able to get hold of Gengar from tomorrow, the 15th of October until the 5th of November.
After the Gengar event we'll be given a new event allowing us to get our hands on Diancie.