Pokemon X and Pokemon Y - Shiny Gengar Trailer - IGN

GameStop will offer special code cards this month to get a Shiny Gengar, who arrives holding a Gengarite.

Shiny Mega Gengar Haunting Up North American GameStops Until 26th October

Pokemon X and Pokemon Y - Shiny Gengar Trailer - IGN

Gengar - Pokemon X and Y Guide - IGN

Mega Pokémanz

Pokemon Y [Trailers] - IGN

Pokemon X, Pokemon Y - Pyroar Reveal Trailer - IGN

GameStop - Pokemon Masters: Head to your local GameStop to pick up a Shiny Gengar code card for Pokemon X & Y and pre-order Pokemon Alpha Sapphire and Omega Ruby!

Pokemon X and Pokemon Y - Shiny Gengar Trailer - IGN

Shiny Gengar For Pokémon X And Y Coming To GameStop - Siliconera

Event Pokemon - Pokemon X and Y Guide - IGN