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.

Pokemon X [Trailers] - IGN

Pokemon X and Pokemon Y - Shiny Gengar Trailer - IGN

Pokemon Y [Trailers] - IGN

Pokemon X Version, Pokemon Y Version Battle Trailer - IGN

Gengar - Pokemon X and Y Guide - IGN

Shiny event Gengar w/sludge wave and Marshadow giveway. : r/PokeMoonSun

You get to choose a non-starter pokemon at the beginning of the game, Page 2

Pokemon X Y - Shiny Gengar - Nintendo 3DS / 2DS

CoroCoro Poke-Navi

Pokemon Y [Trailers] - IGN

Hosting Square Shiny GMax Gengar! : r/Shinyraids

The New 151 (Pokémon redesigns)

Pokemon Magnetricity