As reported back in July, GameStop and EB are collaborating with The Pokémon Company to give away a trio of shiny legendary Pokémon for Pokémon Black/White and Black 2/White 2 in Dialga, Palkia and Giratina.
While Dialga and Palkia giveaways have already concluded, Giratina is available until October 20th in the U.S. and Canada. More details on the giveaway are available here.
Giratina is a Ghost/Dragon-type Pokémon and will come with the moves Shadow Force, Aura Sphere, Dragon Pulse and Dragon Claw. The giveaway is being held in celebration of Pokémon X and Pokémon Y’s release. Both games will be available on October 12th.