August 13th to September 17th, you can download a Heracross or a Pinsir (depending on which game you are playing) from Gamestop. Heracross is for Pokemon X's owners, and Pinsir is for Pokemon Y's owners. Also at Gamestop starting August 18th and ending August 31st, you can download Heracronite for Pokemon X's owners and Pinsirite for Pokemon Y's owners. Heracross comes at Level 50 with the moves Bullet Seed, Pin Missile, Close Combat, and Megahorn. Pinsir also comes at Level 50 with the moves X-Scissor, Earthquake, Stone Edge, and Return. Their abilities are random.

Source: Serebii

Yeah, I figured they'd be doing one of these GameStop events before OR/AS was launched. Probably means they'll be announcing pre-orders too if they haven't already, right?

Also, I wonder if this means they'll be doing similar events for other version exclusive Megas sooner or later.

The US really needs a charizard event