Pictures from the August 2012 Corocoro have revealed
Genesect (ゲノセクト), the Paleozoic Pokémon. Genesect has been known since information from the rom was extracted from Pokémon Black and White but this is finally the official reveal of this Pokémon. Genesect is National Dex #649 and Isshu Dex 2 #300.
Genesect will be distributed in Japan on the Nintendo Wi-Fi Connection and Nintendo Zones for players of Pokémon Black 2 and White 2 from
August 11th, 2012 until September 14th, 2012.
Source:
https://twitter.com/papico028