Gamers with a copy of Pokémon Black, Pokémon White, Pokémon Black 2, or Pokémon White 2 can visit GameStop starting March 4, 2013 to grab Meloetta. Of course, you’ll also need a Nintendo DS/3DS system to take advantage of this event. Meloetta will only be available for a limited time; more information is scheduled to appear before February meets its end.
Meloetta is a Pyschic type Pokémon that has the Serene Grace ability. Serene Grace doubles the chance of a move having an additional effect.