The Official Japanese Pokémon Website has announced a new Wi-Fi event that loosely ties in with the new series: Pocket Monsters Best Wishes! In Best Wishes episode 12, which airs on Thursday, December 9th, 2010, Satoshi will receive an egg.

A special Pokémon Mystery Egg event for Pokémon Black and White will start of December 17th, 2010 and will end on January 11th, 2011. Players can only receive one egg per game and the egg will hatch into one of three random Pokémon. The event will be available via Nintendo Wi-Fi Connection, at Nintendo Zone locations (such as participating McDonalds), and DS Station locations in Japan.


Source: http://www.pokemon.co.jp/info/2010/11/g101105_01.html?a001=news