With the Shaymin event just recently announced, we now have news of a Regigigas Event March 8th Through March 21st at Toys'R'Us
Here are the Specs on this Regigigas:
Ball: Cherish Ball
Level: 100!
Held Item: Custap Berry (New Berry! 1st Release)
Moves: Iron Head, Rock Slide, Icy Wind, Crush Grip
In addition to the fact that this pokemon is Level 100, it will also unlock an event in Pokemon Platinum (March 22nd 2009) so that you can catch Regirock, Registeel, and Regice in Pokemon Platinum!
~ultimatedra~