The days of January 30 through February 14, and special Pokémon Diamond Pearl and Platinum event will occur on Game Stop, The special shiny Pikachu-colored Pichu can be download. Later the pichu can be transfer to HeartGold or SoulSilver version and unlock an in-game event to get the notch-eared Pichu.
And if your pre-order a copy of Pokémon HeartGold or SoulSilver you get a Ho-oh/Lugia figure depends of which you pre-order.
I've got the Japanese version of HeartGold, and it is the best Pocket Monsters game I have ever played. I'm looking forward to VGC 2010. I hope Europe and the U.S. goes by the 2009 rules though...>_<