Here is just some more information coming from the CoroCoro Scans that have bee translated.
New CoroCoro scans have been leaked on Japanese image boards and, as expected, they reveal new information regarding Pok�mon Heart Gold and Soul Silver. Below is a list of some new features and other Pok�mon HG/SS related news highlighted by CoroCoro:
Starter Pok�mon are not the only Pok�mon that will follow you in-game
New playable female character (not from Pok�mon Crystal version)
Player`s Pok�mon gear has been upgraded (possible camera addition)
Notch-eared Pichu confirmed in-game (Pikachu-Colored Pichu interacts with this Pichu in a possible in-game event)
More Wi-Fi features to be added
Sprout Tower and Slowpoke Well remodeled
New Pok�mon Sugimori art revealed
CoroCoro hints at Kanto`s return
Not Confirmed: Skateboard key item in-game (like bike) and September 11th 2009 release date in Japan
Information Source : http://www.projectpokemon.org/
Trainer: NIKO
Pokemon B/W Friend Code:
3783-4062-8709