http://www.serebii.net/index2.shtml

Also

-Release date 11th Sept(Japan)
-Preorders start on July 20th, same date as new movie, speculative preorder movie cross promotion
-From the Johto map, Kanto is hinted at
-Wifi Features Expanded
-Boy/Girl choice
-Skateboard
-Rival shown
-Three Wi-Fi Minigames
-Slowpoke Well and Sprout Tower redesigned
-Not only your starter follows you
-Pokegear redesign, To feature a camera (DSi enhanced?)

                                     

I wonder when the Pikachu coloured Pichu will be given away in NA.

dang it! I just started a post for this. you beat me to it!!!

http://pokebeach.com/2009/05/june-corocoro-scans-with-heartgold-and-soulsilver

Brand new art can be found here.

Pichu can follow you! Please let Togepi be able to...

It seems they got rid of Crystal's female in favor of a new one. Looks alot like May for some reason.

The new female's clothes look like Mario's.

 Wow.. you're right.

Also Larvitar looks pretty badass with the new art.

well somehow i would like to see some new areas - i mean they have whole game already programmed and the only thing they have to change is the graphics and some coding to make it morefresh and Platinum-like. either way i usually play only One Pokemon each generation so i guess i will pass on this one.

lol, I looked back, her hair looks like Mario's Mustache!

@Pikaboo

Stop raping my mind..