the difference is that pokemon platinum uses giratina as the main legendry pokemon, and that there are great 3- graphics, and there are new forms.
jus go to http://serebii.net for more info.
hey chaossslasher im going to be more active in pokecommunity now. and im making you co owner of my megaman fanclub so you could start topics and anything you want because you are my most active member in my club