Pokemon Platinum is probably the best pokemon game of the lot. Not only does it feature all of the newest pokemon (including Shaymin), but it features all the old ones too. You can play as Dawn or Lucas and, like in Diamond and Pearl, Barry is your rival.

I like the game because it is fun, cool, and easy to play. It works especially well with Action replay, but if you don't have that the game still works fine. The only thing I don't like is near the end of the game were you have to catch Girintia, I hate going through the dimension because it is quite hard and takes ages. Other then that though, this game is great!!