Pokemon Black/White has great graphics, takes place in a new region, has over 150 new Pokemon, a good plot,and all the Wi-Fi access you could want! What more is there to ask? Well, a series reboot, for one thing. The whole game looks great. There is also Looker, a member of the international police, that returns from platinum. (During red/blue/ yellow/leaf green/fire red someone says that they are a member the international police, hmm, could that be Looker?) you are able to transfer, catch, and battle 4th generation Pokemon when you beat the game, though.
Here is a video sample: