New Pokemon Diamond/Pearl info

* 3D models on a 2D plane for overworld gameplay
* Sprite based 2D battles
* New attacks including Meteoric Swarm (Dragon Attack, 140 Base Power, Your own Special Attack dropped 2 points on use)
* Over 100 new Pokemon
* A whole new adventure in the Shino Region
* All your top-trained Pokemon from Pokemon Ruby/Sapphire/Emerald/FireRed/LeafGreen or Colosseum/XD will be transferable into Diamond/Peal using the DS' GBA slot after completing a certain event in the game.
* New Gear System to keep track of stuff like your map
* 'All the DS Features to be used' - Junichi Masuda
* Online play using the WiFi Connection as well as local wireless.
Nsider forums