The official Poémon Diamond and Pearl website, has had a recent update with several new screenshots and videos. So, we now have a new Pokemon that is most likely and evolution of Electabuzz, three new attacks: Shadow Claw (Weavile), In-Fight (Lucario) and Discharge (Pachirisu).
Buizeru knows Swift
For more you can check: the official website, Bulbanews and Serebii