John DiMaggio . Other voice-over roles of his include Dr. Drakken and Motor Ed on Kim Possible , Brother Blood on Teen Titans , Rico in The Penguins of Madagascar , Fu Dog and Ogre In American Dragon : Jake Long , Niblet on Pound Puppies , the Scotsman on Samurai Jack , and as the voice of Shnitzel on Chowder .
John DiMaggio had a lead role on Teen Titans.