Dudley Puppy is a white dog with a black t-shirt who's the heart of T.U.F.F. HQ. 

T.U.F.F. Puppy is an American animated action television series created by Butch Hartman. It's on October 2, 2010, along with Planet Sheen, which premiered a half hour earlier. T.U.F.F. Puppy is Hartman's third animated show for Nickelodeon, after The Fairly OddParents and Danny Phantom and also before Bunsen Is a Beast. The show was cancelled after 3 seasons and aired its final episode on April 4, 2015. As of Jan