Dudley Puppy is the titular character and the primary protagonist of T.U.F.F. Puppy and a member of Team Sonic. Although he is still just a pup, Dudley's got the heart of a pack of full-grown dogs. He has no fear and he has no pants. Reared on his mother's strict morals, he was born to stop all badness and meanness in its tracks! Now if only he could figure out how to follow that last rule…
Though chasing bones may excite him more than chasing bad guys, Dudley gives all he's got to keeping the streets of Petropolis crime-free. But that doesn't mean things always go smoothly. Dudley's a loose cannon and has a way of messing things up before he fixes them. That's why the Chief paired him up with his "purr-fect" partner, Kitty Katswell. Together, they're bringing D.O.O.M. down, one thug at a time.
He and Kitty met Sonic and the gang in Sonic's Final Destination 5 and joins the team after the events of Sonic Unleashed (Cameron Version).