Reggie is the secondary antagonist of Lady and the Tramp II:Scamp's Adventure.
Reggie is extremly ruthless and violent trying to kill anyone foolish enough to enter his territory. He is also very brutal but is dim witted and slow which leads to his downfall.
Lady and the Tramp II:Scamp's Adenture
He is first seen when Buster gives Scamp a "test" to prove himself. The test involves going into Reggie's alley and pinching his can. Scamp nearly succeeds but accidentally wakes Reggie up and chases him but he is taken to the pound.
In the pound Scamp shares the same cell with Reggie who tries to get revenge but fails due to his slowness and Tramp's speed. Tramp escapes and Reggie runs into the bars and gets knocked unconscious