Bulldog is the name for a breed of dog commonly referred to as the English Bulldog. Other Bulldog breeds include the American Bulldog, Olde English Bulldogge, and the French Bulldog. The Bulldog is a muscular, heavy dog with a wrinkled face and a distinctive pushed-in nose. The American Kennel Club (AKC), The Kennel Club (UK), and the United Kennel Club (UKC) oversee breeding standards. In Rio and Rio 2, Luiz is a Bulldog.