Dirty Bill is a bulldog featured in the film The Robber Kitten. He is a great bandit. While he is looked for, he falls on Ambrose whom he takes for a real bandit. Ambrose tells him a false story where he extorts money. Dirty Bill extorts his bag money (in fact, cookies); Ambrose avoids him. The fate of Dirty Bill remains uncertain. He is voiced by Billy Bletcher.
- In Walt Disney's Comics and Stories' issues 17 and 582, Dirty Bill is more generous and when He gets captured by the law, He told Ambrose to return home with the stolen money, and said that He doesn't want Ambrose to end up like those who break the law.