Dukey is Johnny's dog and the deuteragonist. One of the most notable things about him is that he has the ability to speak. He's a dog mutated by Susan and Mary. Since then, he became very intelligent and smart. He is also a master at karate, knows somewhat how to speak Chow Now, play video games and gives great advice. When Johnny, Susan, Mary and Dukey are near a human that does not know Dukey and he (Dukey) talks, the other person usually says "Did that dog just talk?". In Hugh's case, if Dukey talks in front of him, he says "Did Dukey just talk?".