Watch Free Online HD Moviesjoy. Young Johnny is gung-ho and full of courage. Johnny's brainiac twin sisters, Susan and Mary, use Johnny as their guinea pig for their outrageous scientific experiments. If they can dream it up, Johnny will do it; as long as his genetically engineered super dog, Dukey, can come along.This limited series was originally produced as a digital continuation of the original animated show, before being shelved entirely after only uploading one episode.