Sensei Rudy (played by Jason Earles) is a over-the-top owner and Sensai of the Bobbi Wasabi Martial Arts Academy. He encourages his students and tells them that karate isn't about fights at school but about self discipline. In "Fat Chance", we learn that Lonnie of Reptile World is his frienemy. In the episode Ricky Weaver we find out that he was in the boy band "Just Us Guyz" The z making it cool. It was popular entertainment among his family members. He then joins the dojos newest boy band "The Black Belt Boys" consiting of him, Jerry, Milton and, Eddie.