When Rudy goes on a bike trip with Bobby and Phil, the gang throw a party at the dojo. All is well until they notice Rudy's prized katana sword is missing. Jack, Kim and Milton try to find a new one, while Jerry and Eddie clean up.
Jack declines Kim's invite to a dance, so she takes a new boy at school, who turns out to be a black dragon. Milton and Jerry discover they have hot dates. Rudy and Eddie make cars for a scout competition.
Rudy flips a pro wrestler and goes viral, which makes Jack think it's acceptable to fight people at school, which lands him in detention. Milton worries when he thinks his girlfriend wants to kiss him.
Bobby unveils a new robot sensei, which greatly improves the gang's performances. Rudy is fired, but when the robot starts pushing them too hard, they try to get Rudy back. Milton and Eddie create their own robot.