| Please note the following:
|"YOU'RE PATHETIC!!! GO TO YOUR ROOM!!! YOUR GROUNDED!!!"|
— Banzai told Bully Bill off for saying He didn't steal Jeffy's Bike. -Jeffy's Bike!
Banzai Bill is the secondary antagonist in Bowser Junior Learns Karate! He was called to beat up Bowser when he was about to tell Bully Bill about Junior's Golden Thomas. Then, the Brooklyn Guy came with an officer outfit, but Banzai and Bully Bill beat him up. He also appears in Jeffy's Bike! in which he tells Bully Bill off.
- He is considered to be very strong since he beat up Bowser, who is also one of the strongest characters in SuperMarioLogan.