Sir Jesse of Worstershiringhamptonsruckschtershire or simply Knight Jesse is a replacement bully for Jesse. He appeared in the episode Dodge This.
Biography
After being beaten by Jesse in dodgeball enough, Luc and Theo predict his every move and win, brutally humiliating Jesse. Jesse becomes depressed and gives up being a bully. When the bully community hears about this, they send in one of their people to transfer to his school. This would be Knight Jesse. Knight Jesse punished Luc and Theo by jousting with them.