Prankster Boy is a fifth (later sixth) grade boy and one of the bullies who is friends with Lawson. He sometimes pulls a prank on other kids, particularly TJ and the Gang. His real name is Rocky Lawthorne.

Voice: Steven

Father: Eugene Lawthorne

Mother: Patricia Lawthorne

Friends: Earwin Lawson, Gelman, Conrad Mundy, Greg Skeens, Chucko Kowalski, Jocko, Buster, Cheay, Koreo, Lazy Kid, Sue Bob Murphy and Kurst the Worst 

Enemies: Miss Finster, Principal Prickly, TJ Detweiler, Vince LaSSao, Ashley Spinelli, Gretchen Grundler, Mikey Blumberg, Gus Griswald, Randall Weems and Menlo

Likes: Going to fast food places, football, pulling pranks on any other students particularly TJ and the Gang and causing trouble

Dislikes: Being grounded, being snitched on by Randall and getting punished

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