Grayden Bundy is a boy who appears in Double Down. He plays the tuba in the school band.
In Mrs. Graziano's music class, when Greg Heffley blapped playing the French Horn, Jake McGough started trying to sniff out who did it. However, when he got closer to Greg, he pinned it on Grayden. Greg says that he doesn't feel bad for getting Grayden in trouble because Grayden is known to let it rip in class.