Crayon Boy (voiced by Richard Steven Horvitz) is a one-shot villain that appears in Alvin and the Chipmunks 3: Utah Chainsaw Massacre.
In the early summer of 2007, Crayon Boy, along with Elmer Fudd (Billy West) and Charm Caster (Kari Wahlgren), travels to Monterrey Park and stops in an convenience store. In the store, Crayon Boy takes to hassling customer named Hoagie Gilligan (Benjamin Diskin), having both Elmer and Charm Caster restrain Hoagie's Japanese American friend named Kuki Sanban (Lauren Tom). Having grabbed Kuki's wallet when she attempted to throw it to Hoagie, Crayon Boy taunts Hoagie, making Hoagie grudgingly ask for it back and address him as Clarence.
After Kuki Sanban mangles their motorcycles as a revenge for harassing/troubling her and Hoagie, Crayon Boy and his fellow bikers follow the two kids back to the suburbs of Riverside. Despite being reluctant to participate his friends'plan to burn down the haunted house, Crayon Boy, after being reassured by Elmer that nobody will get hurt/injured, wanders off to look around. Going into the haunted house, Crayon Boy nonchalantly begins toying with some of the equipment lying around on the second, eventually climbing up onto the third floor, which leads to the attic. Finding a rope and rake used to hoist dry leaves, Crayon Boy begins swinging from it for fun, catching the attention of, and annoys Charm Caster, who demands Crayon Boy to come down this instant, so they can help Elmer in his revenge plans. Unseen by Charm Caster, Crayon Boy was ultimately grabbed by Donald Walls (posing as Theodore Seville) and pulled back into the haunted house, where Theodore/Donald stabs him to an attic rafter by the throat with a sharp pitchfork. Shortly, before Theodore/Donald kills her too, Charm Caster finds Crayon Boy's corpse, which Theodore/Donald moves. Crayon Boy's corpse was later found and eventually taken away by the paramedics.