Billy is a background character that appears in Boss Mabel.
He appears among the tourists at the Mystery Shack in "Boss Mabel." While he plays with a box in the gift shop, until Wendy's friends accidentally hit him in the face with a shrunken head they were kicking around, giving him a black eye and causing him to cry. An unnamed woman, presumably his mother, soon arrives, angrily seeks a refund upon seeing Billy's injury, and leaves with the boy.
Little is known about his personality, though he seems to be curious and enjoys visiting the Shack. In the event of injury, he cries.
He is short with tan skin and short, brown hair. He wears a blue t-shirt, dark yellow-green shorts, and light brown shoes.
- 113. "Boss Mabel"