Bongo is a one eared rabbit created by Matt Groening who appeared in Life in Hell comics. He makes cameos in the show, normally as a toy in background scenes.
- THOH – "Treehouse of Horror XII" Cameo
- Episode – "The Bart Wants What It Wants" (Maggie's toy)
- Episode – "The Man in the Blue Flannel Pants" (Lisa's toy)
- Episode – "Simpson Christmas Stories" (in Maggie's sock over the chimney)
- Episode – "The Fool Monty" (as a toy in Bart's closet)
- Episode – "Simpsorama" (Cameo)
- Episode – "Mathlete's Feat" (Couch gag, seen as a doll in Rick's bag)