The Carnival Cartoons figures are appealing in part because of their humorous back story which links each character to one another. Here's the official tale of Pierce and Nathan:
"Pierce and Dogboy are the Carney family mischief makers! Pierce is the quintessential bratty younger brother, and Dogboy is Pierce's pal, a loving pet, and... a fur covered wingman! Pierce relishes his gross-out gig as "The Human Pincushion" in the family sideshow act. (He's got more holes than a boardwalk put-put course). When Dogboy isn't doing double duty as the family's household hound, and Pierce's partner in crime, he wows the crowds at Barker's sideshow with his furry face and outrageous animal antics!"