Cavity Creep is a pickaxe-wielding monster[1].
It used to work for a toothpaste commercial, but was then hired by the Neebler Elves as a security guard. Specifically, it was intended to prevent intrusions by Bun-bun, who has a habit of breaking in to squeeze Grahammy for information a tendency to run a few other workers through the cookie-press for intimidation purposes. When it confronts Bun-bun, however, Bun-bun kills it by driving a tube of toothpaste through its eye-socket and into its brain.