Mr. Peppy is a Bone Vampire, who was Fry's pet for a brief period in 3011. Fry discovered Mr. Peppy as a fertile egg at the Local Group Farmer's Market, which he decided to nurse until it hatched. When Mr. Peppy eventually hatched, the Planet Express crew discovered that it was a bone vampire, an alien known to suck out the bones of creatures, leaving the flesh behind. As it was clear that Mr. Peppy was dangerous, and could reproduce asexually, the crew decided it would be best to release the creature back into the wild.
On Mr. Peppy's species' planet of origin, the crew discover that the bone vampires have been hunted to extinction by the local farmers whose livestock they have almost wiped out. After an unsuccessful attempt to kill Mr. Peppy, the locals realize that due to their current overpopulation of livestock, Mr. Peppy might instead be useful to them and is thus spared.
- Although Fry names the Bone Vampire he adopts "Mr. Peppy," and the creature is referred to as a male, Fry's pet is probably a girl--in fact, the Bone Vampire-species as a whole is probably all-girls, given how the Professor said that the species reproduces asexually (essentially cloning themselves), much like certain species of lizard.