Moony, Wormtail, Padfoot, and Prongs are the nicknames of the four friends who together created the Marauders' Map. Moony is Remus Lupin, the name owing to his being a Werewolf. Wormtail is a reference to Peter Pettigrew's Animagus form of a rat. Padfoot is a reference to Sirius' dog form, and Prongs is the name for James Potter's Stag form.