NIFFLER
Featured on Episode 10
Does his Niffler friend have a name? – Michael
Pastries. – Ariel
FACT FILE
Mentioned in Fantastic Beasts: M.O.M. Classification XXX
Reported Locations: Britain
Known Abilities: Proclivity for finding sparkly treasures, mischief
APPEARANCE
Nifflers are fluffy, black, long-snouted little rascals.They are gentle and affectionate, but incredibly mischievous when it comes to treasure.
SIGHTINGS
One memorable sighting of a Niffler occurred in 1996 at Hogwarts School of Witchcraft and Wizardry.
Somebody managed to slip a hairy-snouted Niffler into Umbridge’s office, which promptly tore the place apart in its search for shiny objects, leapt on Umbridge when she entered and tried to gnaw the rings off her stubby fingers.
Source: Harry Potter and the Order of the Phoenix
ACCORDING TO NEWT SCAMANDER
Everyone loves Nifflers, but unfortunately, they are not suited for housepets.
Though the Niffler is gentle and even affectionate, it can be destructive to belongings and should never be kept in a house.
Source: Fantastic Beasts and Where to Find Them, book

Pasties the Niffler