Fuzzball

A Furry Creature is an unnamed purple animal found in the Secret Mine in Luigi's Mansion Dark Moon. Found only in the Chalet, these animals are unusual in that they're not enemies in any sense, they do no damage to Luigi on contact or via attacks.

Instead, they chase Luigi around and get in the way of the Poltergust 5000. If Luigi picks one up using it, he can shoot it around the room and stun the animal for a short time.

There are also Gold variations that drop gold bars and notes when thrown. These turn into Purple versions after being thrown around three times.

Trivia

 * They look similar in appearance to Toothberries.