Monocerous

A vicious bull-like monster who loves to eat JubJubs.

Although it's origin has been known since the beginning of Neopets, It's actually debatable if this monster is even considered part of Neopets anymore, as it has been taken out of the Gallery of Evil, along with all related items.

Random Event goes...

The Monocerous roars 'Once I ate 16 Jub Jubs in a week!'