History
Mooster Fantastic was one of the numerous threats the Ultipets confronted. At one point, he joined forces with Hulk-Bunny, Quacksilver and Kangaroo the Conqueror, and tried to take over the world.
If he was alive at the time, Mooster Fantastic most likely died when the universe came to an end as a consequence of its decay and eventual destuction, caused by rifts in the space-time continuum.[1]