Booper

Booper is an alien pet from the cartoon portion of the Generation 1 continuity family.

It's a mouse/elephant/Richard Nixon fuzor!

Booper is an alien creature vaguely resembling a cross between an elephant and a mouse. Booper is of a species native to the planet Brobdingnag and belongs to Aron, a young, timid boy. As everything on the planet is much larger than usual, Booper is closer to the size of a small elephant than a mouse.

Fiction

The Transformers cartoon

After catching Ravage, Aron stuck the Decepticon into Booper's cage as a playmate. Though they initially didn't get along, they were soon merrily using Booper's hamster wheel together. When Aron's parents found one of his toys smoking, they demanded to know what was going on, and Aron removed Ravage from the cage to show them. Child's Play