The creatures in the cartoon seem to have furry tails. If they do, they are possums.

"Possessing a furry tail, the true possum belongs to the Phalangeridae family within the Marsupialia order and is primarily found in New Guinea, Australia, Indonesia and other islands in the Pacific region. With their signature bare tail, the opossum is North America’s only known marsupial"
Possum and opossum, is one correct? The answer may surprise | The Hot Word | Hot & Trending Words Daily Blog at Dictionary.com