Wombats are short creatures that live in Australia. One fact about them is that they poop cubes. According to science.org, the reason they do this is because "The intestinal sections contract over several days, squeezing the poop as the gut pulls nutrients and water out of the feces..." They also use their butts as a way to crush predator's skulls.

Probably the most popular animal in Australia, the kangaroo is a large marsupial that's usually around 3 to 8 feet tall. Kangaroo's are good fighters, in the article The World's Most Powerful Animals Ranked, it shows a graph that the red kangaroo has 759 lbs. of punch/kick force, a human having thrice as much punch/kick force.

Tasmanian Devils are the largest carnivorous marsupials in Australia. Their mouths can open up to 80 degrees with enough bite force to crush bone and break through metal.