Young wombats can be very cute, mischievous but untrainable. They are almost manageable as pets until they start to get big. They are incredibly strong too and love to butt at things with their head. Cars take their toll on them though, with often enough the car coming off very badly as they go under the car and can cause great damage if hit at speed. As tough as they are, they don't have much of a chance if hit by a car at speed.
One species at least is also suffering a terrible mange disease that if untreated, will eventually kill each wombat. The mange is spread by mites.
Wombats are marsupials and build large underground burrows for shelter and breeding. The pouch for their young faces backwards so as to not fill will soil when they are digging. They are disliked by farmers as not only do they eat grass, livestock can break legs when a burrow collapses under their weight and it can be dangerous to a farmer if a farm vehicle lands a wheel in a burrow entrance.
To dig such burrows and they have very strong and powerful claws, as you can see in this rather cute video. Length: 2.16