@ValleyFiah- Dingoes are not marsupials. They were introduced from what is now Thailand a few thousand years ago. They are a type of wild dog that is very similar to the Asian gray wolf. Dingoes reproduce normally, and do not carry their young in a pouch.
Dingoes are currently classified as native to Australia since they were introduced thousands of years ago. They have adapted to the Australian Environment and the local ecosystem has adapted to their presence.
When it comes to talking about endemic species though, they are considered alien species. They have not been around long enough, or in large enough numbers to have an impact on the evolution of other species. To the best of my knowledge, the number of species on the list of Australia's extinct animals attributed to the dingo is only two or three.