I have a classmate who is studying business at the University of Western Australia, but wants to transfer to Melbourne University next semester. Is it okay? What is the general process?

Yes, the process is the same as applying for a school. Find an application form for international students in MouUniversity, fill it out and choose to transfer credits. It's high reputation. After scanning, scan it with the acdamic report card of the University of Western Australia, and then send it to wait for the news. The University of Mexico does not stipulate how many average points Western Australia needs to transfer, so you can apply first.