Well, he might encounter unique magical creatures native to Australia. Maybe he'd come across the bunyip, a fearsome water - dwelling creature. He could also explore the Australian wizarding community, which might have different traditions compared to the UK's. For example, their use of magic in relation to the unique Australian flora and fauna could be really interesting.
Perhaps he goes to Australia to hide from the wizarding world in the UK. He wants to start anew and find peace. In Australia, he might make new friends who help him discover a different side of himself. He could learn about the laid - back Australian wizarding culture and how they handle magic in a more relaxed way compared to the formalities in the UK.
He could be on a quest to find a hidden magical artifact in Australia. In fanfiction, there are all sorts of creative ideas. It could be that the artifact is related to an ancient Aboriginal magic that he needs to understand to defeat a new dark wizard threat. So, his journey to Australia is full of mystery and danger.
Perhaps in this fanfiction, Percy goes to Australia to find a hidden artifact that is crucial for the safety of the demigod world. Along the way, he teams up with local demigods (if there are any in the fan - created story). He would have to adapt to the Australian culture and environment, which is very different from what he's used to in the US. He might also face some new types of monsters that are native to Australia.
In such a fanfiction, they might face new magical creatures unique to Australia. For example, the Drop - bear, which could be a fun and dangerous encounter for the Potter family. They may also have to adapt to a different magical community with its own set of rules and traditions.
Well, Harry could be really confused at first. Ouran is a very different world from Hogwarts. He might be shocked by the opulence of Ouran Academy and the strange club system there. Maybe he'd try to find a way to fit in while still being true to his wizard self.
Maybe Harry has some strange magical illness that normal wizards can't cure. So he has to seek help from a very special doctor who might have some unique remedies.
Perhaps he would be seen as an oddity at Alfea. After all, he comes from a completely different magical system. But his reputation as the 'Boy Who Lived' might precede him. Some might be in awe of him, while others might be skeptical. His presence could also stir up some rivalries among the students at Alfea who are used to their own hierarchies. Harry would have to find his place among the fairies and deal with any potential jealousies or hostilities.
Well, he might encounter new magical creatures unique to America, like the Thunderbird. He could also visit American wizarding schools and be amazed by their different teaching methods compared to Hogwarts.
In this fanfiction, Harry could attend a Canadian wizarding school. He'd have to adapt to a different teaching style and make new friends. The curriculum might include courses on Canadian magical history and spells that are specific to the region. He might also face some challenges from local wizards who are not used to having a famous wizard like him around.
Well, in this fanfiction, Harry Potter might face new magical challenges in the ICW (International Confederation of Wizards). He could encounter different magical cultures and spells from around the world. Maybe he'll make new friends or enemies among international wizards.
Well, he might visit Beauxbatons Academy. Maybe he would meet some new friends there, like some interesting French wizards or witches. He could also explore the French wizarding culture, which is likely different from what he's used to in England.
His Gryffindor courage would still be put to the test. There could be difficult exams and challenges at college. He might also get involved in some sort of college - wide magical competition. And he would have to balance his social life, his studies, and any potential threats from the dark magic side that still exists.