If Harry Potter goes to Hotel Transylvania in fanfiction, he could find himself in a series of comical and adventurous situations. He may accidentally use a spell that turns one of the monsters into something unexpected. He'd be intrigued by the hotel's unique architecture and the way it's hidden from the human world. He would also be faced with the challenge of adapting to the different rules of this new place. For instance, the way magic is used or not used in Hotel Transylvania might be different from what he's used to at Hogwarts.
Well, he might be really confused at first. The magical world he knows from Hogwarts is quite different from the spooky yet fun world of Hotel Transylvania. Maybe he'd try to use his magic wand to do normal things like open doors, but the doors in the hotel work in their own strange ways. He could also meet all the unique monsters and have to learn their customs and cultures, which would be a whole new experience for him.
In the fanfiction, Harry Potter could become friends with some of the characters in Hotel Transylvania. For example, he might bond with Dracula over their shared experience of leading a group of magical beings. He could also introduce some of his Hogwarts magic to the monsters, like showing them how to play Quidditch. But he would also have to deal with the fact that he's in a very different kind of magical place, and some of his usual spells might not work as expected.
It could be really interesting. Picture Drac from Hotel Transylvania sending his daughter Mavis to Hogwarts. The magical creatures in the Harry Potter world could interact with the spooky but friendly monsters from Hotel Transylvania. For example, Hagrid might befriend Frankenstein's monster. And the spells in Harry Potter could be used in the Hotel Transylvania setting, like using Lumos to light up the dark corridors of the hotel.
He might meet Mavis first. Since she's often quite curious and adventurous, she could be the one to come across Harry when he arrives at the hotel. She would probably be very interested in this new visitor who has a different kind of magic than what she's used to.
Another fanfiction could involve a spell gone wrong in the Harry Potter universe that transports some of the Hogwarts students to Hotel Transylvania. The students then have to adapt to this new and strange place, and they could teach the vampires and other creatures about magic from their world, while also learning about the unique abilities of the hotel's inhabitants. For example, the werewolves in Hotel Transylvania could compare their transformation experiences with those of the werewolves in the Harry Potter world.
Well, she could start having strange cravings. Maybe she'd crave human food that Johnny likes, which would be really odd for a vampire. This could lead to some funny scenes where she tries to get the kitchen staff to make these strange combinations.
Maybe there's a misunderstanding between Dennis and Winnie. Winnie thinks Dennis is too focused on his human side, and Dennis thinks Winnie is too stuck in the old vampire ways. But then a new threat comes to the hotel, like a group of hunters. They have to work together to protect the hotel and its inhabitants. In the process, they understand each other better and their relationship deepens.
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.
Well, in this kind of fanfic, there could be a lot of comical situations. For example, the werewolves in the hotel might offer to be guards for Mavis, but they end up being a bit too overzealous and accidentally causing small disasters. And Mavis could start to develop new powers during her pregnancy that she has to learn to control.
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.