Well, she'd probably terrify most of the students at Hogwarts. Wednesday has her own unique and rather dark style. She might not be too impressed with the magical world's rules and hierarchies. Maybe she'd befriend thestrals since they are associated with death, which she has an odd fascination with.
If Wednesday Addams were to go to Hogwarts in fanfiction, she would bring a whole new level of chaos. She's used to her own macabre world, and Hogwarts with its magic and secrets would be a new playground for her. She could end up in Slytherin, given her cunning nature. And she might start her own little club of the 'odd' students, those who are interested in the darker aspects of magic.
She might fit in as an outcast at first. Her gloomy appearance and attitude would set her apart. But she could gradually find her niche. Maybe she'd excel in Defense Against the Dark Arts, as she has her own experience with the darker side of life.
Well, in this fanfiction, Aang might bring his airbending skills to Hogwarts. He could use his bending to create interesting effects during Quidditch matches, like using air currents to speed up the broomsticks. He may also interact with the Hogwarts students in unique ways, perhaps teaching them a bit about his culture from the Avatar world.
Well, he might show off some really old - fashioned but extremely powerful magic that would shock everyone at Hogwarts. Maybe he'd befriend Harry Potter and teach him some ancient spells that could defeat Voldemort in a whole new way.
In this fanfiction, Dudley might face a lot of challenges. He's used to a different world than Hogwarts. He could struggle with magic classes as he has no prior knowledge. Maybe he'd be bullied at first for being a Muggle - born in the eyes of some students. Also, his relationship with Harry could change in a new and interesting way.
One great Wednesday Addams fanfiction is 'The New Addams Adventure'. It takes Wednesday on a journey outside of her usual spooky world and into a modern city. It's really interesting to see how she reacts to normal, everyday things with her unique, dark perspective.
Well, perhaps in 'harry goes to hogwarts later fanfiction', he could form new friendships. He might meet students from different backgrounds or even different magical cultures, which would bring a whole new dynamic to his Hogwarts experience. He could also discover new magical abilities or spells that were previously unknown to him, which would help him in his adventures at Hogwarts.
If Fairy Tail goes to Hogwarts in fanfiction, it would be an interesting clash of cultures. The Fairy Tail guild is very rowdy and family - like. At Hogwarts, there are strict rules. The Fairy Tail members might get into trouble for their unruly behavior. For example, Gray might accidentally freeze part of the Great Hall during a fight with Natsu. And the Hogwarts students would be both shocked and intrigued by the Fairy Tail mages' powerful and flashy magic.
If Fem Naruto goes to Hogwarts in fanfiction, it could be really interesting. She'd likely have a hard time adjusting at first. The whole concept of magic wands and spells would be new to her. However, her determination would help her catch up quickly. I can imagine her getting into some trouble because of her impulsive nature, but also using her ninja stealth to get out of tight situations. And she'd definitely bring a new dynamic to Quidditch with her athletic abilities.
Well, he might introduce some unique ninja skills to Hogwarts. Maybe he'd show the students how to move stealthily like in the ANBU, which could be a new concept for them. And his combat skills could be a shock to the wizards used to magic duels.
If godlike Naruto goes to Hogwarts in fanfiction, it would be a total chaos in a good way. Naruto is known for his determination and ability to make friends. He would quickly befriend many students. His chakra and ninjutsu would be a new and strange concept to the wizards. He could even use his Shadow Clone Jutsu to attend multiple classes at once, which would amaze the professors. Also, his experience in battles would make him a great asset in protecting Hogwarts from any potential threats.