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.
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.
She might face a lot of challenges. For example, she'd have to adapt to the magical world of Hogwarts which is very different from her original world. The classes like Potions and Transfiguration would be new to her. And she might make new friends or enemies among the Hogwarts students.
Well, he might use his ghost powers to play some really interesting pranks at Hogwarts. Maybe he could turn invisible and sneak into the restricted section of the library without getting caught by Filch or Mrs. Norris. He could also use his flight ability to play a wild game of Quidditch, flying rings around the players on broomsticks.
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.
If Percy Jackson goes to protect Hogwarts in fanfiction, it'd be an amazing crossover. Percy is used to facing all kinds of monsters, and at Hogwarts, he'd have to adapt to magic. He might form an alliance with some of the Hogwarts students. His speed and combat skills could help in protecting the school from any invaders, whether they be Death Eaters or other dark creatures.
One possibility is that Harry's late arrival at Hogwarts could change the dynamics of the relationships he forms. For instance, instead of being in the same boat as the first - years from the start, he might end up befriending some older students who take him under their wing. Also, his late start could mean that he discovers parts of Hogwarts that others haven't yet, like secret passages or rooms that are only accessible to those who arrive late or are in a certain situation.
A good Wednesday Addams fanfiction should first and foremost stay true to her character. She's dark, sarcastic, and has her own unique view of the world. If a fanfic can capture that essence, it's on the right track. For example, stories where she doesn't shy away from the macabre or where she uses her sharp wit to deal with situations are great.
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, 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.