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.
Another possible friend for Danny could be Hermione Granger. Hermione is always interested in learning new things. Danny's powers would be a fascinating subject for her to study. She might try to find a way to explain his powers through magic or Muggle science. And Danny could benefit from Hermione's vast knowledge of magic and Hogwarts.
He might meet a nurse who has some sort of psychic ability and can sense that Danny is different. This could lead to an interesting interaction where Danny has to be extra careful.
Well, it would be a very chaotic yet interesting scenario. Danny's ghost - fighting skills could be incorporated into Defense Against the Dark Arts lessons. He might teach students unique ways to deal with spectral threats that are different from the usual magic spells. For example, his intangibility power could inspire new defensive techniques. Also, his half - ghost nature could make for some really strange and exciting interactions with the magical creatures and ghosts at Hogwarts.
In 'Danny Phantom Goes to School' fanfiction, there could be a new character who is also a half - ghost and they become friends or rivals with Danny. They could team up to fight a powerful ghost that has infiltrated the school's science lab. The school setting also allows for some interesting interactions between Danny's human friends and his ghost - hunting side. For example, his friends might accidentally discover his secret identity while they are all involved in a school project.
In the fanfiction, Danny might be in the hospital because of his ghost - fighting injuries. Maybe he has to hide his ghost powers from the doctors while trying to recover.
Maybe a new student who has some psychic abilities that attract the attention of the ghosts in the school. This student could either be a friend or a foe to Danny, depending on how the story unfolds.
One possible plot could be Danny Phantom accidentally getting zapped into the Monster High dimension. He might initially be confused as he tries to figure out the different rules and types of monsters there. He could make friends with some of the Monster High characters like Frankie Stein, who would be curious about his ghostly powers.
Danny could use his invisibility power to play pranks on the students, but also to teach them about stealth and awareness. His super strength could be used to demonstrate physical feats in a Muggle Studies class. And his ability to shoot ecto - blasts could be incorporated into a new type of combat magic training.
In this fanfiction, it could be that Danny Phantom meets a Danny Phantom from a parallel fan - made story. At first, they don't trust each other. But as they learn more about each other's worlds, they realize that there are some common elements that are being threatened. It could be that a powerful ghost is trying to rewrite all the fanfic universes related to Danny Phantom. So, they must combine their strengths and knowledge to stop this from happening.