Well, for the Danny Phantom side, Sam and Tucker could be involved. Sam might be jealous at first when other girls start showing interest in Danny. Tucker could be the one giving Danny advice on how to handle the harem situation. From other shows, if it's a crossover with a magical girl anime, characters like Sailor Moon could be part of the harem. Her kind and powerful nature would make an interesting dynamic with Danny. Another could be Kim Possible. She's a strong and capable girl who would likely be intrigued by Danny's powers and get involved in his adventures, and potentially develop feelings for him.
Maybe Danny gets transported to a different dimension where there is a harem - like society. The local girls there are intrigued by his ghost powers and his heroic nature. They start following him around, and he has to figure out how to deal with their attention while also trying to find a way back home. Some of the girls might be from different species, which could add more interesting elements to the story, like different cultural norms regarding relationships.
I like the idea of a Danny Phantom and Ben 10 crossover. Ben has the Omnitrix which gives him access to different alien forms, and Danny has his ghost powers. They could either be rivals at first, each thinking their powers are better, or they could quickly team up to face a threat that requires both their unique abilities. It would be a fun clash of two very different power - based universes.
Danny himself is obviously a common character as the center of the harem. Sam and Tucker are often included as well, with Sam sometimes being part of the harem or at least a key figure in Danny's life in the fanfiction. There are also various female ghost characters like Ember or Kitty who are frequently added to the harem due to their interactions with Danny in the original show.
Yes, there are some interesting ones out there. You can start by looking on popular fanfiction websites like FanFiction.net or Archive of Our Own. Just search for 'danny phantom ghostly harem' and you'll find a variety of stories with different takes on the concept.
One idea could be that Danny, as a half - ghost, has to prove himself to the Ghost King. Maybe there's a tournament in the Ghost Zone where Danny enters to show his worth. This could lead to some epic battles and alliances with other ghosts.
One idea could be that Danny, with his ghost powers, ends up in the RWBY universe. He could team up with Team RWBY to fight off Grimm that are being influenced by some sort of ghostly energy. His intangibility and flight would be really useful in battles.
Another plotline could involve jealousy among the members of the harem. Each character might have their own reasons for being attracted to Danny, and when they see him spending time with others in the harem, it could lead to some intense emotional moments. This can create a lot of drama and character development.
There might be. A lot of fanfiction depends on the creativity of the writers. Some might focus on the power dynamics between the Ghost King Danny and his harem, while others could explore more of the relationships in a romantic or comical way. It's all about exploring the characters in new and interesting settings that the original show might not have delved into.
One of the main themes is probably the exploration of different personalities in the harem. Each character in the harem would have their own unique personality, and seeing how they all mesh with Danny's personality is interesting. There could also be a theme of self - discovery for Danny. Through his interactions with the harem, he might learn more about himself and his own desires. Additionally, the theme of cultural differences could be present if the harem members come from different backgrounds in the Danny Phantom universe.