In a sense, it could be thought of as related to the idea of Ghost Rider fanfiction. Danny Phantom is about a boy who becomes a half - ghost and has to navigate a world of ghosts and other strange phenomena. This is somewhat similar to Ghost Rider's journey with his otherworldly powers. But Danny Phantom is an independent creation with its own lore. It has its own backstory for Danny's transformation, his relationships with other characters like his friends and family, and different antagonists. So while there may be some fanfiction - like connections, it stands on its own as a unique story.
I really like 'Danny Meets the Rider'. In this fanfic, Danny accidentally crosses paths with Ghost Rider while dealing with a powerful ghost in his own town. The way the two characters interact, with Danny's quick thinking and Ghost Rider's brooding presence, makes for a really engaging read. It also has some cool fight scenes where their powers clash in unexpected ways.
One similarity is the theme of the supernatural. Just as Ghost Rider is all about a character with otherworldly powers and a connection to the spirit world, Danny Phantom also features a character, Danny, who has to deal with the world of ghosts. The battles they fight, whether it's Danny against ghosts or Ghost Rider against the forces of evil, are also somewhat alike in the sense that they are using their special powers to combat their foes.
The combination of different supernatural elements. Danny Phantom has his own set of ghostly powers and abilities, while Ghost Rider is this otherworldly, hell - bound entity. When they're brought together in fanfiction, it creates a really unique and exciting dynamic.
One interesting story could be about Danny Phantom getting the powers of a Kamen Rider and using them to fight supernatural threats in both his world and the Kamen Rider world. He might team up with a Kamen Rider to take on a powerful ghost - demon hybrid villain.
Sam Manson would be an excellent addition. Her strong - willed and goth - like nature can add an interesting dynamic. From the Kamen Rider side, if we consider Kamen Rider W, Shotaro Hidari could be included. His detective skills combined with Danny's ghost - hunting abilities would make for some great mystery - solving scenes. And let's not forget Jazz Fenton, Danny's sister. She could provide some emotional support and also get involved in the action in her own way.
One great Danny Phantom Ghost King fanfiction is 'The Reign of the Ghost King'. It delves deep into Danny's new role as the Ghost King, exploring how he balances his human life with his ghostly duties. The character development is really well - done in this fic.
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.
In a lot of fanfictions, Danny himself often becomes the most powerful ghost. As he grows and learns to control his powers better, he can surpass many of the traditional powerful ghosts in the show. For example, in some fics, he gains the ability to absorb other ghosts' powers, making him extremely formidable.
Archive of Our Own (AO3) is also a great place. There are many well - written 'Danny Phantom' fanfictions there. The tagging system makes it easy to find the ones about ghost speak. You might have to do a bit more digging compared to fanfiction.net, but it's worth it as the quality of the stories can be really high.