Well, a really cool plot is when the Reality Gauntlet starts malfunctioning and Danny gets stuck in a loop of different realities. Each reality has its own set of rules and threats. He has to quickly adapt to survive and find a way to break the loop. This often involves him using his wits more than his powers because in some of these realities, his powers are either weakened or completely different. It's a great exploration of his character growth as he has to rely on his intelligence and understanding of different situations rather than just brute force.
Obviously, Danny Phantom is one of the main characters. He's the one who usually wields the Reality Gauntlet.
One idea could be that Danny gets stuck in an alternate reality where his powers work differently. For example, instead of being able to go intangible at will, he can only do it when he's in a state of extreme calm. Another plot could involve Danny and his friends traveling through multiple realities in search of a missing piece of ghost - related technology that is crucial for the safety of both the human and ghost worlds. Or perhaps Danny enters a reality where all the ghosts are good and humans are the ones causing chaos, and he has to figure out how to restore balance.
In many Danny Phantom singing fanfictions, there's a plot point where Danny's singing is somehow connected to his family heritage. Maybe his ancestors were also great singers or had a connection to music in the ghost world. This connection adds depth to his character and his relationship with his family. Also, when Danny's singing is used to break a curse in the Ghost Zone, it creates a very exciting and unique storyline.
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.
One idea could be that Danny discovers a new ghostly power that he uses to take revenge on a group of bullies who have been tormenting his friends. He could use his intangibility in a creative way, like sneaking into their lockers and making their things disappear.
One idea could be Danny Fenton having to deal with a new ghostly enemy that can manipulate time, making his double life as Danny Phantom even more chaotic. Another could be Danny trying to balance his high school life, including exams and relationships, while also facing a ghost invasion that only he as Danny Phantom can stop. Or perhaps a story where Danny Phantom discovers a hidden power within himself that has a connection to his human side, Danny Fenton.
The theme of friendship is really prominent. Danny forming unlikely friendships with Disney characters, like befriending a mermaid in 'Danny and the Little Mermaid'. It shows how different characters from two very different universes can come together and support each other. Another theme is adventure. Danny going on wild adventures across Disney lands, exploring new places and encountering new threats. This is seen in many fanfictions where he travels through different Disney kingdoms.
A common interesting plot point is the culture shock. Danny, coming from a world where ghosts are more of a local, small - town kind of threat, suddenly being in a world full of magic like Harry Potter's. He has to learn about things like Quidditch and the different houses in Hogwarts. It's like a fish out of water story, but with a supernatural twist.
Sam and Tucker are really interesting characters to focus on. Sam's gothic personality and her strong beliefs can lead to some great storylines. Tucker's tech - savvy nature can be used in many ways, like developing new gadgets or helping Danny figure out some tech - related mysteries. And Jazz, Danny's sister, with her psychology knowledge could play a crucial role in understanding Danny's situation better in a fanfiction.
One interesting story could be about Danny and Sam going on a ghost - hunting adventure together. They might discover a new type of ghost that has unique powers and they have to figure out how to defeat it using their combined skills.