One idea could be that Danny's deep voice is a result of a new ghost power he acquires. This power makes his voice so deep that it can paralyze enemies. He has to learn to control it while also using it to his advantage in battles against powerful ghosts.
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.
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.
His deep voice might make his friends initially think he's being possessed or something's wrong. They could be a bit scared or hesitant around him at first.
One idea could be that Danny gets an illness that affects his ghost powers. For example, he might start losing control over his intangibility or invisibility. This could lead to some really comical or dangerous situations. Another idea is that his friends try to find a cure for his strange ghost - related illness while also keeping it a secret from the town.
Well, perhaps in the fanfiction, Undergrowth could create a parallel dimension filled with his overgrown plants and trap Danny there. Danny then has to navigate this strange new world, make allies among the plant - like creatures that are also being oppressed by Undergrowth, and find a way to break out and stop Undergrowth from spreading to the real world. This would be an exciting adventure full of mystery and discovery for Danny.
Maybe in the fanfiction, Danny's mom accidentally gets transported to the Ghost Zone and Danny has to go on a wild adventure to rescue her. Along the way, he discovers new things about his powers and his family's connection to the Ghost Zone. This could lead to some really emotional moments between Danny and his mom as they reunite and face new challenges together.
Well, a great plot for Danny Phantom Planet fanfiction could be about Danny's life after saving the planet. He might face new challenges like dealing with the fame that comes with being a hero. Some people could idolize him while others might be jealous or even fear him. You could also write about Danny trying to balance his normal life with his superhero duties on a more global scale. He could have to travel around the world to solve problems related to the changes that occurred during the Planet event.
Well, here's a plot. In a strange turn of events, Danny's ghost powers start to interact with alicorn magic in unexpected ways. This causes chaos in both worlds. The alicorn and Danny must work together to figure out how to stop the strange energy fluctuations. They might have to travel to different dimensions within their universes to find a solution. Along the way, they meet other characters from both franchises who either help or hinder their progress.
One idea could be that the twin has a different set of powers. For example, while Danny can go intangible and invisible, the twin might have the power to control time on a small scale. This would create interesting scenarios where they have to work together, like when Danny is in a tough fight and the twin uses time - control to give him an edge.
A plot could involve a member of the Renegades having a secret past that is somehow connected to a powerful ghostly artifact. As the story unfolds, this secret could put the whole group in danger and also lead to some character development.