Another possibility is that he's facing some emotional turmoil. Danny has a lot on his plate. He has to keep his identity a secret from his friends and family, deal with school, and fight ghosts. All this stress could be causing him to lose his appetite. He might be too worried or preoccupied to even think about food.
One possible story could be that Danny is facing a new and extremely powerful ghost. He needs help from his friends Tucker and Sam. Maybe they need to find a rare artifact to defeat this ghost. They could start by researching in the local library, looking through old ghost lore books. Tucker uses his tech skills to try and track down any leads on the artifact's location, while Sam uses her knowledge of the occult.
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.
Sam is also quite popular. Her goth - like personality and her strong - willed nature make her an interesting character. In fanfiction, she can be portrayed in different ways, like being even more involved in Danny's ghost - fighting activities.
In some fanfictions, Danny's mom might find out when she accidentally witnesses Danny transforming into his ghost form. Maybe she walks in on him at a crucial moment.
In a Danny Phantom trans girl fanfiction, Danny could discover her true identity as a trans girl after an encounter with a special ghost. This ghost could be like a spirit guide that shows her visions of who she really is. Danny then has to figure out how to balance her newfound identity with her ghost - fighting duties. She may also have to deal with the reactions of her family, especially her parents who might be initially confused but eventually come around.
Confident Danny in fanfiction often shows leadership. He's not afraid to take charge and guide his friends in ghost - hunting adventures. He might make decisions quickly and firmly, like deciding on the best strategy to defeat a powerful ghost. His confidence gives others the reassurance to follow him.
In fanfiction, the idea of Danny and Ember having a daughter can lead to really interesting storylines. Maybe their daughter could inherit Danny's ghost powers and Ember's musical abilities, creating a unique character. She could struggle with being half - ghost, half - something else due to Ember's unique nature, and have to find her place in both the human and ghost worlds.
Yes, there are quite a few. You can start by looking on fanfiction platforms like Archive of Our Own. There, you might find some interesting stories where the author has created unique scenarios with a female Danny. Some might explore different relationships or adventures that a female Danny could have in the Danny Phantom universe.
One idea could be exploring Danny's relationships in a different way. For example, how his friendship with Sam and Tucker might develop if they faced a new supernatural threat. Another could be a story where Danny discovers a new power and has to learn to control it while dealing with school and his ghost - fighting duties. And perhaps a fanfiction where Danny travels to an alternate dimension within the Danny Phantom universe.