Well, there could be many Danny Phantom demo stories. For example, Danny's first encounter with a powerful ghost and how he learned to use his powers better to defeat it. Another could be about his friendship with Sam and Tucker and the adventures they had in school while dealing with the challenges of his double life as a half - ghost.
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.
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 interesting Danny and Dani fanfiction could be about them teaming up to fight a new and powerful ghost. They use their combined powers and unique abilities to outwit the enemy. For example, Dani might use her speed while Danny uses his more powerful ghost ray.
One great Danny Phantom and Danielle Phantom fanfiction is 'The Twin's Adventure'. It explores their relationship in a new ghost - fighting scenario. Another is 'Danielle's Discovery' which delves into Danielle finding out more about her powers and her connection to Danny.
A popular one is 'The Alliance of the Two Heroes'. In this fanfiction, Danny and Robin team up to fight a common enemy that is a threat to both their worlds. It delves into their different personalities and how they complement each other during battles.
Well, in this kind of fanfiction, Danny could be controlled by an ectoplasmic parasite. The parasite latches onto Danny and takes over his actions. His eyes might glow a different color to show he's not in control. His friends would first be confused, then realize something is amiss and start investigating.
There could be a fanfic where Danny and Ember accidentally swap powers. This leads to a series of comical and also dangerous situations. Danny has to figure out how to control Ember's power of influencing people through music while Ember struggles with Danny's more combat - oriented powers. It could be a story full of self - discovery for both of them.
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.