One idea could be a story where Danny and Valerie have to team up to fight a new, powerful ghost that neither can defeat alone. They start off distrusting each other but as they face challenges, they learn to work together and gradually develop feelings for each other.
You can try Archive of Our Own (AO3). It has a large collection of fanfictions for various fandoms, including Danny Phantom. Just use the search function and type in 'Danny Phantom and Valerie Gray' to find relevant stories.
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.
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 great one to start with could be 'The Ghostly Guardian'. It really delves into Danny's growth as a hero. Another good option is 'Phantom's New Beginnings' which gives an interesting take on his relationships. And 'Danny's Secret Allies' is also quite engaging as it introduces some new and unique characters.
Well, one aspect could be the role of their superpowers in the pregnancy. Perhaps Sam's pregnancy has some unexpected effects on Danny's powers or vice versa. And the story could also delve into how they prepare for the new arrival in a world full of ghosts and other supernatural elements.
One interesting 'Danny Phantom Danny and Ember' fanfiction could be where Danny and Ember team up to fight a new, powerful ghost that threatens both the human world and the Ghost Zone. They start off as reluctant allies but gradually come to respect each other's powers.
One common theme is the power struggle. Ember has her own set of powers and often tries to overpower Danny, either for her own gain or just for the fun of it. So there's a constant back - and - forth in terms of who's in control.