Another common plot might involve Jason protecting Danny from the various threats that come from Danny's ghost - hunting world. Since Jason is used to dealing with danger in Gotham, he's well - equipped to handle the supernatural foes that come after Danny. This could lead to some epic fight scenes and a growing bond between them.
One popular storyline could be Danny trying to adjust to a new life with Jason. Maybe he has to hide his ghost powers at first, which creates a lot of comical and tense situations. For example, he accidentally uses his powers in front of Jason's friends and has to come up with quick excuses.
His powers might also make Jason more protective. Knowing that Danny is different and has these abilities that could be exploited, Jason would be extra vigilant. This could lead to some arguments as Danny might feel smothered at times, but overall it would show how much Jason cares about him and is willing to go to great lengths to keep him out of harm's way.
One popular storyline could be Jason Todd joining the Avengers on a mission to take down a powerful, universe - threatening villain. His anti - hero nature might clash with the more traditional heroic values of some Avengers, leading to interesting character dynamics. For example, his more brutal methods compared to Captain America's more idealistic approach could create tension and also opportunities for growth and understanding among the characters.
Some fanfictions might explore a storyline where the characters from Danny Phantom and Percy Jackson are swapped in their respective worlds. Percy in Amity Park having to deal with ghosts and Danny in the demigod world having to face the challenges there. This could lead to some really fun and unique character interactions. Another idea could be a crossover of their friends and allies. So, Tucker and Annabeth working together to come up with a plan, or Sam and Grover on an adventure to find a magical item that can help Danny and Percy in their fight against the combined threats of their two worlds.
Jason Todd and Sam Winchester is also a well - liked pairing. Sam's more intellectual side can complement Jason's more action - oriented nature. They could be researching together to solve a supernatural mystery. There are also some pairings with female characters from Supernatural. For example, Jason Todd and Jo Harvelle. She's a strong and independent hunter, and a relationship between them could be full of action and adventure, with both of them fighting side by side against the supernatural forces.
One common storyline is Danny's relationships with different ghostly female characters evolving in a romantic way. For example, he might have to balance his feelings for a powerful ghost princess and a mischievous ghost girl. Another could be the harem members teaming up to protect Danny from a greater threat, while also dealing with their own jealousy and competition within the harem.
There are also storylines where Jason Todd has to face his past self, his Robin self, within the Young Justice universe. This can be a very emotional and action - packed plot. It delves into his self - identity and how he has changed over time, and it's always fascinating to see how he reconciles his past with his present in these fan - created stories.
One interesting storyline could be Paulina finally realizing Danny Phantom and Danny Fenton are the same person. She could initially be shocked but then come to accept it and they team up to fight a new powerful ghost. It would add a whole new dynamic to their relationship.
Obviously, Danny and Dan themselves are very popular. Danny as the main hero and Dan as his dark and complex counterpart are central to many stories. Jazz, Danny's sister, is also popular as she can provide a different perspective and often gets involved in Danny's ghost - fighting adventures in fanfiction.
The Box Ghost is quite popular in Danny Phantom fanfiction. He's often used as a comical relief character, but can also be made into a more menacing figure in some stories. Another popular one is Skulker. His hunting nature and advanced weaponry make him an interesting character to write about. He can be a formidable foe for Danny or even an unexpected ally in certain situations.
A popular storyline is Danny's discovery of his powers. It's exciting to see how he initially reacts to being able to turn intangible and invisible. He doesn't quite know how to control it and there are a lot of comical moments as he tries to figure it out.