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.
There is also the storyline where Danny travels to the Ghost Zone to find something important. In the Ghost Zone, he encounters all kinds of strange and unique ghosts and has to navigate through this otherworldly place while facing many challenges.
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.
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.
One possible storyline could be that Sam is influenced by a new, mysterious character in town. This character might be using some sort of mind - control or persuasion power on Sam, making her act out of character and cheat on Danny. Another idea is that Sam and Danny have a big fight over Danny's ghost - hunting duties. Sam feels neglected and in a moment of weakness, she might get involved with someone else.
One possible storyline could be that Danny is pushed to the edge by constant bullying at school and the stress of hiding his ghost powers. This leads him to gradually embrace the darker side of his powers and become Dark Danny. For example, Dash's continuous taunts and the school's overall negative attitude towards him make him lose faith in humanity.
One possible storyline could be Danny facing a new, more powerful ghost while also dealing with his regular high - school drama. In this fanfiction, the Dash x Danny aspect might add a layer of unexpected friendship or rivalry as Dash discovers Danny's secret identity and has to decide whether to support or expose him.
One popular 'Danny Phantom Danny Dies' fanfiction might be 'The Aftermath'. In this type of fanfiction, the story often explores how the other characters deal with Danny's death. For example, Sam and Tucker may go through a period of extreme grief and guilt, wondering if they could have done something to prevent it. Another could be 'A World Without Danny', where the entire Amity Park starts to change in unexpected ways due to Danny's absence, showing how much of an impact he had on the town.
One interesting storyline could be Valerie discovers Danny's secret identity in a really unexpected way, like during a ghost attack where she's about to capture him but then realizes who he really is. It adds a whole new layer of drama to their relationship.
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.
The 'phantom kidnaps danny fanfiction' might start with a sudden abduction. Danny could be going about his normal day, and then this phantom appears out of nowhere and takes him. The setting could be really important here. If it's a spooky old mansion or a dark forest, it adds to the atmosphere. The story could also explore Danny's relationships. Maybe his friends or family start a search for him, and in the process, they discover secrets about the phantom and Danny's connection to it that they never knew before.
One popular theme is Danny's struggle with his dual identity. Fans often explore how he manages to keep his Phantom and Fenton personas separate while also dealing with the challenges that come with each. Another theme is his relationships, like his friendship with Sam and Tucker which can be developed further in fanfiction. Also, his battles against new ghosts and how he discovers new powers can be a common theme.