A really interesting plotline is when the half - zombie part of Danny starts to influence his ghost side in unexpected ways. Maybe his ghostly powers become more 'undead' like, such as his ice powers now having a decay effect. This can lead to some really cool battles and interactions with other characters.
Some common themes include acceptance. Danny has to accept this new half - zombie part of himself, and those around him also need to accept it. Survival can also be a theme. If being half - zombie brings new threats or weaknesses, Danny has to find ways to survive. And there might be a theme of transformation. Not just the physical transformation into a half - zombie, but also the mental and emotional transformation that comes with it. He may have new instincts or desires that he has to learn to manage.
Well, I've come across a fanfiction that focuses on Danny's emotional journey as a half - zombie. In this story, Danny is not only dealing with the physical changes but also the mental ones. He has to hide his new state from his family and friends at first. It's a long and detailed story that really makes you feel for Danny as he tries to come to terms with being part - zombie.
Writers can start by mixing the characteristics of Danny Phantom and zombies. For example, give a character the speed and agility of Danny but the rotting look of a zombie on one side of their body. Another way is to create a character who was a normal human before but got caught in an experiment that made them half - zombie - like Danny's origin story but with a zombie twist. They can also play with the character's personality. Maybe a half - zombie character is super shy because they're afraid of being rejected due to their appearance, but is secretly very powerful.
Another plotline could involve jealousy among the members of the harem. Each character might have their own reasons for being attracted to Danny, and when they see him spending time with others in the harem, it could lead to some intense emotional moments. This can create a lot of drama and character development.
One possible interesting plotline could be Danny facing a new and more powerful ghost that has a personal vendetta against him. This would test his limits and force him to discover new powers or ways to fight.
One unique element can be the combination of the supernatural with medical settings. For example, Danny might have ghost - related ailments that normal medicine can't cure. So, they have to find ghostly remedies within the hospital. Another is the interaction between Danny and the hospital staff who might be freaked out by his powers.
One possible plotline could be Danny getting transported to the Naruto universe and somehow obtaining the Sharingan. He then has to learn to use it while still having his ghost powers, which could lead to some really cool battles against Naruto - universe villains.
One possible plotline could be Evil Danny trying to corrupt Sam. He might use his powers to manipulate situations and turn Sam against their friends. For example, he could make it seem like their friends are in danger when they're not, just to make Sam question their loyalty.
Sure. There's a fanfiction where fem Danny travels to an alternate dimension where all the ghosts are female too. It has a really interesting take on the gender aspect of the 'Danny Phantom' world. The interactions between fem Danny and the female ghosts are both funny and full of unexpected twists.
One interesting plotline could be Danny struggling to keep his two identities separate when a new villain targets him specifically because of his dual nature. This creates a lot of tension and action scenes as he tries to protect his loved ones without revealing his secret.