One idea could be that the Joker somehow finds his way into the Danny Phantom universe. Maybe he teams up with one of Danny's villains, like Vlad, thinking they can cause more chaos together. They could plan to use Danny's ghost powers for some really wild and dangerous stunts across both the human and ghost worlds.
One idea could be exploring how Danny's powers interact with the chaotic and villainous nature he might inherit from being Joker's son. For example, his ghost powers might take on a more menacing or unpredictable quality.
The unique elements often include the clash of two very different worlds. Danny Phantom comes from a world of ghosts and superpowers, while the Joker is from a gritty, crime - filled Gotham. Their different moral compasses make for some interesting interactions.
Well, if Danny Phantom was raised by the Joker in a fanfiction, it would be a wild ride. Danny's moral compass, which was originally set towards good, would be severely challenged. The Joker's unpredictable and often violent behavior would force Danny to adapt in strange ways. He might start seeing the world as a big joke, and his relationships with his friends and family from the original story would be completely upended. His ghost powers could be exploited by the Joker for his own mad schemes, leading to some really chaotic and unexpected plot twists.
One popular joker and danny phantom fanfiction is 'The Unlikely Alliance'. It's really interesting as it explores how the Joker's chaotic nature clashes and then somehow meshes with Danny Phantom's ghostly abilities. It has some great action scenes.
The Joker would probably be both intrigued and excited. He might see Danny's powers as a new and interesting toy to play with. He could try to find ways to manipulate Danny into using his powers for the Joker's own chaotic purposes. For example, he might trick Danny into using his intangibility to break into a high - security building so the Joker can plant some crazy bombs or something.
He could also develop relationships with other characters in new ways. Maybe he forms an unlikely friendship with a Batman - like figure who sees the good in him and tries to help him break free from the Joker's shadow. Or he could have a falling out with his friends from the Danny Phantom world who are scared of his newfound connection to such a dangerous villain.
His powers would likely be used more for malevolent purposes. Instead of using his intangibility to avoid danger and protect others, he might use it to sneak up on people and startle or harm them.
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.
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.