The most common characters in Danny Phantom Ultimate Enemy fanfiction are Danny, of course. He's the main character so he's always there. Vlad is another one. He has so much potential as an antagonist. Sam and Tucker are also popular as they are Danny's support system. Additionally, some of the more powerful ghost villains like Pariah Dark also make appearances. They add more danger and drama to the stories as they are extremely powerful foes that Danny has to face. Plus, Danny's parents sometimes play important roles as well, especially when their inventions or their knowledge of the ghost world get involved in the plot.
Sam and Tucker are also great characters to include. They are Danny's best friends and can provide support, comic relief, or get into trouble themselves, adding more layers to the fanfiction.
One idea could be exploring what would happen if Danny made a different choice during his encounter with the ultimate enemy. For example, if he tried to reason with his enemy instead of fighting right away.
One interesting plot twist could be that Danny's ultimate enemy turns out to be a future version of himself who was corrupted by too much power. Another might be that the enemy is actually someone he thought was a friend all along, but was secretly plotting against him. And sometimes, the ultimate enemy is an alternate version of Danny from a parallel dimension where he made different choices and became evil.
First, you need to understand the characters well. Know Danny's ghost - fighting abilities and his personality, like his sense of humor and loyalty. For Spider - Man, study his web - slinging, his quick thinking, and his sense of responsibility. Then, come up with an interesting plot. It could be a simple adventure where they work together, or a more complex story with twists and turns. Don't forget to add some dialogue that reflects their unique voices.
Well, a popular type of Danny Phantom and Ultimate Spider - Man fanfiction might involve a crossover where they exchange powers for a short time. Danny might get Spider - Man's web - slinging ability and have to figure out how to use it while still dealing with his ghost - related problems. As for Ultimate Spider - Man, he could get Danny's ghost powers and have a whole new set of challenges. Some fanfictions also focus on their love interests interacting in unique ways, like how MJ might react to Danny's otherworldly nature or how Sam might view Spider - Man.
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.
There could be a fanfic where Danny and Ember accidentally swap powers. This leads to a series of comical and also dangerous situations. Danny has to figure out how to control Ember's power of influencing people through music while Ember struggles with Danny's more combat - oriented powers. It could be a story full of self - discovery for both of them.
Another possibility is that he's facing some emotional turmoil. Danny has a lot on his plate. He has to keep his identity a secret from his friends and family, deal with school, and fight ghosts. All this stress could be causing him to lose his appetite. He might be too worried or preoccupied to even think about food.