One common theme is the struggle between good and evil within Danny. It often shows how his normal self battles his evil side. Another theme is the impact on his relationships. His friends and family have to deal with this new, dangerous Danny.
One interesting Danny Phantom Danny Evil fanfiction could be 'The Dark Turn'. In it, Danny's evil side really takes over and he starts to cause chaos in the town. It shows a different side of his character and how the relationships with his friends and family change as a result.
In Danny Phantom Evil Danny fanfiction, the way Evil Danny interacts with other characters can be really fascinating. He might manipulate his friends or foes in unexpected ways. For example, he could use his powers to deceive them into doing things that serve his evil plans. This creates a lot of tension and interesting plot twists.
I'm not sure of specific titles off the top of my head, but you can start by looking on popular fanfiction websites like Archive of Our Own. Just search for 'Danny Phantom Evil Danny' and you'll likely find a bunch of interesting reads. Check out the ones with high ratings and lots of reviews.
However, there could also be a glimmer of the old relationship. Maybe deep down, Evil Danny still has some feelings for Sam, and she tries to use that to her advantage. But it's a dangerous game, as Evil Danny could easily turn on her. This complex mix of emotions and power dynamics would make their relationship very different from what it was when Danny was good.
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.
Another theme is the struggle between good and evil within the Danny Phantom universe. In these fanfictions, the balance is tipped towards evil, and we see how the other characters deal with that. For example, Sam and Tucker might have to find new ways to combat an evil Danny, which involves a lot of moral and ethical decisions on their part. They have to decide how far they are willing to go to save their friend and protect the town.
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.