Who would be the main antagonist in a Danny Phantom becomes Jack Frost fanfiction?

A powerful ice - demon could be a great antagonist. It could be jealous of Jack Frost's power over winter and Danny's ghost powers, so it tries to take over their powers and rule both their worlds.

One possible plot could be that Danny Phantom, through some magical mishap or powerful spell, is transported to the world where Jack Frost exists. Danny has to figure out how to get back home while also dealing with the new powers and rules of Jack Frost's world. He might start out as an outsider but gradually gain the respect of the other winter spirits as he uses his ghost - fighting skills in a new way.

The Guys in White could be the main antagonists. If Danny becomes evil, they might see this as their chance to finally capture and experiment on him. They would be constantly chasing him, which would make Danny see them as the main obstacle in his new evil plans, and thus they would be the antagonists in the story.

It could be Sam and Tucker. Since Danny has become a villain, his former friends would likely try to stop him. They would be the main antagonists from Danny's point of view now. They would use their knowledge of Danny and their own skills to try and bring him back to the good side.

Perhaps a corrupted version of one of their friends or allies. For example, a possessed Tucker or Beast Boy. This would create an interesting dynamic as Danny and Raven would be hesitant to fight their friend at first but would have to find a way to save them from the corruption while also stopping the harm they are causing.

There are indeed fanfictions with Danny Phantom and Jack Frost. Fanfiction writers enjoy taking characters from different universes and melding them together. In the case of Danny Phantom and Jack Frost, it can lead to really interesting stories. One might imagine a scenario where the two discover a hidden connection between the Ghost Zone (from Danny Phantom) and the world of winter spirits (from Jack Frost). Writers can play with their powers, personalities, and backstories to create engaging and original fan - made tales.

It could be Vlad Masters from Danny Phantom's world. He might follow Danny through the encounter with Gaster and see new opportunities for power in this strange new world. He could team up with some of Gaster's enemies in the new world to cause trouble for Danny and Gaster.

Another theme is adventure. They are both from different fantastical worlds, so fanfiction might take them on new quests or battles. For example, they could be on a mission to save a magical artifact that is important to both of their worlds. This can lead to a lot of exciting action scenes and character development as they face challenges together.

Yes, there are likely fanfictions out there with such a premise. Fanfiction writers often come up with creative and unexpected relationships between different fictional characters. They might explore how Danny Phantom's powers and his character would be affected by being Jack Frost's son, and could create really interesting storylines that combine the elements from both universes.

Yes, there are quite a few good ones. You can start by looking on popular fanfiction websites like Archive of Our Own. Some stories might focus on their adventures together, combining the unique powers and worlds of Danny Phantom and Jack Frost.