In the fanfiction, the fem Danny Phantom might hate Christmas because it represents a time when she feels most different. If she's a half - ghost, Christmas might be a time when she's acutely aware of not fitting in with either the human or the ghost world. All the normal human traditions and the special 'ghostly' events during Christmas might make her feel isolated. For example, humans are busy with their family dinners and gift - giving, while ghosts might have their own spooky celebrations. She, being in between, has nowhere to belong during this time, thus leading to her hatred for Christmas.
Yes, there are some. You can usually find them on fanfiction websites. Just search for 'Fem Danny Phantom Hates Christmas' on popular fanfic platforms.
In fanfiction, Danny Phantom could hate Christmas due to personal reasons related to his double life. Maybe he has had bad experiences during past Christmases. For example, he might have been unable to fully enjoy the holiday because he had to deal with a major ghost threat right in the middle of Christmas dinner. Or perhaps he's jealous of how normal people get to celebrate without the added stress of being a half - ghost.
In some fanfictions, Danny Phantom may hate his parents because they are constantly trying to hunt him down. His parents are ghost hunters and they don't know that Danny is actually half - ghost. So their actions of trying to capture and study ghosts put Danny in a dangerous and uncomfortable position, which could lead to feelings of hatred.
In some fanfiction, the writers might be exploring a darker version of Danny Phantom. His hatred for Amity Park could stem from feeling trapped there. He has all these ghost - fighting responsibilities in Amity Park, and he might just be sick of it. He could be longing for a normal life away from the constant chaos and danger that the town represents to him.
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.
Well, it could be that Danny is really into the Danny Phantom world and reading fanfiction about it is like a form of 'feeding' his love for the series. Maybe he finds new and exciting ideas in the fanfiction that he can't get from just the original show.
In some fanfictions, Danny's mom might find out when she accidentally witnesses Danny transforming into his ghost form. Maybe she walks in on him at a crucial moment.
Another concept could be that Danny gets a Christmas wish from a magical being. But the wish has unexpected consequences that start causing chaos in Amity Park. He then has to find a way to reverse the wish while still enjoying the Christmas spirit with his family and friends.
A new, powerful ghost that hates the Christmas cheer could be the main antagonist. This ghost could be spreading gloom and trying to cancel Christmas in Amity Park. Danny would have to figure out the ghost's motives and stop it from ruining everyone's Christmas. For example, it might be a ghost who was once a Scrooge - like figure in life and now wants to make others as miserable as he was.
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.