Maybe the alien surf girls are from a planet where surfing is a sacred activity. They come to Earth to learn more about our surfing culture and in the process, they make friends with local surfers and teach them some of their unique surfing techniques.
Another interesting concept is that the alien surf girls are on the run from their own kind. They find solace in surfing on Earth and form a bond with a group of humans who help them hide while they figure out how to deal with the situation back on their home planet.
First, create your characters. Decide on their appearances, personalities, and the special abilities they might have as aliens. For example, one girl could be really shy but have the power to control the waves.
One idea could be exploring the backstories of the dangerous girls in more detail. Maybe one of them has a secret past that led her to become 'dangerous' like she was wronged in the past and is now seeking revenge. Another idea is to create a new adventure for them, like they have to break into a highly - secured place to steal a powerful artifact that could change their fates.
A fun plot might be that they discover a hidden treasure in the diner. It turns out the building was once a part of an old bootlegger's operation and there's a stash of valuable items. But they have to deal with a local gang who also has their eyes on the treasure, leading to all sorts of wacky adventures.
One interesting idea could be the change in the characters' personalities that might come with the clothes swap. For example, a character who is usually shy might become more confident when wearing the clothes of a bolder character. It can also lead to new relationships forming as the characters interact in different ways due to their new looks.
One popular alien anime girl fan fiction could be about an alien girl who comes to Earth to study human culture and ends up making friends at a local school. She might have unique powers like telekinesis which she uses to protect her new friends from bullies.
Well, you could write a fan fic where the relationships between the characters are reversed. So if in the original there are certain rivalries, in the fan fic they become allies and vice versa. Also, a story about a character who loses their power but discovers a new way to be strong within the 'unordinary' world would be interesting. Or how about a fan fic that takes place in a parallel dimension within the 'unordinary' universe where the rules of powers are slightly different?
Some interesting ideas for Riverdale fan fiction could be a crossover with another popular teen drama. Imagine the characters of Riverdale meeting the characters from 'Stranger Things'. It would be really cool to see how they interact. You could also write a fan fiction that focuses on the future of Riverdale. What will happen to the town and its residents ten years from now? Will Archie still be in town? How will Veronica's business empire develop?
You could write a fan fiction about a Pokemon trainer who has the unique ability to communicate with Pokemon on a deeper level than others. This trainer goes on a journey to solve the mystery of why some Pokemon are becoming more aggressive. Along the way, they meet different Pokemon species and form strong bonds with them. They might discover that there is an unseen force affecting the Pokemon's behavior, like a new type of pollution or an ancient curse.
One idea could be to write a fan fiction where Bluey and her family go on an adventure to a magical land. They could meet new characters and have to solve puzzles to get back home.
Some cool ideas for Pokemon fan fiction are stories about Pokemon with unique abilities that are different from what's in the games or anime. For example, a Pikachu that can fly. Or a fan fiction about a group of misfit Pokemon who form their own team to compete in the Pokemon League against the traditional trainer - led teams. You could also write a fan fic that delves into the origin of a particular type of Pokemon, like how the Ghost - type Pokemon came to be.