Maybe the fanfic could start with Mabel finding a lemon - shaped amulet. When Dipper touches it, they get transported to a parallel Gravity Falls where everything is lemon - themed. They have to find a way back while dealing with the wacky versions of the townspeople. This would allow for a lot of creative scenarios and character interactions.
A possible plot could be that there's a lemon - loving creature in Gravity Falls that only Dipper and Mabel can communicate with. The creature needs their help to protect its lemon grove from an evil force. As they work together, Dipper and Mabel learn more about each other and their bond grows stronger in the process.
They could start by sharing their love for lemons. Maybe they discover a new lemon - based dessert in town and bond over trying it. This simple shared interest can be the starting point for deeper conversations and understanding between them.
One idea could be that Dipper discovers an old journal entry that seems to predict a strange adventure involving him and Wendy. Maybe it leads them to a hidden part of the forest where they have to solve a series of puzzles to get out. Another plot could be that Wendy's friends play a prank on Dipper that goes too far, and Wendy has to make it up to him by going on a quest with him. For example, they could be looking for a mythical creature that Dipper believes exists.
One idea could be a story where baby Dipper and Mabel discover a magical creature in the woods near their home in Gravity Falls. The creature is lost and they decide to help it find its way back. Another could be a fanfic about their first day at daycare in Gravity Falls and all the strange things that happen there. Maybe they meet other kids with unique abilities or find a secret part of the daycare.
Well, lemon fanfictions are not something that should be promoted as they violate the family - friendly nature of 'Gravity Falls'. However, for normal Dipper and Mabel fanfictions, you could check out Archive of Our Own. There are many well - written stories that explore their relationship as siblings, their growth during their time in Gravity Falls.
They also often have great plotlines that involve their relationship. It could be about how they support each other through difficult times or how they have adventures together. Many good fanfics will also include elements from the original show, like the strange creatures and mysteries of Gravity Falls.
A good one often has in - character portrayals. Dipper's curiosity and Mabel's bubbly personality should be accurately represented. For example, in a story where they go on an adventure together, Dipper would be the one asking questions and trying to figure things out, while Mabel would be making friends with strange creatures.
One idea could be that Female Dipper discovers a way to enter Bill's dimension. There, she tries to understand his chaotic nature. Maybe she finds a side of Bill that's not entirely evil and they form an unlikely bond. For example, Bill could be facing some sort of threat in his own dimension that only Dipper, with her unique human perspective, can help with.
Another interesting plot could be that there's an ancient vampire curse in Gravity Falls, and Dipper gets caught up in it. He has to find a way to break the curse before it's too late, and in the process, he discovers more about the history of the town and its connection to vampires. This could involve teaming up with Mabel and other characters from the show to solve the mystery.
One common theme is sibling adventures. Since Dipper and Mabel are siblings, a lot of fanfictions explore their relationship further while they go on different adventures in Gravity Falls. Another theme is mystery - solving. It's in line with the overall tone of the show, so fanfic writers often create new mysteries for the twins to solve.
Adventure themes are great. For example, they could go on a new mystery - solving adventure in Gravity Falls that the show didn't cover. They could encounter new strange creatures and solve puzzles together.