You can try searching on fanfic websites like Archive of Our Own (AO3) or Fanfiction.net. They usually have a wide range of Gravity Falls fanfics, including ones with the Dipper x Pacifica pairing. Just use the search function on those sites and look for relevant tags.
One great fanfiction could be 'The Unlikely Bond'. It explores Dipper and Pacifica's relationship as they team up to solve a mystery in Gravity Falls that's been overlooked by the other characters. Their different personalities create an interesting dynamic.
Common themes in 'Gravity Falls Dipper x Pacifica' fanfics include acceptance. Dipper has to accept Pacifica's flaws and vice versa. There's also the theme of adventure. Since it's set in Gravity Falls, they often go on adventures together which strengthens their bond. And the theme of transformation. Their relationship transforms them as individuals. Pacifica becomes more empathetic and Dipper becomes more confident in his relationships outside of his family and friends.
A Dipper and Pacifica lemon fanfiction could be quite interesting if it was done tastefully. It might delve into their characters' growth and how their relationship could develop. For example, it could show how Pacifica overcomes her snobbishness through her interactions with Dipper, and they could have some sweet and tender moments together, perhaps while exploring the strange and magical parts of Gravity Falls.
There are many fanfictions out there about Dipper and Pacifica's kiss in Gravity Falls. Some might focus on the build - up to the kiss, exploring their relationship development throughout the series that led to this moment. It could show how they overcame their differences, like Dipper being the curious outsider and Pacifica being from a more privileged and initially snobbish background.
Another good one is 'Pacifica's New Perspective'. This fanfic shows how Pacifica's view of Dipper changes over time and how they grow closer. It has some really sweet moments as well as some more intense, emotional scenes that make it an engaging read.
One common theme is self - discovery. Both Dipper and Pacifica are in a new environment in high school, and they often learn more about themselves through their interactions. For example, Pacifica might realize she doesn't have to be so uptight all the time.
One great fanfic to check out is 'Dipper and Pacifica's High School Adventures'. It has an interesting plot where they team up for a school project and start to see each other in a new light. The author does a great job of capturing their personalities from the show.
Common themes often include the development of Dipper and Pacifica's relationship. It might explore how their different personalities - Dipper's inquisitive and adventurous nature and Pacifica's more refined and initially snobbish one - interact and grow closer. There could also be themes of mystery-solving together, as is common in the Gravity Falls setting.
They have an interesting dynamic. Dipper is the curious and nerdy type, while Pacifica is the preppy rich girl. Their differences make for a lot of potential for character development and interesting storylines.