You can try Archive of Our Own (AO3). It has a large collection of fanfics, and you're likely to find many 'Pacifica x Dipper' ones there. Fanfiction.net is also a good place to look.
There are several places to find 'Pacifica x Dipper fanfic'. Firstly, Archive of Our Own (AO3) is renowned for its vast collection of fan - created works. The site allows for detailed searches, so you can easily locate fanfics about this pairing. Fanfiction.net is another long - standing platform with a wide range of fanfics. You can search by the characters' names or the show's name, 'Gravity Falls'. Some Discord servers dedicated to Gravity Falls may also have channels where members share their favorite 'Pacifica x Dipper' fanfics, so it's worth exploring those as well.
There's a fanfic where Pacifica invites Dipper to her family's Christmas party at the manor. It's interesting because Dipper is out of his comfort zone among the rich and snobby Northwests. But through the night, he and Pacifica share some sweet moments, like decorating a forgotten corner of the manor together and sharing their Christmas wishes, which brings them closer.
One common theme is friendship development. Since they start off not really getting along in the show, many fanfics focus on how they gradually become friends or more. Another theme is mystery - solving, as they often team up to figure out strange happenings in Gravity Falls.
Well, first of all, the characters' growth is important. Dipper might become more confident around Pacifica, and Pacifica could learn to be more down - to - earth. The holiday traditions are also key. They could participate in things like building a snowman together, or going to a Christmas market. And of course, there's the element of the unknown. Maybe there's a secret Santa in Gravity Falls who is causing some chaos, and Dipper and Pacifica have to figure it out.
The fanfic might focus on Dipper and Pacifica's relationship during the Christmas season. They could start off as friends who gradually realize they have deeper feelings for each other. They might exchange Christmas gifts that have special meanings, like Dipper giving Pacifica a book about the hidden secrets of Gravity Falls that he has annotated with his own thoughts and discoveries.
There are likely fanfics that center around their character development in relation to each other. Maybe a story where Pacifica helps Dipper gain more confidence in social situations among the Gravity Falls residents, or vice versa. These types of stories can be interesting without any erotic elements.
Love and growth are key elements. Their relationship has developed over time, so showing how they've come to love each other deeply is important. Also, the setting. It could be in Gravity Falls itself, with all its unique scenery and strange occurrences as a backdrop. Another element is the guest list. Which characters from the show would be there? And how would they interact? For example, Wendy could be there, giving Dipper some brotherly - sisterly advice before the big moment.
One popular 'Pacifica x Dipper fanfic' is 'A Change of Heart'. It beautifully explores their relationship development. Another great one could be 'Unexpected Bonds' which delves into how they overcome differences. There's also 'Summer Memories' that focuses on their adventures together during the summer.
A lesser - known but still useful place to look for Dipper x Pacifica fanfic is Wattpad. It has a growing collection of fan - made stories. While it may not be as focused on Gravity Falls as the other platforms, you can still find some interesting takes on the Dipper and Pacifica relationship there. Just be prepared to do some more sifting through other types of stories.
One popular Dipper x Pacifica fanfic could be 'The Unexpected Bond'. It delves into how Dipper and Pacifica, who seem so different at first, start to understand each other on a deeper level. Their interactions are filled with the awkwardness and charm that is typical of young love. Another one might be 'A Change of Heart', where Pacifica's icy exterior melts because of Dipper's unique personality.
One interesting setting could be the North Pole. Imagine Dipper and Pacifica getting magically transported there while trying to solve a mystery in Gravity Falls. They meet Santa's elves and reindeer and have to help save Christmas from some sort of threat.