TodancoBills

Like, they are both such lonely boys. Neither really had any friends their age outside immediate family that they could bond with, and I can really see them hitting it off. They're very similar, but have enough differences that I can see them having some great chemistry. They would be probably annoy eachother and argue lots (but being able to argue in depth is probably something they'd enjoy deeply), but I also think they would understand eachother in a way neither has had before because they're so dang smart for kids. (Not including vat7k)

I have enough ideas that I can see myself making an au fanfic. My idea was that Bill accidentally rips space-time a bit between gravity fall's universe and the tangled universe by having a tantrum, enough that poor, unsuspecting 13 yo Varian triggers a portal to open when experimenting with a magical mineral.

Of course, he is spit out of the portal onto poor, unsuspecting Dipper Pines who was just trying to read the cool new journal he found.

Varian would then spend the summer with the Pines twins, who snuck him into attic to live with them under Stan's eye. He knows of course, but since the kid has no where else to go, he looks the other way. Varian would get along great with the Pines, join in on adventures, and figure out how alchemy works here as he tries to get back home. Dipper would of course be more than happy to help him sort through what everything is called in this world, and introduce him to both modern science and the paranormal. Varian in turn gains a very eager lab assistant that wants to learn everything he can about his alchemy.

They fall in love slowly through out the summer, and when Ford is able to build a one time portal to send him back, Dipper promises to find a way they can see eachother again. Their first kiss is right before Varian steps through the portal, the only things he takes from gravity falls is a scrap book Mabel made him, and a necklace that can send out a distress signal across dimensions (Dipper spent 3 all nighters with Ford to help make it.)

Fast forward a year and a bit to the tangled series' story starting, and Varian having his villain arc.

He sends out the distress signal when he returns home from the castle to see his father completely encased in amber, but Dipper isn't able to get to Corona before Varian is arrested for the crimes he commits.

Dipper, absolutely panicked for the weeks he's trying to finish up a stable portal between their dimensions, is only able to make an unstable prototype that he would have to try and finish in Corona. He takes some weapons he had been making under Ford's tutelage, and goes on a one way trip across dimensions until either he or Ford could make a stable portal.

He basically walks into the castle swinging, right before Rapunzel's group could leave to follow the black rocks. He breaks Varian out of prison, and they go on the run as they come to terms with everything that happened with Varian and what they could do next.

Not quite sure on specifics, but there are lots of tears. Dipper holds nothing against Varian though, because he'd do the same thing if it was for Mabel. All I know for sure it that Dipper is very salty towards the kingdom, and holds that grudge with every interaction he has lol.

Those are the basics of what I have now, it sounds silly as a summary but fleshed out in writing it's much better haha.