Interdimensional Rift (Abandoned/Orphaned)

Aya and Andrew Takanashi, a.k.a Four Pins and Meteor by Snowflake(Rinissa), are a 12 years old, grade schoolers. Aiko and Saki are great friends who helps them when in need. They went on a vacation themselves in Reverse Falls,Oregon..One day, while Aya was exploring, she found a fake, hollow tree, which lead to her suspicion, found a lever where she found a journal, where it kept secrets and mysteries of the town.

Dipper and Mabel Pines, a.k.a Pine Tree and Shooting Star by Bill Cipher, are 12 years old grade schoolers. Wendy and Soos are the most trusted friends who helps them when in need. They went on a vacation themselves in Gravity Falls, Oregon. One day while Dipper was hanging signs for the Mystery Shack, he found a fake, hollow tree which lead to his suspicion, found a lever where he found a journal, where it kept secrets and mysteries of the town.

So, what would happen if the portal in Grunkle Stan's basement, activated and the countdown reached zero(which it did)? The two dimensions would collide,er, meet up, right? It's gonna be awesome, with an extra by the author of the journals will show. The only problem is, Aya and Andrew won't be able to come back to their dimension and the only way to bring them back is to break the rift which Great Uncle Ford is keeping,open the portal again, or Bill will have to summon the reverse Pine twins. The all the options are kinda complicated, though.

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Gravity Falls AU
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Orphaned. You can continue it if you want haha