See You Earlier!

Dipper found a magical stream that turns people into monsters. Everyone but him and his great uncles are human again. Dipper is determined to find a way to reverse this curse... by going back in time. Both Dipper and Mabel are thrown back to different sides of the continental United States. In order to go back home, they must find each other and fix the broken time tape. Luckily, they find their great uncle... only his hair isn't gray... and he has a mullet.

Set in both Monsterfalls and Timestuck, though this fic explores the Timestuck plot rather than the Monsterfalls plot. (Graphic depictions of violence in chapter one, but tapers off)