Gravity Rises (Gravity Falls AU)

Dipper and Mabel Pines were sent to Gravity Rises to "meet distant family" while their parents are on a business trip. What's the worst thing that could happen in such a small and friendly town?

"Gravity Rises is a roleswap alternate universe for Gravity Falls, in which several characters have switched-around personality traits: Mabel swaps with Dipper, becoming the junior paranormal investigator while Dipper becomes the excitable, childish one; Pacifica swaps with Gideon, being the 'child psychic' while Gideon is the spoiled rich kid; Stan swaps with Ford as the one trapped in the portal; Robbie swaps with Wendy and Soos, he swaps with Melody. The whole thing takes place during Winter break."
src: http://gravity-rises-au.wikia.com/wiki/Gravity_Rises_AU_Wikia

This fanfiction is based on @BrightnessWings19 characters while the original creator of this AU was Sorophora/nelauk.