Reverse Falls

This AU has some or all characters in Gravity Falls turned into their opposite (personality and role-wise). As an example, Dipper acts like Gideon, and Mabel acts like Pacifica.

While some characters just get swapped with other characters, others noticeably change. The character Lazy Susan may turn into Active Susan or Old Man McGucket would become Young Guy McGucket.

List of fan-fictions:

 * Reverse Falls by Carol Molliniere.