Once upon a swine

At the moment when Mabel wins Waddles the pig at the Mystery Fair, Dipper ruins his chance to impress Wendy. But when Dipper finds a way to travel back in time and changes his fate with Wendy, Mab ...

At the moment when Mabel wins Waddles the pig at the Mystery Fair, Dipper ruins his chance to impress Wendy. But when Dipper finds a way to travel back in time and changes his fate with Wendy, Mabel's fate also changes--for the worse. Then, when a prehistoric creature snatches up Waddles, it's up to the Gravity Falls gang to save him!
"Based on the series created by Alex Hirsch."
"Part one is based on the episode "The Time Traveller's Pig," written by Aury Wallington, Alex Hirsch."
"Part two is based on the episode "Land Before Swine," written by Tim McKeon, Alex Hirsch."
"Disney XD"--Title page.
Based on the television program Gravity Falls.