How do we know this is to be considered with Ifrit's clue? Maybe Legacy knew we would make the connection with candy and teeth, then automatically assume tooth fairy. Seems too easy for a legacy clue imo.
The gif is from an episode called "The Inconviencing." Here's the overview:
When
Dipper tries to impress
Wendy by acting older than he really is, he's invited to join a group of teenagers on an outing, that leads to
an old abandoned convenience store that may be haunted.
Mabel tags along for the ride but gets sidetracked when she sees
a discontinued line of flavored candies that sends her on an individual, unexpected adventure.
[3]
Haunted abandoned convenience store? Remind anyone of any films?