List of allusions/Multiple episodes

Multiple episodes

 * Characters frequently drink "Pitt" cola. Given the similarity in the name and color of the can, this is a reference to Mr. Pibb soda. It was also likely named after Joe Pitt, one of the directors of the series.

Opening

 * When Dipper is exploring the cave, there are characters that look like runes. However, one of them does not match a known rune and the others do not translate into anything intelligible in English.
 * Mabel and Dipper walk past a taxidermy Jackalope in one scene.
 * For one frame, an image of Bigfoot flashes in the same pose as the alleged Bigfoot in the Patterson-Gimlin film.
 * Among the Polaroids are photos of Jackalopes, a Fiji mermaid, flying saucers, and the tabloid character Bat Boy.
 * Bill Cipher is a reference to the Eye of Providence.
 * In the ending, it shows a photo with the logo on it, and if you look on the top right corner, you see 2 flying saucers, and the position is an allusion to the fake photo of two saucers over the Eiffel Tower in Paris.
 * The Konami Code is also visible.
 * A statue of Paul Bunyan appears in the first few seconds of the theme song. The most famous Paul Bunyan statue is in Portland, Oregon.
 * In the animatic version of the theme song, Mabel and Dipper arrive on a "Fast Dog" bus. This is an allusion to Greyhound Lines buses.
 * In the released version, it has changed to "Speedy Beaver." It may still be an allusion to the Greyhound Lines buses, though.