The Mystery Cart's first appearance is in "Tourist Trapped," when it is being driven by Soos while Dipper is narrating on how he and Mabel first came to Gravity Falls, Oregon. Later in the episode, when Dipper believes that Mabel's boyfriend Norman is a zombie, who actually turns out to be gnomes stacked one over the other, he asks Wendy for the keys to the cart so he can save Mabel. After Dipper rescues Mabel, they run to the Mystery Cart and drive away. Soon after, the gnomes begin to chase after Dipper and Mabel. They launch several gnomes at the Mystery Cart, Dipper and Mabel then have no choice to fight off the gnomes one by one. Most notably is when Dipper bashes Shmebulock on the Mystery Cart's horn three times, and when another gnome lands on Dipper's face, Mabel punches the gnome several times to get it to release. After they get the gnomes off of the cart the Giant gnome monster picks up a tree and throws it into the middle of the road, causing the Mystery Cart to slide under the tree, and eventually flip on its side in front of the Mystery Shack.
Later, in "The Time Traveler's Pig," when Dipper and Mabel travel back in time to the events of "Tourist Trapped," the Mystery Cart is seen when they were confronting the giant gnome monster.
It is seen again in "The Deep End," where Mabel drives it several times for her nighttime meetings with Mermando at the Gravity Falls Pool. Later in the episode, she uses it to help Mermando escape the pool, which results in a chase sequence that ends with the golf cart being thrown and landing sideways.
In "Mabel's Guide to Color," Soos is seen driving it.
In "Mabel's Scrapbook: Petting Zoo," Mabel recounts past stories as she flips through her scrapbook. One of the pages has pictures from "Tourist Trapped," including them facing off with the gnomes as they crawled out of the turned over golf cart.
In "The Love God," it is seen behind Stan as he puts a rainbow wig on a gorilla.
In "The Stanchurian Candidate," it is once again seen parked outside the Mystery Shack.
The Mystery Cart bears a resemblance to a real-world golf cart. It has a white paint job, a big red question mark painted between the headlights on the front, red and gold flags hanging from the roof, a small red flag on the back, two brown seats and a salmon-colored roof with a speaker on the front. It occasionally shifts from white to red in different episodes. It also has a bumper sticker on the side.
- 101. "Tourist Trapped"
- 103. "Headhunters"
- 104. "The Hand That Rocks the Mabel"
- 105. "The Inconveniencing"
- 109. "The Time Traveler's Pig" (flashback)
- 110. "Fight Fighters"
- 111. "Little Dipper"
- 114. "Bottomless Pit!"
- 115. "The Deep End"
- 118. "Land Before Swine"
- 119. "Dreamscaperers"
- 10. "Mabel's Guide to Color"
- 12. "Fixin' It with Soos: Golf Cart"
- 17. "Mabel's Scrapbook: Petting Zoo" (pictured)
- 201. "Scary-oke"
- 203. "The Golf War"
- 206. "Little Gift Shop of Horrors"
- 209. "The Love God"
- 214. "The Stanchurian Candidate"
- Postcard Creator
- Mystery Tour Ride
- Attic Stuff Golf
- Mystery Shack Attack
- Rumble's Revenge
- Li'l Gideon Shrinks Back
- Disney Infinity 2.0
- Take Back The Falls (Game)
- The unaired pilot's Mystery Cart has "Mystery Tours" painted on it in red letters.
- In some episodes of the series, the Mystery Cart is parked near the Mystery Shack and shown red instead of white.
- Wendy broke the Mystery Cart when she was doing donuts in the parking lot.
- When seen from a wide shot of the Mystery Shack, the cart is often miscolored.
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