When Stan throws a big weekend party to promote the Mystery Shack, Dipper uses an off-kilter copy machine to make clones of himself so he can impress Wendy. Meanwhile, Mabel stands up for her two new friends and fights for the Party Queen title in their honor, instead of having the popular girl and her group win.
This episode begins with Stan, Soos, and Wendy setting up for a party at the Mystery Shack (as a means of raking in money). Dipper and Mabel pretend to barf on each other using silly string, and Wendy eventually joins in. Stan tells them to stop wasting the party supplies, takes the silly string away, and then, tells Dipper and Mabel to make copies of the flyers for the party. They decided to head towards the copier store, but Stan tells them to save trouble by using the copier machine that he had somewhat repaired. While Dipper and Mabel attempt to figure out how the copier works, they discover that the copier machine can reanimate copied human bodies and body parts back to life (but the copies can be disintegrated with any liquid, but in the episode they were only disintegrated by water and soda).
After making copies of the flyers, Stan tells Wendy and Mabel to work the ticket stand; but Dipper volunteers to take Mabel's place because Mabel wants to attend the party to make new friends. Dipper promises Stan that he will not leave the stand. As Dipper puts on a bow tie in his room (the uniform for working at the ticket stand), Mabel teases him for liking Wendy. Due to the taunting, Dipper reveals his complicated, step-by-step list to woo Wendy. He says the last step is to ask her to dance with him. Dipper daydreams that he and Wendy will dance on a classy dance floor with Soos in the background playing a trombone. Mabel says he is making the situation over-complicated, but Dipper simply ignores her. Afterwards at the ticket stand, Dipper awkwardly tries to make conversation with Wendy, which he fails to accomplish.Meanwhile at the party, Mabel meets Grenda and Candy Chiu, who she befriends quickly. Soos (serving as the DJ for the party) makes a competition that whoever parties the hardest will win a crown. Mabel competes against Pacifica Northwest, the meanest, most popular girl in Gravity Falls, to stick up for her new friends.
Meanwhile, Wendy joins the party (which is getting hyped up) and leaves Dipper alone. Unable to ditch the ticket stand due to his promise to Stan, he decides to use the copier machine to create a Dipper clone, who names himself Tyrone. They decide that Tyrone will manage the ticket stand, while Dipper hangs out with Wendy. Unfortunately, Robbie is there with Wendy. Dipper and Tyrone plan to create two more copies to take Robbie's bike so he'll run after it and leave Wendy with Dipper.
As a slow song plays, Dipper is urged by Mabel in asking Wendy to dance. Dipper panics, and as a result, he covers Mabel's mouth so she doesn't tell Wendy what she would have said. Upstairs, he and Tyrone decided that there are too many variables. Due to all the things that can go wrong, he makes more clones, including a faulty "paper-jam" Dipper. As everything is prepared, Dipper runs into Wendy waiting for the bathroom and talk like "normal people" where they reveal some secrets such as Wendy looking like a dork and Dipper's birthmark. Once Wendy can use the bathroom, all the Dipper clones assault the real Dipper for not obeying the list and lock him in a closet, but he escapes and it eventually leads to a big clone fight.Dipper eventually melts them all, except for Tyrone. They both see Wendy with Robbie, stop fighting, realize they ruined it and went up to the roof to have a soda. At the party, (by scaring and bribing the other guests), Pacifica wins the crown, then Mabel apologizes to her new friends that she didn't win and says she understands if they would rather go with Pacifica and the rest of the party to Pacifica's boat. Even still, they accept her, and plan to have a sleepover and they dance more, even though everybody else left.
On the roof, Dipper and Tyrone talk about their chances with Wendy and realize things went more smoothly without a plan. After drinking their sodas, Tyrone melts from the inside, and tells Dipper to remember what they talked about. Dipper then tears up the list and goes to dance with the crew in the Mystery Shack. Upon Dipper's arrival in the Mystery Shack, Mabel yells for Dipper to come meet her friends.
During the end credits, it shows Soos playing every key on his keyboard one at a time. Each one makes a different strange sound such as a doorbell ringing, baby crying, the "yeah-yeah," or something equally strange. When he hits the last one, lightning sounds, the lightning being the one that he meant to push at the very beginning, and Soos then smiles when finds the sound effect he was looking for.
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- Dipper has a birthmark on his forehead the shape of the constellation Big Dipper.
- Wendy thus reveals it's the reason for his nickname, and "Dipper" is not his birth name.
- Dipper always wanted to be named Tyrone.
- Wendy is 15 years old.
- Wendy wore braces when she was younger.
- Soos' keyboard with the "Yeah!" sound effect makes its second appearance since "Headhunters."
- Wendy mentions the events at the convenience store from "The Inconveniencing."
- Dipper and Tyrone sit at Wendy's hiding spot on the roof from "The Inconveniencing."
- Viewership: This episode was watched by 4.176 million viewers on its premier night.
- Clones 3 and 4 did not return after they rode off with Robbie's bicycle.
- The three differences between Dipper and his clones include the lack of logo on Dipper's hat, the bow tie he wears for the party, and the clones are more pale in color than Dipper.
- Scott Menville isn't credited for voicing Nate in this episode.
- In the Disney Asia release of this episode, Mabel's line "That's a dumb idea for poop-heads," is cut making Dipper have one continuous dialogue.
- Dipper's "Wendy Plan"
- Step 1: Smile
- Step 2: Wear clean pants
- Step 3: Compliment her looks
- Step 4: Laugh at her jokes
- Step 5: Be nice
- Step 6: Block Robbie
- Step 7: Wear fitted clothing
- Step 8: Wear a tie
- Step 9: Talk to her like a normal person
- Step 10: Describe how she smells
- Step 11: Make her laugh
- Step 12: Agree with everything she says
- Step 13: Pretend you're fun
- Step 14: Pretend you're confident
- Step 15: Mop up sweat (in private)
- Step 16: Lose "burrito smell"
- Step 17: Pretend to read smart books
- Step 18: Use deodorant everywhere
- Step 19: Display monstermon knowledge
- Step 20: Do not display monstermon knowledge
- In the Gravity Falls Main Title Theme for episodes 1-6 if played backwards, reveals a message in the end: "Three letters back." In "Double Dipper" and following episodes, the message says "switch A and Z," which is how you solve the Atbash cipher, the new method to solving the cryptograms during the end credits.
- In the promo, when a clone popped up from paper, the animators appear to use screen tone, which is often used in manga.
- The cryptogram in this episode says "KZKVI QZN WRKKVI HZBH: "ZFFTSDCJSTZWHZWFS!"" Which, when translated using the Atbash Code says, "PAPER JAM DIPPER SAYS: "AUUGHWXQHGADSADUH!""
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