[Dipper, Mabel and Soos walk up to the Gravity Falls Palace of Pranks.]
Mabel: Well, guys, here it is, the Gravity Falls Palace of Pranks, the greatest novelty shop in Gravity Falls. All the greatest pranksters shop here. This is where I got my gag... [the scene shows a close up of the can of Peanut Brittle.] peanut brittle can.
Soos: Oh, boy, Peanut Brittle. Gimmie! [Soos tries to open the can.]
Mabel: Soos, wait, it's a booby trap, remember?
Soos: Nice try, dude, but it's not gonna work this time. I'm gonna have some of your delicious Seanut Brittle! [opens the can and purple tubes pop out of the can] Where's the Seanut Brittle?
Mabel: [Dipper and Mabel laughs] That gets funnier every time you say it, Soos. Come on, let's go inside. [Dipper and Mabel walks off screen.]
Soos: [starting to cry] Peanut Brittle? [Dipper and Mabel enters the Gravity Falls Palace of Pranks and smells the air.]
Mabel: Ah! [Soos enters the scene] Nothing compares to the smell of cheap plastic novelty items. [an aisle is shown] Pranks, gags, and gross-out toys as far as the eye can see! [walks down an aisle] Isn't it everything I said it would be, Soos?
Soos: [in another aisle] Hey, Peanut Brittle! [purple tubes appear popping above the aisle that Soos is in] Oh, darn it, not again! [The scene only shows Dipper and Mabel in his aisle. Dipper and Mabel laughs. An old man named Frank enters the scene.]
Frank: Good to see you, Mabel. How's my number one customer doing?
Mabel: Great, Frank. This is my twin brother Dipper, and my friend Soos. They wants to become a prankster, too.
Frank: [walks up to Dipper] Well, pleasure to meet you, Dipper. [shakes Dipper's hand, but Frank has a joy buzzer, so it shocks Dipper. Dipper screams and sucks on his hand. Frank laughs] That's your first lesson, son, the granddaddy of all pranks. The joy buzzer. The prank is for the enjoyment of the prankster.
Mabel: You see, guys, Frank here is the master. I learned all I know about pranks from him. [Mabel, Dipper and Soos walk to the checkout counter and Frank is behind it]Okay, Frank, let's see what you've got.
Frank: Well, this came in just this morning. [shows a package of gum] Have some gum.
Soos: Thank dude.
[Soos chews the gum but then he screams as his head explodes] Ha! Exploding chewing gum. Only $9.95.
Soos: [his head is gone, leaving a neck bone in the shape of a femur and he talks muffled] I don't get it.
Mabel: [takes out a dollar] What can we get for one dollar?
Frank: One dollar will get you this fake gag dollar- [takes out a fake dollar] fool your friends into thinking you've got a real dollar.
Dipper: It could work on Grunkle Stan.
Mabel: What else have you got? [Frank holds up a whoopee cushion.]
Frank: A whoopee cushion.
Mabel: Nah. [Frank holds up fake vomit.]
Frank: Fake vomit.
Mabel: No. [Part of the counter is covered in real vomit.]
Frank: Real vomit?
Mabel: Eugghh. Don't you have anything good?
Frank: Well, there is one prank that I've been saving for a real top of the line prankster. [shows close up of a spray can] Invisible Spray!
Mabel: Wow, invisible spray!
Soos: But I can see it.
Mabel: Gee, Soos, just think of the pranks we could pull with this. [Mabel purchases the Invisible Spray.]
Frank: Good choice. Now be careful with that stuff, guys. It stains clothes.
Mabel: Thanks, Frank. [she Dipper and Soos walk off-screen. The scene changes to show Dipper,Mabel and Soos outside] Here it is, Soos. The ultimate prank- invisible spray.
Soos: What are we gonna do with it?
Dipper: You could spayed on Grunkle Stan chair.
Mabel: I know! We'll go spray the park bench and then sit on it, and when people walk by, we'll be floating in midair. [They both think about sitting on an invisible bench, surrounded by Hank, Tyler, Hank wife, Toby,
Pizza Guy, and Rosanna.]
Hank: They're floating in midair!
Hank wife: How do they do that? [The thought bubble disappears.]
Soos: That's the ultimate prank! Good idea, Mabel! [Soos gives Mabel a thumbs up.]
Mabel: Well, let's get started. [Soos takes off his shorts and shirt.]
Soos: Okay, I'm ready. [Soos drops his pants on the ground.]
Dipper: Any particular reason you took your pants off?
Soos: Well, that stuff stains clothes, right?
Mabel: That it does, Soos, that it does. Good thinking. Here, hold this a second. [Soos takes the can of spray while Mabel takes off her skirts, her sweater and her T shirt. Soos hugs the can]
Dipper: Mabel you sure, your spay the park bench without any clothes on?
Mabel: Come on Dipper it's say it's stains clothes so come out no one looking!
Dipper: (groans) Alright! (Dipper take off his vest, shirt, and short.)
Mabel:Okay, Soos, give me the can.
Soos: I think since spraying the park bench was my idea, I should get to spray it.
Mabel: Soos, spraying the park bench was my idea.
Soos: Yeah, but I said it was a good idea!
Mabel: Give me that thing. [Mabel grabs the can and she Dipper and Soos wrestle over it. Mabel accidentally sprays their clothes and they disappear]
Soos: Hey, the invisible spray works! [A tour bus drives up.]
Bus driver: And on your right, if you look, you'll see two kids and some kind of gopher in their underwear fighting over a can of paint! [The passengers and the bus driver laugh. The bus drives off. Dipper covers his lower half.]
Dipper: Oh my gosh, guys, help me find our clothes! [Mabel pats the ground, trying to grab the clothes. Mabel sprays Dipper right hand and it disappears.]
Mabel: I gotta hand it to you, Dipper. You look kinda funny. [Mabel and Soos laughs and Dipper screams.]
Dipper: Righty, where are you? [Mabel and Soos laughs again] No one messes with Righty! [takes the spray can with his invisible hand] We'll see how you like it! [sprays Mabel making a hole in the middle of her body] Kind of gives you an empty feeling, huh? [Mabel screams.]
Mabel: I can have a summer romance looking like that!
[Mabel takes the can.sprays Dippers forehead] I can't see your birthmark.(laugh)
Soos: Ha,Ha, good one dude.
[Dipper takes the spray can and sprays Soos's lower half.]
Dipper: No guts, no glory! [Several bad puns later... Dipper, Mabel and Soos, who are now invisible. Soos shakes the can.]
Soos: Oh, hey, I think this thing is empty! [Mabel grabs the can and shakes it.]
Mabel: Oh, no, it can't be! How are we going to pull off the ultimate prank? [Dipper grabs the can and shakes it.]
Dipper: Aw man I can't believe, we waist our time with the Invisible Spray. Thanks a lot, Guys, you used the last of it! [Dipper throws the can far away.]
Soos: Hey, I think I found our pants . [a ripping noise is heard] Oops! Here, these are yours.
Dipper: Oh, forget the pants, Soos. Let's get back to the shack and wash this paint off. [Dipper,Mabel and Soos walk off somewhere.]
Mabel: Hey, Dipper, do you know what time it is?
Dipper: Oh sure, it's... half past invisible.
Soos: Gee, it's getting late. [They walk up behind Reginald.]
Dipper: Let's ask this guy. Excuse me, sir, but do you have the time?
Reginald: Sure. [looks at his watch] It's, uh, ten to three.
Dipper: Thank you.
Reginald: Don't mention it. [Reginald turns around to notice there is seemingly no one there.]
Soos: Don't mention what?
Reginald: Uh, who said that?
Soos: Me.
Reginald: [screams] Ghosts! [ Reginald runs away from them; his eyes pop out. His eyes scream, jump into a car and drive away.]
Soos: Hey, I'm no ghost! Well, the nerve of that guy and his driving eyeballs.
Mabel: Wait a second, guys, my brain just hatched an idea.
Soos: Lay it on me hambone.
Mabel: Okay, we're invisible, right?
Dipper: Right.
Soos: Yeah.
Mabel: If that guy thought we were ghosts, we could haunt everybody in Gravity Falls. Oh, it's the ultimate prank.
Dipper,Mabel and Soos: Whoo! High five! [They give each other a high five.]
Mabel: Let's go scare us some suckers! [The scene changes to show the Corduroy cabin. The scene then shows Wendy reading her book in her room. She hears a noise, which is Dipper,Mabel and Soos's laughter. She checks to see what it is, but there is supposedly nothing there. She gets up and goes to her window.]
Wendy: Huh? [the outside of her house is shown] Well, that's funny, I thought I heard voices. Huh? [walks up to a glass of juice on the floor] I thought I left that glass of Apple juice on the table. [walks over to a table with a lamp covered in garbage] And didn't Dad toss that old lamp out yesterday? And since when did I acquire all these portraits of Soos?! [Photos of Soos are on the walls and tables, and the rug has his face on it. Wendy turns around and sees Dipper,Mabel and Soos covered in white sheets over their heads as they wail.]
Dipper,Mabel and Soos: We're ghosts. [Dipper,Mabel and Soos wail again. Wendy laughs.]
Wendy: I knew it was you guys! Alright, joke's over. Take off the sheets. [pulls off the sheets and notices there is nothing there, then gasps] It is ghosts! [Wendy screams. She running to the basement and locked the door.. Dipper,Mabel and Soos leave Wendy's house, laughing.]
Mabel: Boy, we really scared her! [Dipper,Mabel and Soos laugh.]
Dipper: Yeah, is like we in Dusk 2 Dawn again.
Soos: Who's gonna be our next victim?
Mabel: A better question would be, "Who isn't?" [The scene changes to show greasy's diner, where she is preparing to give the customer a piece of cake.]
Lazy Susan: Here you are sir Double-dark chocolate deep-sea light diet cake. [Soos and eat(s) the cake, making it look like ghosts have eaten it. Soos's face is covered in cake. He belches loudly and wipes it off] Oh!
[The customers,and Lazy Susan run away in the diner screaming ] Ghosts! [. The scene changes to show Robbie playing his guitar at his house. Dipper,Mabel and/or Soos takes his guitar(s),making it look like it is floating in mid air.] Robbie: Huh? [Dipper,Mabel and/or Soos playing his guitar so loud a Robbie's cover his ear. The three wail ghostly. Robbie crashes through the wall and runs away.]
Robbie: Ghosts!
[The scene changes to show Bud cleaning his car at his dealership then Dipper,Mabel,or Soos honking . at Bud, making it look like a Car diving by itself.]
Dipper,Mabel and Soos: [speaking in ghostly voices] Need a ride!
Bud: Ghosts! [Bud screams and run away.
Charlie's mother appears waving her arms wildly.]
Charlie's mother: Ghosts!
[Old Man McGucket appears with his eyes bugging out of his head.] Old Man McGucket: Ghosts! [Pop Pop appears, scared with arms on his head.]
Pop Pop: Ghosts! [Summerween Superstore worker appears in a sort of screaming position.]
Summerween Superstore worker: Ghosts! [Tyler appears holding a piece of toast.]
Tyler: Toast. [Toby appears sitting on the toilet, appearing freaked out.]
Toby: Ghosts! [Dipper,Mabel and Soos are reading newspapers. Mabel laughs.]
Mabel: It's official: we're the greatest pranksters ever. The whole town thinks we're ghosts. [Soos is holding his newspaper upside down.]
Soos: Yeah.
Dipper: Is like, nobody believe of Supernatural now they believe it real.
Mabel: There's only one guy left to scare, and we'll have pranked everybody in Gravity Falls- [an article is shown it reads, "Pines Last To Be Haunted! says, 'I ain't afraid of no ghosts'"] Grunkle Stan. [The same article is shown on Soos's paper, but it is upside down.]
Soos: It says he isn't scared of ghosts. [Mabel is "shown"]
Mabel: We'll see about that!
Dipper: Who believe of the supernatural now Grunkle Stan!
[The scene changes to show the Mystery Shack at night. Stan peers out of the blinds.]
Stan: Ghosts? Ha! I ain't afraid of no ghosts! Every man knows a ghost won't come near a fella as long as he's wearing his spotted neckerchief, [grabs a handkerchief] and his dried-up leprechaun, [shows ashes of the leprechaun]and a bit of gold never hurt. [shows a gold necklace around Stan neck that reads, "Foxy"] But to be on the safe side, I'm also wearing my pants in a maldon knot. Got me shiverin' timber brace, [shows his ankles chained together] and the hairs on the back of my neck are taped down. [a strip of duct tape covers the hair. Stan is shown wearing a barrel and a headpiece with lanterns hung on it] And I'm all wrapped up in a suit of anti-ghost armor. And if none of this stuff works, I've got me secret weapon—the specter deflector! [holds up a paddle ball] So just try and get me, you ghosts! Bring it on. [The lights black turn off. Dipper,Mabel and Soos wail ghostly.]
Dipper,Mabel and Soos: [as they open the front door] Stan!
Stan: Wha? [Dipper,Mabel and Soos toss over some merchandise. They pick up a Stan Bobbleheads,Beavercorn and an Aliens in a jar to make it look like they are floating.]
Mabel: Stan, we've come to haunt you. [Stan uses the specter detector (paddle ball) by bouncing the stringed ball back and forth from the paddle board.]
Stan: Stay back, I'm well-armed! [Dipper,Mabel and Soos moan ghostly. Dipper,Mabel and Soos walk by with a Beavercorn, making it look like it is floating by. Stan hits the ball faster.]
Stan: I'm warning ya! [Dipper, Mabel and Soos moan. Dipper, Mabel or Soos stops the ball. Dipper,Mabel or Soos then cuts the string.]
Stan: [shivering] Ooh!
Dipper,Mabel and Soos: [quietly] Boo. [Stan breaks out of his armor and screams in horror.]
Stan: I gotta get out of here! [He runs to the doors, but they don't open.]
Dipper: You can't escape, Stan, we've glued the doors shut! [The door is held closed with a long strip of glue.]
Stan: [off-screen] You'll never get me! [Stan tries to break through the window, but instead of shattering, the window stretches like elastic and slingshots him backwards, and he crashes into a table.]
Soos: Nice try, Stan, but we replaced all the glass with rubber! [Stan dives into the toilet, but gets stuck. He pulls himself out and sits on the floor, dazed.]
Mabel: Too late, Stan, we've already clogged all the toilets! [the toilet is stuffed with toilet paper. Stan cowers in a corner in his office]
Stan: Please, spirits, leave me be. [Soos laughs.]
Soos: [while Stan is incoherently begging for his life] We got him good, Dude.
Mabel: [while Stan is incoherently begging for his life] Wait, guys, I've got one more idea. [to Stan] You're going to pay, Stan.
Stan: [shaking with fear] No, spirits, please!
Mabel: Pay! [A dollar floats in the air.]
Stan: No!
Mabel: [high-pitched] Pay! [lights a match]
Stan: No! Don't burn my dollar! [grabs a bucket of water and throws it at the dollar. The water drips on Dipper, Mabel and Soos, making them reappear. They laugh, not noticing they're visible] Well, well, well, if it isn't Dipper, Mabel and Soos.
Mabel: [wiggling her arms and legs like a ghost] I know not these names of which you speak. [Dipper and Soos looks down and notices that he is visible.]
Soos: Uh, Mabel.
Dipper: Mabel, we're visible again. [Mabel looks down, then she Dipper and Soos scream and cover their lower halves Stan lifts them up by the back of their necks as they try to run]
Stan: So you three are the Gravity Falls ghosts.
Mabel: We're really sorry, Grunkle Stan. Please don't chop us into little pieces.
Dipper: Yeah, Grunkle Stan it's was just a prank.
[Stan puts them down.]
Stan: Hey, come on, guys, I'm hip! I pulled my share of pranks when I was your age. Had me some laughs. That's what we did tonight, right? We had a good laugh. Come on, laugh with me. [they all laugh] Uh, any particular reason you guys are in your underwear?
Mabel: Yeah, the invisible paint stains clothes. [Stan laughs.]
Stan: Of course it does. Well, you two better hurry go to bed and Soos go on home before someone sees ya undie.
Mabel: Yeah, I think I'd die of embarrassment if that happened.
Soos: Me too.
Dipper: me three.
Stan: Woo, now we wouldn't want that, would we? It's getting late now. You three pranksters better get going.
Mabel: Grunkle Stan, thanks for being such a good sport.
Stan: [off-screen] Don't mention it. [Dipper,Mabel and Soos walk into the gift shop.]
Dipper: That Grunkle Stan, always looking out for me. What a guy.
Soos: Yeah. [A white, round light shines on Dipper and Soos. The scene pans out to show a crowd of people.]
Stan: The Mystery Shack... live underwear pranksters! [he is shown shining the light on them from the crow's nest] Starring the Gravity Falls Ghosts. [all of the tourists of Gravity falls are shown cheering. Dipper and Soos scream while trying to cover themselves up. except Mabel already put her clothes on already waving to the crowd.)
Dipper: Mabel how, did you put your clothes on so fast?
Mabel: Well I know, Grunkle Stan is gonna prank your back so he put my clothes on the floor and I get dress quick before Grunkle Stan prank you back.
Dipper: You didn't get my clothes for me!
Mabel: Well you could think of that before you prank Stan!
(Stan laughs teasingly. Wendy whistles at them as Tambry takes a picture. Robbie laughs. Dipper and Soos keep trying to cover themselves.]
Dipper: Soos!
Soos: Yeah?
Dipper: [the scene cuts to the outside of the Mystery Shack] We should have bought the whoopee cushion! [Dipper lets out a crying yell as the story ends. A person wolf whistles in cheers.]
Author note: Mabel only wear her Star Swimsuit instead of her underwear in this story.