List of goofs/Season 2

Scary-oke

 * The numbers reflected on Stan's face while he is turning on the portal are not mirrored.
 * Agents Powers and Trigger switch seats during the scene where they locate the source of the "readings."
 * When Wendy enters the shack at the announcement of the after-party, she is wearing her name tag. However, when she is leaving with the crowd, her name tag is not seen.
 * When Dipper and Mabel are in the attic, the rind on Mabel's sweater disappears, and when Mabel is claiming that there is nothing left to discover about the Journal, there are only watermelon seeds on the neck and sleeves of her sweater; the front of the sweater is completely missing the watermelon seeds.
 * Grenda smashes the Stañatas and the mess is all over the floor; however, it disappears in the shot where Candy, Grenda and Mabel are dancing.
 * When Lee, Nate, Tambry, and Thompson arrive at the party, Lee is wearing a sleeveless shirt. In the next shot, it has short sleeves.  When all four are seen dancing, he is sleeveless again.
 * In the shot of the teens dancing, Tambry is wearing her regular day wear instead of the party outfit shown earlier.
 * Lazy Susan's lipstick is missing when she enters the Mystery Shack during the party. Later, her lipstick reappears during the scene when the zombies emerge from the ground, but disappears again in the next shot.
 * In the journal, the incantation's second line reads "Diablo Dominium," but Dipper reads it as "Diablo Dominus."
 * The karaoke machine changes places, and even disappears, many times when the zombies are starting to attack the shack.
 * There are some colored lights hanging around the Mystery Shack in a shot behind Soos when he starts approaching the twins with the zombies. The lights are not present in any of the other shots.
 * In the shot where Dipper and Mabel are backing away from the zombies, the flower in Mabel's hair disappears, then reappears in the next scene.
 * The symbol on Stan Pines' desk in the Underground laboratory is different than it was in "Gideon Rises."
 * When Stan sees himself in the reflection of Journal 1's hand, the reflection is not reversed.
 * During "Taking Over Midnight," when the three are singing "We're queens of the disco!", Dipper steps up, followed by Mabel and then Stan, but when the camera zooms out, the order changes to Dipper, Stan, and then Mabel.
 * After singing "Taking Over Midnight," Stan's fez appears while yelling "Deal with it, zombie idiots!" It then disappears again in the next shot.
 * At the end of "Taking Over Midnight", when a zombie tries to attack Dipper, all of the microphones are suddenly gone.
 * Stan activated the Universe portal in "Gideon Rises" by pushing the lever in front of it to the left. But during a full shot of the portal room at the beginning of this episode, the lever is seen facing the right.

Into the Bunker

 * Wendy briefly has two left arms when she reaches for some popcorn.
 * In the same scene, in one frame, Dipper's mouth is completely displaced from his face.
 * When Wendy first notices the map of Gravity Falls that covers the tunnel entrance, the map is only about a square foot in area. In the next shot, the map is at least twice that size.
 * In the scene in which Dipper is going to find another way out of the bunker, he grabs Wendy's right hand. In the following shot, he is holding her left hand.
 * When the Shape Shifter drops Journal 3, Dipper walks up to the Journal and picks it up. In one frame, the Journal lifts itself closer into Dipper's hands without Dipper touching it yet.
 * When Wendy tears off one of her jacket's sleeves, she tears off at least a foot of cloth. When she puts her jacket back on at the end of the episode, the torn sleeve is only a few centimeters shorter than the untorn one.
 * At the end of the episode, Dipper and Mabel are sitting in the middle of the log, but when Soos sits down, they are suddenly on the far right of the log.

The Golf War

 * After Soos draws the w-neck, the marker he used disappears from his hand.
 * In one frame, when Dipper is trying to hit the ball, his mouth disappears.
 * When Mabel runs over to the end of the eighteenth hole to see if her ball went in, she does not have her putter with her. In the next shot, she suddenly has her putter, which she angrily throws down. The putter disappears again in the next shot, only to reappear when Pacifica approaches the Pines.
 * When Pacifica insults the Pines family, Dipper does not have a putter, but in the next shot, he is leaning on a putter.
 * When the golf course manager announces that the course is closed, one of the wings on the golf cart he is driving passes through a pole.
 * Dipper does not have a golf club with him during the scene where Mabel is practicing the eighteenth hole, but suddenly has one after he notices a noise inside the windmill.
 * When Dipper first hears noise coming from inside the windmill, the wood covering has a design on it. When he approaches with Mabel to tear it off, the design is gone.
 * When Dipper takes off the panel of the windmill, he's to the left of Mabel. In the next shot, he is to the right of her.
 * The map of the course is not an accurate representation. For example, the windmill and the pirate ship are close together, but in the map they are widely separated.
 * When Pacifica and Sergei enter the course at night, the part in Mabel's hair is on her left, but changes to the right in the next shot, then changes back the left in the shot after that.
 * When Dipper, Mabel and Pacifica have escaped the Lilliputtians and the golf cart collapses outside of the golf course, one of its wings is undamaged. However, in the next shot, both wings are torn off.
 * When Mabel is apologizing to Pacifica, in one frame, her braces are visible over her mouth when it is closed.

Sock Opera

 * When Mabel is playing the keyboard in the scene where Dipper, Mabel, Soos and Wendy are making puppets, the bottom half of her leg is cut off.
 * After Bill tells Dipper he's been keeping an eye on him, Dipper's eyebrows and eyes continuously appear and disappear.
 * Before Bill forms the screaming head, his hand is cut off for one frame.
 * When Gabe visits the Mystery Shack, Mabel's braces disappear when she laughs nervously.
 * In the scene in the attic where Bill offers to unlock the laptop, the password bar on the laptop disappears for a shot, then reappears in the next shot.
 * While Bill is speaking to Soos outside the Mystery Shack, Bill's eyes disappear in one frame.
 * In the theater, Wendy and Bill are sitting in the same seat at first, with exactly one free seat to their right. In the next shot, they are sitting in two separate seats and there is still a free seat to their right.
 * When Gabe meets Mabel in her dressing room, he is carrying some flowers. In the next shot, he has his puppets on both of his hands and the flowers are nowhere to be seen.

Soos and the Real Girl

 * When Soos is playing "First Person Puncher," the whole shot is pixelated for a few frames.
 * When dyeing Abuelita's hair, the foil is originally silver, but when she walks away it is bright orange.
 * The unnamed man in red appears in the mall once in one area and then another place in a fraction of a second.
 * When the door to Hoo-Ha Owl's Pizzamatronic Jamboree closes, it is covered in pits before it is hit by any skee-balls.
 * When Soos runs into the gaming store, the box he finds Romance Academy 7 in isn't visible.
 * The note on the back of Romance Academy 7 disappears for a shot, then reappears in the next shot.
 * When Mabel suggests Soos see some real girls, there are cans of Pitt Cola on the floor that weren't there in the previous shots.
 * During the scene where Mabel and Dipper drag Soos away from his room, Mabel's cheeks have outlines on them for two frames that flicker back and fourth.
 * The "HE's GOT ATTI-CUBE!" poster in the door of Soos' room shows a prominent COOLCUBE logo in the upper right corner. When Soos takes the Romance Academy 7 disc and leaves for his date with Melody, the COOLCUBE logo is missing.
 * When Soos is talking to Melody for the first time, despite the fact that she's in the foreground in one shot, Soos's arm moves over her hair.
 * In the scene where Soos and the others are hiding behind the toppled arcade cabinet, the character peeking over the fortress wall on the side of the cabinet changes from a peach color to red in one short scene.
 * In Hoo-Ha Owl's Pizzamatronic Jamboree, the graphics for Star Battle appear on the unit for First-Person Puncher.

Little Gift Shop of Horrors

 * While Stan is attempting to get the traveler to come into the Mystery Shack, his mouth overlaps his nose for a frame.
 * When Stan is attempting to get the traveler come inside, his mouth disappears for one frame.
 * When the Pines first approach the Hand Witch's table, the stall in the background says "Lots O Pots." Later, it changes to "Pots Aplenty."
 * When Stan mocks Dipper's concern about a curse, the stalls in the background change. Instead of Lazy Susan and Old Man McGucket's stalls, Pots Aplenty and Cheep Cheep Tires appear. Additionally, they are transposed (Pots Aplenty is on the right of Cheep Cheep Tires next to the witch's stand).
 * When Waddles shows Dipper and Mabel the What-the-heck-ahedron, the computer and cup of coffee he knocked over a few shots earlier are gone.
 * When Waddles shows Mabel the Smarticle Accelerator, the ladder Dipper was standing on is gone, and Dipper is standing in mid-air. In the next shot, he is suddenly on the ground, and the ladder has reappeared.
 * In the shot where Waddles starts the Smarticle Accelerator, Dipper's pose changes from standing straight to having his hands in his pockets without any animation.

Society of the Blind Eye

 * McGucket appears out of nowhere when Susan shooes him out from under the table.
 * Lazy Susan's purse strap turns from purple to yellow when she sees the gnomes taking her pie.
 * The picture of McGucket becomes much larger when Dipper places it over the silhouette with the question mark.
 * The stain on Lazy Susan's apron switches from her left to her right in the scene where her memory is erased.
 * When Mabel grabs the memory erasing gun, the bottom of the red glass section vanishes.
 * Robbie's memory tube disappears from the insertion slot in the shot after Dipper puts it in.
 * When McGucket spots the tube with his memories, the label is on the side facing towards him. When he grabs it, the label is on the opposite side of the tube. It is later shown that the tube is only labeled on one side.
 * In the shot where Mabel is entering "SUMMER ROMANCE" into the memory gun, her hand is not turning the dial.
 * All of the members of the Society of the Blind Eye are the same height until they reveal who they are.
 * Blind Ivan has a large section of his forehead labeled "KNOWLEDGE." However, whenever he is seen from from afar, this part of his forehead is divided into smaller sections.
 * When Dipper and Mabel confess to each other while tied to the pillar, they move their arms around despite their arms being tied down.
 * When McGucket walks towards Blind Ivan, his arm goes through his hat multiple times.

Blendin's Game

 * The candy that Soos takes out of the vending machine is not seen in the machine.
 * In the first shot of Soos' driver's license, his signature has three stars above it and a lightning bolt to the right. In the next shot, there is only one star and the lightning bolt is to the left of the signature.
 * The bandage on Stan's hand is missing in every shot except for when he enters the front yard at Soos' birthday party.
 * In the first wide shot of Mr. Zzz's Mattresses, the man at the far right of the shot has two left arms.
 * When Dipper and Mabel hide under a mattress, the Tape measure time machine is missing. It suddenly appears next to the mattress after Lolph and Dundgren leave.
 * When at the Heart-A-Tap Dance Studio, Toby Determined's reflection in the mirror shows him much closer to the wall than he actually is. In addition, his mouth is misplaced and the railing in front of him is not reflected.
 * When Abuelita has a plate of cookies, they are shaped like dinosaurs. Later, when Soos has the cookies in his room, they are shaped like circles.
 * When the twins and Blendin are taunting each other just before beginning Globnar, Lolph is at first on Blendin's right and Dundgren is on his left. In the next shot, they have switched places. They switch to their original positions in the following shot.
 * In the images of Blendin chasing the twins on a giant clock and of the wheel barrow race, Mabel is missing her braces.
 * When Time Baby asks Dipper and Mabel to choose Blendin's fate, Blendin suddenly has handcuffs on, which were not present in the previous shot.

The Love God

 * When Dipper, Mabel and the teens find Robbie in the grave, the pine tree on Dipper's hat is missing in the bird's eye shot.
 * When Stan is sewing the rainbow wig onto the taxidermy gorilla, the can of Pitt cola is gray. It turns pink in the next shot.
 * In the shot where Stan is aiming his crossbow, the bandage on his hand is colored black.
 * When Stan grabs his crossbow and aims it at the hot air balloons there are other weapons in his toolbox. But when he talks to Soos, the toolbox is empty.
 * The picture of Robbie as a little kid is different from how he was shown in "Blendin's Game."
 * When the teens are congratulating Dipper for thinking of taping snacks to Thompson, Wendy says "Well done!" without moving her mouth.
 * When the teens are in Thompson's garage, Dipper, Tambry and Wendy are sitting on boxes arranged in a semicircle. When Lee picks up Dipper, the boxes are in a straight line. They then shift back to their previous positions in the next shot.
 * When Tambry sits down in the booth at the diner, she puts her purse on the ground next to her, but in the next shot, it is gone.
 * When the Love God enters the diner, there are a few frames where he has two chins.
 * When Tambry eats the love potion, her hair is pointed to her left instead of the usual right.
 * When Robbie and Tambry leave Greasy's Diner, Robbie's black belt turns blue.
 * When Mabel shows the teens her happiness chart after Robbie and Tambry fall in love, the drawing of Lee is not fully drawn for a frame.
 * Nate's mouth disappears for a frame after he hears about Tambry dating Robbie.
 * When Stan is looking at the drawing of the Stan balloon, his bandage is missing.
 * When Stan's hot air balloon rises, it has no basket, but in subsequent shots, it does.
 * The blanket Charlie and his mother are sitting on disappears when the shot widens to show the Stan balloon looming towards them.
 * When the Love God is holding the anti-love potion, the bottle it's in is much larger than the rest of his bottles, even though the bottles were all the same size when Mabel took the anti-love potion.

Northwest Mansion Mystery

 * The appearance of the Northwest Manor is different than when it was seen in "The Golf War."
 * When sitting in the recliner watching TV, there is a pizza box next to Dipper, but in the next shot it's gone, replaced by a can of Pitt Cola.
 * When Dipper answers the door when Pacifica arrives, he is wearing his socks. When he agrees to help her, he's wearing his shoes.
 * Grenda has two ponytails for a few frames before she makes the truce with Candy and Mabel.
 * When the ghost laughs and his beard blazes before he tricks Dipper into releasing him from the silver mirror, his mouth overlaps his nose.
 * Candy drips cheese onto the pastries, but later, when she is talking to Mabel, there is no trail of cheese near the fountain or on the pastries. Also, the pastries' appearance has changed.
 * When Grenda approaches Marius von Fundshauser to pretend that something is on his shirt, a yellow stain can actually be briefly spotted on his shirt.
 * Only a few people are holding glass of apple cider before Preston Northwest gives a toast, but after Preston's glass breaks, everyone is holding a glass.
 * The wooden people change positions several times.
 * When Dipper is turned into wood, his bow tie isn't tied. Later, when Pacifica looks at him, his bow tie is tied and when he turns back to normal, his bow tie is untied again.

Not What He Seems

 * When Stan insists on being included in the fireworks party, Dipper and Mabel switch places from one shot to the next.
 * When Dipper takes a popsicle out of the cooler on the roof, the cooler lid is closed.
 * When the Pines are admiring the fireworks Mabel set off, the cooler disappears for a few frames.
 * Throughout the scene wherein the Pines are playing with fireworks and water balloons, Stan's jacket is buttoned and unbuttoned from shot to shot.
 * When Agent Powers is telling Dipper and Mabel about the doomsday device, Dipper and Mabel switch places from one shot to the next.
 * Stan's bandage disappears for a few frames when he hands the taxi driver money, then reappears in the following frames.
 * When Stan enters the underground laboratory, the door is open, but in the next shot, it's closed. It is open again in the following shot.

A Tale of Two Stans

 * In "Not What He Seems," the left sleeve of Stan's coat is ripped by a tree branch. However, in this episode the tear isn't seen.
 * When Stan moves to punch Ford, his bandage disappears and reappears the next time his hand is visible.
 * After Dipper realizes Ford is the Author, Ford says, "you read my journals?", and pulls Journal #1 out of the left side of his coat, but when he first picked it up off the floor, he put it in a pocket on the right side
 * Ford writes in Journal 1 although that wouldn't be possible because it was shown later in the episode that Journal 1 had no pages left in the book.
 * In Anomalous Phenomena, the book of anomalies Ford reads in college, the pages with the two-headed ducks and cats call the condition "polycephany," when it is supposed to be correctly spelled "polycephaly."
 * During the flashback, after Ford tells Stan to hide Journal 1, Stan goes to burn it. Right before he tries, the front cover is facing away from him, facing toward Ford. When Ford grabs it, it is suddenly facing in the opposite direction.
 * Ford instructs the recently memory-wiped agents, Trigger and Powers, using a few of Mabel's drawings as decoy paperwork. While doing so, the crayon text "What hath science wrought?" on Mabel's self portrait vanishes and reappears.
 * When Stan was escaping the angry customers in New Jersey, he is driving in the wrong direction and would have crashed his car into the beach instead of driving through town.
 * When Ford restrains Stan, a black, upside-down version of his glasses appears above his normal glasses.
 * Near the end of the episode, Ford has changed out of the clothes he wore in the basement, and into his regular ones. However, the clothes still retain the black color pallet, and only take on their normal ones in the next scene
 * When Stan and Ford are looking into the mirror, the reflection shows Stan's bandage on the reflection of his left hand, when it should be on his right hand.
 * Ford is shown writing with both his left hand (when they find the shipwreck when he and Stan are kids, and he leaves their names, and when he is writing in the journal in the present) and his right hand (when he is drawing in his notebook when Stan introduces him in his story, and at various times in school). Either he is ambidextrous, or this is an oversight.

Dungeons, Dungeons, and More Dungeons

 * In the scene when Stan is immitating Duck-tective he is seen with a cleft chin like Ford.
 * When Dipper explains the rules of Dungeons, Dungeons, and More Dungeons to Mabel, during the close up of Mabel's face the color of her sweater's collar, which is supposed to be pink, changes to purple.
 * Mabel's letter to her parents says, "just yesterday gravity reversed itself." However, in "Not What He Seems" Stan says that it is Saturday, and in this episode Mabel says they are having a lazy Tuesday.
 * Many other errors occurred during Mabel's letter writing. After Mabel wrote, "Just yesterday, gravity reversed itself, almost destroying the universe and totally wrecking the whole town!" it cuts to the TV. When it cuts back to Mabel, that portion of the text had disappeared and Mabel was writing, "But the coolest part of the summer was when Gruncle Stan's twin brother came out of this portal thingy" in the place the text was previously. In addition, Mabel said "Now we have two Gruncles for the price of one!" but didn't actually write it down, but when in cut to her picture, it was written next to it. Furthermore, the ink that the pen used was clearly shown to be pink, until it zoomed in on her picture, where the pen started writing in blue ink instead.
 * Mayor Beffuftlefumpter's name is misspelled as "Mayor Befufflefumpter.
 * When Soos walks behind Dipper after he explained "Dungeons Dungeons and more Dungeons", Soos was not wearing his "FCLORP" wristband.
 * While Stan is stapling the turkey head onto the beaver's body, his burn mark is shown on the left side of his back.
 * Mabel claims to have eaten the Cheese Boodles without her hands. However, cheese powder can clearly be seen on her fingers.
 * When Stan swats the fairy on his back, she sticks to him and glitter splatters on the back of his suit. However, in the next frame, the back of Stan's suit is completely clean.
 * When Mabel is talking to Dipper while Dipper is designing his dungeon, Mabel has a hairband in her hair, then, when she starts talking about how Dipper is spending a lot of time with Ford, she isn't wearing a hairband, finally, in the next scene, she is wearing her hairband.
 * When Stan places his gum on the opposite side than the 38 on the dice, it becomes invisible when he rolls it.
 * Dipper and Ford throw the "Death Muffins" into the Impossibeast's mouth, causing them to lose the muffins. When they return to normal size, they are still holding the muffins.
 * When stan is shaking the dice in his hand, It sounds as 2 dice are in there rubbing together. However, only 1 die was in his hand.
 * Right before the commercial break, after Mabel, Grenda, and Stan are loking at the hole the griffin made in the wall, Mabel and Grenda are wearing their Duck-tective hats. However, after the commercial break, they are no longer wearing the hats.

The Stanchurian Candidate

 * Tyler throws his hat into the ring (and apparently so does Sprott, though this isn't seen) but when we see the crowd, both Tyler and Sprott are still wearing their hats.
 * Bud Gleeful punches the map of Gravity Falls, ripping the part where the Mystery Shack is but when we see the map again the place where the Mystery Shack is isn't ripped.
 * Soos wears a blue Suit in the scene following the Town Hall meeting, however, it disappears after the telephone rings.
 * Soos has "STAFF" written on the back of his shirt but when he's on his hands and knees after Mabel turns off the mind control tie the back of his shirt is blank.
 * When Stan enters the diner, Lazy Susan is there. A few seconds later when the angle changes she is gone.
 * When Dipper is in the diner and gets mad at Stan for refusing to wear the tie, the rest of the customers in the diner seem to disappear.
 * When Dipper reveals to Stan that the ties were made to control him, both ties are exactly the same.
 * When Soos is on stage waving at the audience, he keeps waving despite Dipper (wearing the tie) having stopped waving.
 * Stan puts on the sash Mabel knitted for him upside down but once it's on him he's wearing it right side up.
 * There's a mug on a mantel when Stan is sitting on the chair but when he gets up to leave the mug is replaced by a head.
 * At the town meeting, Robbie is initially seen sitting in the back next to his parents, but when everyone gets up to leave, he is in the front row next to Lazy Susan.

The Last Mabelcorn

 * When Ford tells Dipper and Mabel that they need unicorn hair, there is a goof where Mabel has four legs as she jumps off chair.
 * Before Mabel leaves, Ford gives her Journal 1 and a crossbow. When her and the girls are seen later on the quest, the crossbow is gone.
 * When Ford puts the Project Mentem helmet on Dipper, the switch on the top is silver. When Dipper puts it on Ford, the switch is black.
 * When Dipper puts on the helmet on Ford's head, the repeat of the thought "I miss Dimension 52" is misspelled as "I miss Dimention 52."
 * When Wendy, Mabel, Candy and Grenda enter the gates to the unicorns, their positions (relative to each other) changes between some of the frames. In one frame, the order is Grenda, Candy and Mabel (left to right) and in the next frame it is Mabel, Candy, and Grenda (left to right).
 * When Ford and Bill are talking at the end of Ford's flashback, Ford says, "just call me, a friend". When he says, "just call me" he is shown shaking hands with Bill using his left hand, but when he says, "a friend" he is shaking with his right hand.
 * When Dipper and Ford were talking, after Dipper tried to erase Bill out of Ford's mind, the number of fingers on his left hand changes to five for some frames.
 * A symbol in the cryptogram is misplaced on the ancient wall Ford found, making the word decode to "FOOJISH."
 * The treasure revealed by Grenda contains a pair of dice, each die shows two sides with a repeating number symbol.

Roadside Attraction

 * In the first shot of the Mystery Shack after it has been pranked, one of the grafittis of "You Stink" is in neon green, but when it is next seen in a close-up, it is a faded brown color.
 * When Stan and Dipper are in the hot tub, Stan opens a can of Pitt Cola and Dipper's hands are empty. In the next shot (a wider shot) Dipper has a can of Pitt Cola in his hand, too.
 * When Mabel is eating marshmallows there is another set of teeth overlapping her top row of teeth.
 * During the girls' game of Truth or Dare or Don't, after Candy confesses to her crush on Dipper, Mabel says "No" and Candy says "Yes." In the shot when they cut to Candy, her hair is missing from below her ear.
 * The sign on the large raccoon at Mystery Mountain Mummy Museum reads FIRE RETARDANT RACCOON but its recorded message identifies itself as FLAME RETARDANT RACCOON.
 * One of Dipper's pictures of Wendy is a selfie of them. In the selfie, Dipper is missing the pine tree on his hat.
 * When Soos is saying that was fun for 78 hours his mouth disappears for one frame.

Dipper and Mabel vs. the Future

 * When Stan says, "the future," with Soos, Dipper, and Mabel, he has a cleft chin like Ford.
 * Lee and Nate change up the board outside of the school by rearranging the letters in "SAWDUST INHALATION DRILL- 8:00 GO FIGHTING BEAVERS!" to "NO ESCAPE." However there is no "C" or "P" in the former message, so they wouldn't have all the letters needed to write "NO ESCAPE."
 * When Dipper climbs out of the trench made by the droid, he is seen picking up his walkie talkie off the ground. Scattered next to it is a flashlight, a pen, and a small notebook. In the next shot, it shows him and Ford from the side, and the three objects are gone.
 * After releasing the rift, Blendin removes his goggles to reveal Bill's deception and then collapses. However, the next shot of Bill rising above the bodies shows Blendin still wearing his goggles.
 * When Bill leaves Blendin's body, Blendin's body falls and lands on top of the broken pieces of the glass orb that used to hold the rift. The next scene shows Blendin's body laying besides the glass orb's remnants.
 * When Mabel and Blendin are laying on the ground, their shadows go in different directions.
 * When the citizens of Gravity Falls notice the arrival of Bill, Lazy Susan has both eyes open naturally, (which can't be done without her holding her closed eye open)

Weirdmageddon Part 1

 * After Gompers eats a part of Stan's hat, Stan drops his hammer and yells at Gompers. Then the weirdness wave comes, it cuts to Gompers growing, and then it cuts back to Stan, except the hammer is no longer present.
 * When Stan starts yelling and running away from Gompers, his yells do not sync up. His mouth is closed when a yell is heard.
 * Throughout the episode, the number of Gideon's fingers changes between four and five.
 * After the enlarged Gompers eats out a part of the prison, Gideon's finger painting is shown, except the pictures of Mabel have changed places and the word "Love" is no longer present.
 * One frame Toby has a shirt that says Sassy Girl in blue text then the next the text turns black
 * During the scene where the discount auto mart warriors are chasing after Dipper and Wendy, one of the prisoners is eaten by The Horrifying Sweaty One-Armed Monstrosity. However, the same prisoner who was eaten can be seen when Dipper changes Gideon's mind about Bill Cipher.
 * After Dipper and Wendy find Soos, Dipper picks up his hat off the ground. However, the hat was in the car and was never shown to have fallen out.
 * When everyone was running from Bill, Nate was duplicated in the crowd.
 * When Bill was quickly coming up to Dipper, the 3 on Dipper's journal disappeared for one frame.

Weirdmageddon 2: Escape From Reality

 * Manly Dan wasn't shown being taken away by an Eye-Bat, but he is in Bill's "throne of agony" before Sprott was.
 * In the first scene with Dippy Fresh, he switches back and forth between wearing a helmet or just his hat.
 * In Bill's "throne of frozen human agony", Manly Dan is in a different pose than when he was frozen.
 * Similarly, Lazy Susan is in a different pose than in "Weirdmaggedon Part 1."
 * In one shot where Bill is starting to yell, Teeth is missing a tooth. In the next scene when everyone's running away from Bill, the tooth is back in his mouth.
 * In the first flashback, despite the wind blowing to the right, the flag at Eggbert Elementary blows to the left.
 * When Dippy Fresh is "crowd surfing" he awkwardly disappears when he goes behind Dipper's head.
 * When the younger Dipper shaves part of his head in the flashback, his birthmark is not visible.
 * In one of the flashbacks, when Mabel gets gum stuck in her hair, it's on her left side, but when Dipper gets her to shave it off, it's on her right.
 * After Wendy puts her ax away, it disappears.
 * When Dipper, Mabel, Soos, and Wendy come to the shack, there is no golf club on the floor. However when Dipper reaches to get it, it appears on the floor.
 * When the Multi-Bear exits from the bathroom and says his line, Stan's neck is not fully drawn.

Weirdmageddon 3: Take Back The Falls

 * In one shot while Stan is disguised as Ford, his hand is gold.
 * When the refugees are discussing how to save Ford, Wendy is both huddled with McGucket, and standing behind Stan.
 * Creggy G. is both in the Mystery Shack among the refugees and is in Bill's Throne.
 * Deep Chris also is seen in the throne and Mystery Shack.
 * The America guy is seen in the Mystery Shack and on a building with Bud Gleeful and Mr. Poolcheck.
 * Pacifica is seen standing on the cipher wheel in a shot before actually stepping on her symbol in another shot.
 * When the characters that were turned into tapestries are turned back to normal, Gideon is no where to be seen until the next scene.
 * The moving truck is not seen in the shot after it appears even though the next shot should show it.
 * The No Animals Allowed sign that appears on the bus does not appear until after Waddles is put on the bus.
 * Thompson's name is misspelled as "Thomson" on the "See you next summer" note.
 * When Deputy Durland and Sheriff Blubs are hugging and everybody is clapping, Lazy Susan is not wearing lipstick.
 * After Dipper and Mabel are sitting at the table with the blue prints in front of them and Stan and Soos start talking it shows Dipper but not Mabel next to him for a few shots.
 * In the scene in which Wendy reunites with her family, two of her younger brothers have the appearance of background kids, seen in previous episodes.
 * When Dipper is testing out the height-altering crystals, the purple light makes the snow globe bigger instead of smaller.
 * When Ford asks for a pen, there is clearly one in his pocket.
 * Wendy pushes Robbie onto the Zodiac and is on the left. Later, she is on the opposite side when walking onto the Wheel.
 * When Dipper and Mabel are rallying the refugees, Toby is both in the crowd standing and lying down on the couch.
 * When Old Man McGucket, Soos, Wendy, Dipper and Mabel are huddled up to discuss their plan, Mabel's mouth doesn't move, yet she is heard whispering.
 * In Stan's mindscape, the tapestry for The Royal Order of the Holy Mackerel is miscolored. Rather than having a white background with purple around the head, the background is purple and the head is all gold.
 * The color of the spray paint can changes between brown and black.
 * When Mabel put Stan's fez on him, Stan has 6 fingers instead of 5 fingers.
 * Stan's fez becomes noticeably smaller when he puts it on Soos.