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* ''WesternAnimation/RubyGillmanTeenageKraken'' has its narrative depict Chelsea as [[EvilAllAlong a twist villain]], going from a new friend of Ruby to her ArchEnemy at the film's climax where she reveals her true colors. Unfortunately, this was spoiled from the very first trailer outright saying that mermaids are evil, and following trailers and marketing heavily emphasizing krakens and mermaids being enemies and even showing the climax where Chelsea has become a giant sea monster destroying the city. In fact, the marketing was so blatant that [[EpilepticTrees many thought the trailers were deliberately hiding a major twist]].
to:
* ''WesternAnimation/RubyGillmanTeenageKraken'' has its narrative depict Chelsea as [[EvilAllAlong a twist villain]], going from a new friend of Ruby to her ArchEnemy at the film's climax where she reveals her true colors. Unfortunately, this was spoiled from the very first trailer outright saying that mermaids are evil, and following trailers and marketing heavily emphasizing krakens and mermaids being enemies and even showing the climax where Chelsea has become a giant sea monster destroying the city. In fact, the marketing was so blatant that [[EpilepticTrees many thought the trailers were deliberately hiding a major twist]].twist, such as Chelsea turning out to]] ''[[EpilepticTrees not]]'' [[EpilepticTrees be the villain]].
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** Later trailers and commercials for the film spoil the scene where Hank gets poked by a kid and inks in the touch pond, causing the kids in the area to run away. It got to the point where said clip was shown during shows where Ed O'Neil, Hank's voice actor, was interviewed such ''Entertainment Tonight''.
to:
** Later trailers and commercials for the film spoil the scene where Hank gets poked by a kid and inks in the touch pond, causing the kids in the area to run away. It got to the point where said clip was shown during shows where Ed O'Neil, Hank's voice actor, was interviewed such as ''Entertainment Tonight''.
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* ''WesternAnimation/TransformersTheMovie'':
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* ''WesternAnimation/TransformersTheMovie'':''WesternAnimation/TheTransformersTheMovie'':
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* A ''WesternAnimation/SausageParty'' trailer spoils Carl's death.
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* A ''WesternAnimation/SausageParty'' trailer spoils Carl's death.death and Druggie's appearance.
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* The main trailer for ''WesternAnimation/TurningRed'' spoils some of the funniest scenes like Mei breaking her bed, Abby punching Mei, and the bathroom "OMG!" scene, it also spoils Mei giving Tyler a CloseCallHaircut.
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* ''WesternAnimation/KungFuPanda'':
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* ''WesternAnimation/KungFuPanda'':''Franchise/KungFuPanda'':
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** The [[https://www.youtube.com/watch?v=elI5BD5mgVk Japanese trailer]] was even worse about this, as is showed pretty much every main plot point.
* ''WesternAnimation/TransformersTheMovie'' for the most part did a good job of hiding Optimus Prime's death, except for one TV advert that felt the need to give kids a head's up with the line "Does Prime die!?"
* ''WesternAnimation/TransformersTheMovie'' for the most part did a good job of hiding Optimus Prime's death, except for one TV advert that felt the need to give kids a head's up with the line "Does Prime die!?"
to:
** The [[https://www.youtube.com/watch?v=elI5BD5mgVk Japanese trailer]] was even worse about this, as is showed pretty much every main plot point.
*''WesternAnimation/TransformersTheMovie'' ''WesternAnimation/TransformersTheMovie'':
** The promotional material for the most part did a good job of hiding Optimus Prime's death, except for one TV advert that felt the need to give kids a head's up with the line "Does Primedie!?"die!?" Then the very next question the Narrator asks is: "Then, who will lead the Autobots?" There's not much need for a new leader unless the old one dies, ya know...
** The 20th Anniversary DVD set prominently shows Hot Rod opening the Matrix on the inside cover art. This '''literally happens in the last scene of the film'''. And while all the other chapter titles are deliciously subtle, "Megatron Transformed" might have been playing its hand a bit too much.
*
** The promotional material for the most part did a good job of hiding Optimus Prime's death, except for one TV advert that felt the need to give kids a head's up with the line "Does Prime
** The 20th Anniversary DVD set prominently shows Hot Rod opening the Matrix on the inside cover art. This '''literally happens in the last scene of the film'''. And while all the other chapter titles are deliciously subtle, "Megatron Transformed" might have been playing its hand a bit too much.
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** Some trailers for ''WesternAnimation/TrollsBandTogether'' advertised a brand new song by {{Music/NSYNC}}, kind of giving away that [[spoiler: Justin Timberlake's former bandmates appear as trolls]].
to:
** Some trailers for ''WesternAnimation/TrollsBandTogether'' advertised a brand new song by {{Music/NSYNC}}, kind of giving away that [[spoiler: Justin Timberlake's former bandmates appear at the end of the movie as trolls]].
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** The trailers for [[WesternAnimation/ChickenRunDawnOfTheNugget the sequel]] spoiled the appearance of [[spoiler:Mrs. Tweedy]].
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** Some trailers for ''WesternAnimation/TrollsBandTogether'' advertised a brand new song by Music/NSync, kind of giving away [[spoiler: that Justin Timberlake's former bandmates appear as trolls]].
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** Some trailers for ''WesternAnimation/TrollsBandTogether'' advertised a brand new song by Music/NSync, {{Music/NSYNC}}, kind of giving away that [[spoiler: that Justin Timberlake's former bandmates appear as trolls]].
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** Some trailers for ''WesternAnimation/TrollsBandTogether'' advertised a brand new song by Music/NSync, kind of giving away [[spoiler: that Justin Timberlake's bandmates appear as trolls]].
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** Some trailers for ''WesternAnimation/TrollsBandTogether'' advertised a brand new song by Music/NSync, kind of giving away [[spoiler: that Justin Timberlake's former bandmates appear as trolls]].
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** Trailers for ''WesternAnimation/TrollsBandTogether'' spoiled the existence of [[spoiler: Poppy's long-lost sister Viva]].
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** Trailers Some trailers for ''WesternAnimation/TrollsBandTogether'' spoiled the existence advertised a brand new song by Music/NSync, kind of giving away [[spoiler: Poppy's long-lost sister Viva]].that Justin Timberlake's bandmates appear as trolls]].
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** Trailers for ''WesternAnimation/TrollsBandTogether'' spoiled the existence of Poppy's long-lost sister Viva.
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** Trailers for ''WesternAnimation/TrollsBandTogether'' spoiled the existence of [[spoiler: Poppy's long-lost sister Viva.Viva]].
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** Trailers for ''WesternAnimation/TrollsBandTogether'' spoiled the existence of Poppy's long-lost sister Viva.
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* While most trailers for the film avoided this trope, [[https://youtu.be/Bg4jkxbdvHs this trailer]] for ''WesternAnimation/JonahAVeggieTalesMovie'' spoils the WhamLine uttered by Khalil.
to:
* While most trailers for the film avoided this trope, ''WesternAnimation/JonahAVeggieTalesMovie'':
** [[https://youtu.be/Bg4jkxbdvHsthis This trailer]] for ''WesternAnimation/JonahAVeggieTalesMovie'' spoils the WhamLine uttered by Khalil.Khalil.
** Several trailers included a clip of Jonah flopping on the ground and crying, which comes from the scene where Jonah is upset that Khalil ate the plant he used for shade.
** [[https://youtu.be/Bg4jkxbdvHs
** Several trailers included a clip of Jonah flopping on the ground and crying, which comes from the scene where Jonah is upset that Khalil ate the plant he used for shade.
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* While most trailers for the film avoided this trope, [[https://youtu.be/Bg4jkxbdvHs this trailer]] for ''WesternAnimation/JonahAVeggieTalesMovie'' spoils the WhamLine uttered by Khalil.
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* From the start of its marketing, trailers for ''WesternAnimation/RubyGillmanTeenageKraken'' were criticized for giving away most of the plot beats of the film, to the point of causing speculation that there were further twists than what the ads let on that made the trailer reveals less spoilerish. Unfortunately, the trailers proved accurate in giving away the climax of Chelsea becoming a giant monster mermaid hell-bent on destroying the city, further nullifying the film's presented twist of her befriending Ruby to trick her into handing over the krakens' trident.]
to:
* From the start of its marketing, trailers for ''WesternAnimation/RubyGillmanTeenageKraken'' were criticized for giving away most of the plot beats of the film, to the point of causing speculation that there were further twists than what the ads let on that made the trailer reveals less spoilerish. Unfortunately, the trailers proved accurate in giving away the climax of has its narrative depict Chelsea becoming as [[EvilAllAlong a giant monster mermaid hell-bent on destroying the city, further nullifying twist villain]], going from a new friend of Ruby to her ArchEnemy at the film's presented twist of climax where she reveals her befriending Ruby to trick her into handing over true colors. Unfortunately, this was spoiled from the krakens' trident.]very first trailer outright saying that mermaids are evil, and following trailers and marketing heavily emphasizing krakens and mermaids being enemies and even showing the climax where Chelsea has become a giant sea monster destroying the city. In fact, the marketing was so blatant that [[EpilepticTrees many thought the trailers were deliberately hiding a major twist]].
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* ''WesternAnimation/Transformers The Movie'' for the most part did a good job of hiding Optimus Prime's death, except for one TV advert that felt the need to give kids a head's up with the line "Does Prime die!?"
to:
* ''WesternAnimation/Transformers The Movie'' ''WesternAnimation/TransformersTheMovie'' for the most part did a good job of hiding Optimus Prime's death, except for one TV advert that felt the need to give kids a head's up with the line "Does Prime die!?"
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** The trailer spoiled that Charles Muntz is the villain.
** Most trailers for ''Up'' were actually a remarkable aversion to this trope. Other than the presence of a talking dog and a floating balloon house, nothing else was really shown.
** Most trailers for ''Up'' were actually a remarkable aversion to this trope. Other than the presence of a talking dog and a floating balloon house, nothing else was really shown.
to:
** The One trailer spoiled that Charles Muntz is the villain.
** Most other trailers for ''Up'' were actually a remarkable aversion tothis the trope. Other than Aside from the presence of a talking dog and a floating balloon house, nothing else was really shown.
** Most other trailers for ''Up'' were actually a remarkable aversion to
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* The trailers for ''WesternAnimation/TheThiefAndTheCobbler'' had clearly shown the entire plot of the film which included [[spoiler:the three golden balls being stolen from the kingdom, the climatic battle with the main villain One-Eye and Tak and Princess Yum-Yum getting married at the end of the film.]]
* A home video trailer for ''WesternAnimation/TitanAE'' showed the entire movie, start to finish, in order, including the final scenes of [[spoiler:a new Earth being formed and the lead characters on it.]] As a result, some didn't bother to see the movie. Indeed, the movie didn't do well in theaters; this might have been a factor.
* A home video trailer for ''WesternAnimation/TitanAE'' showed the entire movie, start to finish, in order, including the final scenes of [[spoiler:a new Earth being formed and the lead characters on it.]] As a result, some didn't bother to see the movie. Indeed, the movie didn't do well in theaters; this might have been a factor.
to:
* The trailers for ''WesternAnimation/TheThiefAndTheCobbler'' had clearly shown the entire plot of the film which included [[spoiler:the the three golden balls being stolen from the kingdom, the climatic battle with the main villain One-Eye and Tak and Princess Yum-Yum getting married at the end of the film.]]
film.
* A home video trailer for ''WesternAnimation/TitanAE'' showed the entire movie, start to finish, in order, including the final scenes of[[spoiler:a a new Earth being formed and the lead characters on it.]] it. As a result, some didn't bother to see the movie. Indeed, the movie didn't do well in theaters; this might have been a factor.
* A home video trailer for ''WesternAnimation/TitanAE'' showed the entire movie, start to finish, in order, including the final scenes of
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* The TV commercials for ''WesternAnimation/{{Nine}}'' try their best to hide things by cutting rapidly from scene to scene, but they still manage to spoil 2's funeral, the destruction of the Fabrication Machine, the Cat Beast's death, and several of the dolls having their souls sucked out by the talisman.
* The trailers for the US release of ''The Adventures of Panda Warrior'' spoils the ending by showing Patrick fighting the villain.
* Some TV spots for ''WesternAnimation/{{Aladdin}}'' spoiled that The Genie is freed from the lamp.
* [[https://www.youtube.com/watch?v=MZKazzZYTFo&t=6s The trailer]] for ''WesternAnimation/AnAmericanTail: Fievel Goes West'' is a special case. It didn't spoil itself so much, but the fact that the trailer of the sequel movie (which begins with the ending scene of the previous film, with Fievel riding a pigeon with his sister and asking if he could see more of America) was included at the beginning of every VHS release of the first movie after 1991 meant that it revealed the ending of ''An American Tail'' before the movie even started, spoiling that Fievel finds his family for anyone who was watching the movie for the first time.
* The trailer for Creator/DonBluth's ''WesternAnimation/{{Anastasia}}'' spoils the fact that Anya ''is'' Anastasia, and then shows her in the palace, in formal attire, being addressed as "the princess" and "Your Highness". The previous spoiler isn't so bad, since it's to be expected, but the latter is a ''big'' spoiler.
** The trailer for ''WesternAnimation/BartokTheMagnificent'' spoils Ludmilla's transformation into a dragon.
* The trailers for ''WesternAnimation/BigHero6'' never really tried to hide the fact that Tadashi dies, although it happens early in the film. UK advertising reveals that Hiro wants to kill Yokai.
* The toy commercials for the ''Toys/{{Bionicle}}'''s Glatorian Legends line of figures showed glimpses of the then-upcoming movie, ''The Legend Reborn''. Among them, the very shot of the four heroes unleashing the final blast at the Skrall and Bone Hunter army, from the end of the climax! Website promos also spoiled Metus' transformation into a snake, thereby revealing that he was to be the traitor. This was also spoiled by the site's behind-the-scenes videos, which showed the actors recording lines -- fans have narrowed the identity of the traitor down to Berix and Metus, and then the clips showed Berix's VA talking to the traitor.
* Near the end of the second trailer for ''WesternAnimation/TheBookOfLife'', it happens in a brief second but one can see [[spoiler:the Sanchez ancestors]] near the climax.
* ''WesternAnimation/{{Brave}}'':
** As beautiful as the "Mother's Day" trailer is, the trailer may have given away a few of the ending shots of the film at the (pun intended) tail end of it.
** Some other trailers and in-movie shots also show Merida walking with, saving or jumping to the rescue of a bear, which is pretty spoilerish when the first trailers show the main antagonist, or one of the main antagonists, of the movie to be a giant grizzly. Apparently, sources have already revealed the smaller, more timid looking bear that's seen with Merida to be her transformed mother.
** Several movie tie-in books were released before the movie itself, too. Naturally, reading them spoils the whole plot of the movie.
** A toy commercial also completely spoiled the bear transformation.
** The movie is being distributed with trailers for a video game that offers minor spoilers.
* Not as bad as most cases, but there are a few scenes in the trailer for ''WesternAnimation/CaptainUnderpantsTheFirstEpicMovie'' that show Captain Underpants with superpowers, proving that he does gain them at some point in the movie.
* ''WesternAnimation/ChickenRun'': As shown in one of the TV commercials, the chickens manage to escape by making their own pedal-powered plane!
* Almost all the recent promos for ''WesternAnimation/{{Coco}}'' spoil the Sunrise Spectacular concert and Miguel's final song, where Héctor is shown attending the celebration.
* ''WesternAnimation/{{Coraline}}''. The trailer shows the scene where the Other Mother gives Coraline the buttons and sewing needles.
* The second trailer for ''WesternAnimation/DCLeagueOfSuperpets'' spoils that Batman adopts Ace.
* Promotional material for ''WesternAnimation/TheEmojiMovie'' barely tried to hide the fact Smiler was a villain. One trailer, for example, had her threatening the protagonists for leaving the phone.
* ''WesternAnimation/{{Encanto}}'':
** While it's early in the movie, Antonio's gift ceremony is supposed to build up suspense about what gift he gets and whether he has a gift at all, since the previous ceremony (Mirabel's) resulted in no gift. The effect is weakened by the trailers, which clearly show Antonio communicating with animals, spoiling his gift.
** The first trailer clearly showed Bruno talking with Mirabel, even though the first half of the movie sets up his disappearance and the fact he's still in the house is meant to be a surprise.
* ''WesternAnimation/FindingDory'' had a bad case of this:
** Later trailers and commercials for the film spoil the scene where Hank gets poked by a kid and inks in the touch pond, causing the kids in the area to run away. It got to the point where said clip was shown during shows where Ed O'Neil, Hank's voice actor, was interviewed such ''Entertainment Tonight''.
** [[https://m.youtube.com/watch?v=ByqIiRUuoQ0 The clip used to introduce Hank in this April Fool's prank]] is part of the scene where Dory reaches her old home at the Open Ocean exhibit.
** [[https://www.ispot.tv/ad/AS8q/subway-finding-dory-peek-into-dorys-world This Subway commercial for kids' meals based off the film]] uses clips that spoil some major plotlines in the movie, including the fact that Marlin and Nemo wait for Dory in the tanks that are going on the truck to Cleveland.
** [[https://www.youtube.com/watch?v=bnTHJM7ct88 The film's Japanese trailer]] shows the otters bringing Dory into the truck bound for Cleveland as well as Destiny jumping out of her enclosure, both from the film's climax.
* ''Franchise/{{Frozen}}'':
** ''WesternAnimation/{{Frozen|2013}}'':
*** A fan-edited trailer parodies this. The video makes some {{Retraux}} attempts at emulating an ad from TheNineties, with a love ballad playing in the background, some idents from Disney's VHS tapes serving as bookends, and a clip revealing some major points about the climax (the scene in which a freezing Anna tries to stop Hans from killing Elsa) appearing before the title card.
** Official trailers also show some spoileriffic clips, though. This includes Elsa bringing back summer and saving Olaf from melting. A more subtle example is Elsa giving Anna a hug, when Elsa had previously been too scared to approach, much less touch, Anna. It's also apparent on closer examination that this happens after Anna's aforementioned HeroicSacrifice frees herself from the curse.
** Home release trailers for ''WesternAnimation/FrozenII'' reveal the costume change Elsa receives in the last fifteen minutes of the film. There was also a Disney Music ad that had the same spoiler that first appeared a week after the film's theatrical release.
* ''WesternAnimation/TheGoodDinosaur'': Most of the trailers spoil Poppa's death, Arlo's friendship to Spot, the meeting of Forrest Woodbush, Arlo helping the cowboy T-Rexes, Arlo encounters the main villain, Thunderclap and also the climax. In short, the trailers just showed you the entire movie. This could be one of the reasons why the film didn't perform so well at the box office.
* The trailers for ''WesternAnimation/HoodwinkedTooHoodVersusEvil'' stress the fact that Red and co. are trying to save two innocent kids from a wicked witch. Save for the one which shows said "innocent" children with [[SlasherSmile creepy]] [[NightmareFuel grins]] saying: "You've been hoodwinked! Too!"
* ''WesternAnimation/HowToTrainYourDragon2''[='=]s trailer takes no issue with spoiling TheReveal of Hiccup's mother.
* ''WesternAnimation/InsideOut'':
** The Japanese trailers run on this, so they aren't to be seen by anyone (besides people who don't mind about spoilers) before seeing the film itself.
** Some of the American trailers spoil the movie as well. Two notable examples were the clip where Joy rides in Bing Bong's rocket to the top and we can clearly see that he is not in it, and the scene where Joy and Sadness return to Headquarters.
* The [[https://www.youtube.com/watch?v=NYcntkxbFpE first American trailer]] for ''Anime/KikisDeliveryService'' spoils the entire climax.
* ''WesternAnimation/KungFuPanda'':
** The DVD trailer for ''WesternAnimation/KungFuPanda2'' completely spoiled the fact that Po's biological father, and several other pandas, are still alive, which isn't revealed until the last few seconds of the film.
** The DVD trailer for ''WesternAnimation/KungFuPanda3'' spoils literally almost the entire movie, including Kai's destruction of the Jade Palace, Po training of the panda village to fight against Kai, and the final battle in the Spirit Realm.
* The ''original'' trailer for ''WesternAnimation/LadyAndTheTramp'', all the way back in 1955, shows that not only do Lady and Tramp get together, but have puppies to boot.
* One preview of ''WesternAnimation/TheLegoMovie'' showed bits from Emmet's vision, including a live-acted human hand. Also, Bad Cop's fate was revealed by his toy, released prior to the movie. The LEGO sets actually gave away many details, such as Bad Cop's parents getting frozen in glue or Uni-Kitty disguising herself as Business-Kitty, but not always the exact interpretation of the scenes.
* The trailer for ''Life's a Jungle: Africa's Most Wanted'' clearly shows the ending of the movie.
* ''WesternAnimation/{{The Lion King|1994}}''[='s=] trailer spoils most of the plot. Movie posters tend to show Mufasa's ghost as well.
* ''WesternAnimation/MeetTheRobinsons'' had a trailer that showed the future Lewis in a group with the Robinson family, with his arm around Franny from one of the final scenes in the movie, making the big reveal completely predictable.
* ''WesternAnimation/{{Megamind}}'' probably had one of the worst offending trailers, in which it showed that Metro Man was ''not'' dead and had simply given up superheroing after his confrontation with Megamind at the beginning of the film. The entire main plot kicked off with Megamind trying to cope over believing he had killed Metro Man.
* [[https://www.youtube.com/watch?v=Pv7l2QMyaXE This official preview]] for ''WesternAnimation/MonstersUniversity'' spoils the entire plot.
* This ''WesternAnimation/{{Mulan}}'' [[https://www.youtube.com/watch?v=wAbGAkkOgcM trailer]] in which it shows the Emperor's big speech at the end, which in turn gives away big chunks of the movie. It even shows the scene with her turning around and all of China bowing to her.
* The original BMG Video trailer for ''[[WesternAnimation/MagicAdventuresOfMumfie Mumfie's Quest]]'' shows Mr. and Mrs. Admiral being reunited, Whale being freed from a net by the electric eels and part of the scene where Secretary of Night gets turned into stone by the Cloak of Dreams.
* In ''WesternAnimation/ParaNorman'', the trailer [[TrailerJokeDecay spoils nearly every joke]], even if it does not spoil the plot for the most part. However, the Japanese trailer ''did'' spoil the plot.
* The trailer for ''WesternAnimation/PAWPatrolTheMovie'' spoils the scene at the end where Humdinger gets a wedgie, leading to his underwear showing for a second time.
* The second trailer for ''[[WesternAnimation/PostmanPat Postman Pat: the Movie]]'' spoiled Wilf's redemption and the fact that Postman Pat won the singing competition.
* Watch any of the commercials for ''WesternAnimation/ThePowerpuffGirlsMovie'' and you've basically watched the whole thing (which could've been why the movie didn't do so well). It also doesn't help that Creator/CartoonNetwork aired these commercials on practically every commercial break back when the movie came out.
* From the start of its marketing, trailers for ''WesternAnimation/RubyGillmanTeenageKraken'' were criticized for giving away most of the plot beats of the film, to the point of causing speculation that there were further twists than what the ads let on that made the trailer reveals less spoilerish. Unfortunately, the trailers proved accurate in giving away the climax of Chelsea becoming a giant monster mermaid hell-bent on destroying the city, further nullifying the film's presented twist of her befriending Ruby to trick her into handing over the krakens' trident.]
* A ''WesternAnimation/SausageParty'' trailer spoils Carl's death.
* ''Franchise/{{Shrek}}'':
** The nature of Puss in Boots (a cute little kitty who just happens to be a mercenary) is clearly meant to be a comedic twist, but the trailers for ''WesternAnimation/Shrek2'' practically made it the main selling point.
** TV spots for ''Shrek 2'' also showed Donkey as a white stallion, though they didn't show Shrek in his human form.
** ''WesternAnimation/ShrekTheThird''[='s=] merchandise spoiled the birth of the Ogre Triplets (Shrek and Fiona's children), as well as the [[DamselInDistress Distressed Damsel]] [[PrettyPrincessPowerhouse princesses]] going ActionGirl. Some of the trailers showed the princesses' action sequence ''in its entirety''.
* The first trailers for ''WesternAnimation/{{Sing}}'' depicted the most emotional moments of the film, including most of the finale concert. The scenes of Johnny and his father were probably the worst offender, as they show the father in prison rejecting Johnny through phone call and then show him at the end of the film, proud of Johnny's performance, effectively summarizing their entire arc.
** ''WesternAnimation/{{Sing 2}}'' is even worse about it. The only thing that the trailers DON'T spoil is that the wolf boss is even more of a bad guy than he seems. Slightly. And that's about it.
* A French trailer for ''WesternAnimation/SongOfTheSea'' spoils the plot from beginning to end, even going as far as to include the last shot of the film.
* Even the earliest trailers for ''WesternAnimation/SpiderManIntoTheSpiderVerse'' showed the scene of Miles finally taking his "leap of faith" and nearly mastering his powers. Granted, [[JustifiedTrope that plot point's a bit of a given,]] but it's still giving away a ''huge'' plot point.
* One of the trailers for ''WesternAnimation/TheSpongeBobMovieSpongeOutOfWater'' clearly shows Plankton as Plank-Ton.
* The trailers for ''WesternAnimation/StrangeMagic'': The scene where Roland makes out with some kind of insect is frequently shown in trailers.
* The trailers for ''WesternAnimation/TheThiefAndTheCobbler'' had clearly shown the entire plot of the film which included [[spoiler:the three golden balls being stolen from the kingdom, the climatic battle with the main villain One-Eye and Tak and Princess Yum-Yum getting married at the end of the film.]]
* A home video trailer for ''WesternAnimation/TitanAE'' showed the entire movie, start to finish, in order, including the final scenes of [[spoiler:a new Earth being formed and the lead characters on it.]] As a result, some didn't bother to see the movie. Indeed, the movie didn't do well in theaters; this might have been a factor.
* ''WesternAnimation/ToyStory3'':
** ''Toy Story 3'' had trailers that spoiled that the new toys were the villains. And while they never explicitly stated who the BigBad was, many viewers were able to tell just from what was shown (and if not that, then from the other marketing). In the later trailers it almost revealed that the real plot was an [[MoodWhiplash emotional rollercoaster.]]
** The [[https://www.youtube.com/watch?v=elI5BD5mgVk Japanese trailer]] was even worse about this, as is showed pretty much every main plot point.
* ''WesternAnimation/Transformers The Movie'' for the most part did a good job of hiding Optimus Prime's death, except for one TV advert that felt the need to give kids a head's up with the line "Does Prime die!?"
* ''Franchise/{{Trolls}}'':
** Trailers for [[WesternAnimation/{{Trolls}} the first movie]] advertise new songs by Music/JustinTimberlake, who voices a character that does not sing at the beginning of the film. What are the chances this will change by the end?
** A few trailers and promos of ''WesternAnimation/TrollsWorldTour'' basically hinted at Barb's HeelFaceTurn, especially when some commercials showed her on good terms with Poppy and the others.
* ''WesternAnimation/{{Up}}'':
** The trailer spoiled that Charles Muntz is the villain.
** Most trailers for ''Up'' were actually a remarkable aversion to this trope. Other than the presence of a talking dog and a floating balloon house, nothing else was really shown.
* ''WesternAnimation/WallaceAndGromit'':
** A TV spot for ''WesternAnimation/TheCurseOfTheWereRabbit'' spoiled that the were-rabbit is Wallace, showing fuzzy fur popping out of his trademark sweater-vest. It even had the announcer say "What started as a little mistake became a ''big'' problem" over scenes of the mind-manipulator accident and said transformation scene.
** The theatrical trailer was even worse. At one point, it shows Wallace with long, fuzzy rabbit ears. Doesn't get more spoiler-y than that.
* The second trailer for ''WesternAnimation/{{Wolfwalkers}}'' gives away [[spoiler: Bill's wolf form, spoiling that he would become a Wolfwalker as well]].
----
* The trailers for the US release of ''The Adventures of Panda Warrior'' spoils the ending by showing Patrick fighting the villain.
* Some TV spots for ''WesternAnimation/{{Aladdin}}'' spoiled that The Genie is freed from the lamp.
* [[https://www.youtube.com/watch?v=MZKazzZYTFo&t=6s The trailer]] for ''WesternAnimation/AnAmericanTail: Fievel Goes West'' is a special case. It didn't spoil itself so much, but the fact that the trailer of the sequel movie (which begins with the ending scene of the previous film, with Fievel riding a pigeon with his sister and asking if he could see more of America) was included at the beginning of every VHS release of the first movie after 1991 meant that it revealed the ending of ''An American Tail'' before the movie even started, spoiling that Fievel finds his family for anyone who was watching the movie for the first time.
* The trailer for Creator/DonBluth's ''WesternAnimation/{{Anastasia}}'' spoils the fact that Anya ''is'' Anastasia, and then shows her in the palace, in formal attire, being addressed as "the princess" and "Your Highness". The previous spoiler isn't so bad, since it's to be expected, but the latter is a ''big'' spoiler.
** The trailer for ''WesternAnimation/BartokTheMagnificent'' spoils Ludmilla's transformation into a dragon.
* The trailers for ''WesternAnimation/BigHero6'' never really tried to hide the fact that Tadashi dies, although it happens early in the film. UK advertising reveals that Hiro wants to kill Yokai.
* The toy commercials for the ''Toys/{{Bionicle}}'''s Glatorian Legends line of figures showed glimpses of the then-upcoming movie, ''The Legend Reborn''. Among them, the very shot of the four heroes unleashing the final blast at the Skrall and Bone Hunter army, from the end of the climax! Website promos also spoiled Metus' transformation into a snake, thereby revealing that he was to be the traitor. This was also spoiled by the site's behind-the-scenes videos, which showed the actors recording lines -- fans have narrowed the identity of the traitor down to Berix and Metus, and then the clips showed Berix's VA talking to the traitor.
* Near the end of the second trailer for ''WesternAnimation/TheBookOfLife'', it happens in a brief second but one can see [[spoiler:the Sanchez ancestors]] near the climax.
* ''WesternAnimation/{{Brave}}'':
** As beautiful as the "Mother's Day" trailer is, the trailer may have given away a few of the ending shots of the film at the (pun intended) tail end of it.
** Some other trailers and in-movie shots also show Merida walking with, saving or jumping to the rescue of a bear, which is pretty spoilerish when the first trailers show the main antagonist, or one of the main antagonists, of the movie to be a giant grizzly. Apparently, sources have already revealed the smaller, more timid looking bear that's seen with Merida to be her transformed mother.
** Several movie tie-in books were released before the movie itself, too. Naturally, reading them spoils the whole plot of the movie.
** A toy commercial also completely spoiled the bear transformation.
** The movie is being distributed with trailers for a video game that offers minor spoilers.
* Not as bad as most cases, but there are a few scenes in the trailer for ''WesternAnimation/CaptainUnderpantsTheFirstEpicMovie'' that show Captain Underpants with superpowers, proving that he does gain them at some point in the movie.
* ''WesternAnimation/ChickenRun'': As shown in one of the TV commercials, the chickens manage to escape by making their own pedal-powered plane!
* Almost all the recent promos for ''WesternAnimation/{{Coco}}'' spoil the Sunrise Spectacular concert and Miguel's final song, where Héctor is shown attending the celebration.
* ''WesternAnimation/{{Coraline}}''. The trailer shows the scene where the Other Mother gives Coraline the buttons and sewing needles.
* The second trailer for ''WesternAnimation/DCLeagueOfSuperpets'' spoils that Batman adopts Ace.
* Promotional material for ''WesternAnimation/TheEmojiMovie'' barely tried to hide the fact Smiler was a villain. One trailer, for example, had her threatening the protagonists for leaving the phone.
* ''WesternAnimation/{{Encanto}}'':
** While it's early in the movie, Antonio's gift ceremony is supposed to build up suspense about what gift he gets and whether he has a gift at all, since the previous ceremony (Mirabel's) resulted in no gift. The effect is weakened by the trailers, which clearly show Antonio communicating with animals, spoiling his gift.
** The first trailer clearly showed Bruno talking with Mirabel, even though the first half of the movie sets up his disappearance and the fact he's still in the house is meant to be a surprise.
* ''WesternAnimation/FindingDory'' had a bad case of this:
** Later trailers and commercials for the film spoil the scene where Hank gets poked by a kid and inks in the touch pond, causing the kids in the area to run away. It got to the point where said clip was shown during shows where Ed O'Neil, Hank's voice actor, was interviewed such ''Entertainment Tonight''.
** [[https://m.youtube.com/watch?v=ByqIiRUuoQ0 The clip used to introduce Hank in this April Fool's prank]] is part of the scene where Dory reaches her old home at the Open Ocean exhibit.
** [[https://www.ispot.tv/ad/AS8q/subway-finding-dory-peek-into-dorys-world This Subway commercial for kids' meals based off the film]] uses clips that spoil some major plotlines in the movie, including the fact that Marlin and Nemo wait for Dory in the tanks that are going on the truck to Cleveland.
** [[https://www.youtube.com/watch?v=bnTHJM7ct88 The film's Japanese trailer]] shows the otters bringing Dory into the truck bound for Cleveland as well as Destiny jumping out of her enclosure, both from the film's climax.
* ''Franchise/{{Frozen}}'':
** ''WesternAnimation/{{Frozen|2013}}'':
*** A fan-edited trailer parodies this. The video makes some {{Retraux}} attempts at emulating an ad from TheNineties, with a love ballad playing in the background, some idents from Disney's VHS tapes serving as bookends, and a clip revealing some major points about the climax (the scene in which a freezing Anna tries to stop Hans from killing Elsa) appearing before the title card.
** Official trailers also show some spoileriffic clips, though. This includes Elsa bringing back summer and saving Olaf from melting. A more subtle example is Elsa giving Anna a hug, when Elsa had previously been too scared to approach, much less touch, Anna. It's also apparent on closer examination that this happens after Anna's aforementioned HeroicSacrifice frees herself from the curse.
** Home release trailers for ''WesternAnimation/FrozenII'' reveal the costume change Elsa receives in the last fifteen minutes of the film. There was also a Disney Music ad that had the same spoiler that first appeared a week after the film's theatrical release.
* ''WesternAnimation/TheGoodDinosaur'': Most of the trailers spoil Poppa's death, Arlo's friendship to Spot, the meeting of Forrest Woodbush, Arlo helping the cowboy T-Rexes, Arlo encounters the main villain, Thunderclap and also the climax. In short, the trailers just showed you the entire movie. This could be one of the reasons why the film didn't perform so well at the box office.
* The trailers for ''WesternAnimation/HoodwinkedTooHoodVersusEvil'' stress the fact that Red and co. are trying to save two innocent kids from a wicked witch. Save for the one which shows said "innocent" children with [[SlasherSmile creepy]] [[NightmareFuel grins]] saying: "You've been hoodwinked! Too!"
* ''WesternAnimation/HowToTrainYourDragon2''[='=]s trailer takes no issue with spoiling TheReveal of Hiccup's mother.
* ''WesternAnimation/InsideOut'':
** The Japanese trailers run on this, so they aren't to be seen by anyone (besides people who don't mind about spoilers) before seeing the film itself.
** Some of the American trailers spoil the movie as well. Two notable examples were the clip where Joy rides in Bing Bong's rocket to the top and we can clearly see that he is not in it, and the scene where Joy and Sadness return to Headquarters.
* The [[https://www.youtube.com/watch?v=NYcntkxbFpE first American trailer]] for ''Anime/KikisDeliveryService'' spoils the entire climax.
* ''WesternAnimation/KungFuPanda'':
** The DVD trailer for ''WesternAnimation/KungFuPanda2'' completely spoiled the fact that Po's biological father, and several other pandas, are still alive, which isn't revealed until the last few seconds of the film.
** The DVD trailer for ''WesternAnimation/KungFuPanda3'' spoils literally almost the entire movie, including Kai's destruction of the Jade Palace, Po training of the panda village to fight against Kai, and the final battle in the Spirit Realm.
* The ''original'' trailer for ''WesternAnimation/LadyAndTheTramp'', all the way back in 1955, shows that not only do Lady and Tramp get together, but have puppies to boot.
* One preview of ''WesternAnimation/TheLegoMovie'' showed bits from Emmet's vision, including a live-acted human hand. Also, Bad Cop's fate was revealed by his toy, released prior to the movie. The LEGO sets actually gave away many details, such as Bad Cop's parents getting frozen in glue or Uni-Kitty disguising herself as Business-Kitty, but not always the exact interpretation of the scenes.
* The trailer for ''Life's a Jungle: Africa's Most Wanted'' clearly shows the ending of the movie.
* ''WesternAnimation/{{The Lion King|1994}}''[='s=] trailer spoils most of the plot. Movie posters tend to show Mufasa's ghost as well.
* ''WesternAnimation/MeetTheRobinsons'' had a trailer that showed the future Lewis in a group with the Robinson family, with his arm around Franny from one of the final scenes in the movie, making the big reveal completely predictable.
* ''WesternAnimation/{{Megamind}}'' probably had one of the worst offending trailers, in which it showed that Metro Man was ''not'' dead and had simply given up superheroing after his confrontation with Megamind at the beginning of the film. The entire main plot kicked off with Megamind trying to cope over believing he had killed Metro Man.
* [[https://www.youtube.com/watch?v=Pv7l2QMyaXE This official preview]] for ''WesternAnimation/MonstersUniversity'' spoils the entire plot.
* This ''WesternAnimation/{{Mulan}}'' [[https://www.youtube.com/watch?v=wAbGAkkOgcM trailer]] in which it shows the Emperor's big speech at the end, which in turn gives away big chunks of the movie. It even shows the scene with her turning around and all of China bowing to her.
* The original BMG Video trailer for ''[[WesternAnimation/MagicAdventuresOfMumfie Mumfie's Quest]]'' shows Mr. and Mrs. Admiral being reunited, Whale being freed from a net by the electric eels and part of the scene where Secretary of Night gets turned into stone by the Cloak of Dreams.
* In ''WesternAnimation/ParaNorman'', the trailer [[TrailerJokeDecay spoils nearly every joke]], even if it does not spoil the plot for the most part. However, the Japanese trailer ''did'' spoil the plot.
* The trailer for ''WesternAnimation/PAWPatrolTheMovie'' spoils the scene at the end where Humdinger gets a wedgie, leading to his underwear showing for a second time.
* The second trailer for ''[[WesternAnimation/PostmanPat Postman Pat: the Movie]]'' spoiled Wilf's redemption and the fact that Postman Pat won the singing competition.
* Watch any of the commercials for ''WesternAnimation/ThePowerpuffGirlsMovie'' and you've basically watched the whole thing (which could've been why the movie didn't do so well). It also doesn't help that Creator/CartoonNetwork aired these commercials on practically every commercial break back when the movie came out.
* From the start of its marketing, trailers for ''WesternAnimation/RubyGillmanTeenageKraken'' were criticized for giving away most of the plot beats of the film, to the point of causing speculation that there were further twists than what the ads let on that made the trailer reveals less spoilerish. Unfortunately, the trailers proved accurate in giving away the climax of Chelsea becoming a giant monster mermaid hell-bent on destroying the city, further nullifying the film's presented twist of her befriending Ruby to trick her into handing over the krakens' trident.]
* A ''WesternAnimation/SausageParty'' trailer spoils Carl's death.
* ''Franchise/{{Shrek}}'':
** The nature of Puss in Boots (a cute little kitty who just happens to be a mercenary) is clearly meant to be a comedic twist, but the trailers for ''WesternAnimation/Shrek2'' practically made it the main selling point.
** TV spots for ''Shrek 2'' also showed Donkey as a white stallion, though they didn't show Shrek in his human form.
** ''WesternAnimation/ShrekTheThird''[='s=] merchandise spoiled the birth of the Ogre Triplets (Shrek and Fiona's children), as well as the [[DamselInDistress Distressed Damsel]] [[PrettyPrincessPowerhouse princesses]] going ActionGirl. Some of the trailers showed the princesses' action sequence ''in its entirety''.
* The first trailers for ''WesternAnimation/{{Sing}}'' depicted the most emotional moments of the film, including most of the finale concert. The scenes of Johnny and his father were probably the worst offender, as they show the father in prison rejecting Johnny through phone call and then show him at the end of the film, proud of Johnny's performance, effectively summarizing their entire arc.
** ''WesternAnimation/{{Sing 2}}'' is even worse about it. The only thing that the trailers DON'T spoil is that the wolf boss is even more of a bad guy than he seems. Slightly. And that's about it.
* A French trailer for ''WesternAnimation/SongOfTheSea'' spoils the plot from beginning to end, even going as far as to include the last shot of the film.
* Even the earliest trailers for ''WesternAnimation/SpiderManIntoTheSpiderVerse'' showed the scene of Miles finally taking his "leap of faith" and nearly mastering his powers. Granted, [[JustifiedTrope that plot point's a bit of a given,]] but it's still giving away a ''huge'' plot point.
* One of the trailers for ''WesternAnimation/TheSpongeBobMovieSpongeOutOfWater'' clearly shows Plankton as Plank-Ton.
* The trailers for ''WesternAnimation/StrangeMagic'': The scene where Roland makes out with some kind of insect is frequently shown in trailers.
* The trailers for ''WesternAnimation/TheThiefAndTheCobbler'' had clearly shown the entire plot of the film which included [[spoiler:the three golden balls being stolen from the kingdom, the climatic battle with the main villain One-Eye and Tak and Princess Yum-Yum getting married at the end of the film.]]
* A home video trailer for ''WesternAnimation/TitanAE'' showed the entire movie, start to finish, in order, including the final scenes of [[spoiler:a new Earth being formed and the lead characters on it.]] As a result, some didn't bother to see the movie. Indeed, the movie didn't do well in theaters; this might have been a factor.
* ''WesternAnimation/ToyStory3'':
** ''Toy Story 3'' had trailers that spoiled that the new toys were the villains. And while they never explicitly stated who the BigBad was, many viewers were able to tell just from what was shown (and if not that, then from the other marketing). In the later trailers it almost revealed that the real plot was an [[MoodWhiplash emotional rollercoaster.]]
** The [[https://www.youtube.com/watch?v=elI5BD5mgVk Japanese trailer]] was even worse about this, as is showed pretty much every main plot point.
* ''WesternAnimation/Transformers The Movie'' for the most part did a good job of hiding Optimus Prime's death, except for one TV advert that felt the need to give kids a head's up with the line "Does Prime die!?"
* ''Franchise/{{Trolls}}'':
** Trailers for [[WesternAnimation/{{Trolls}} the first movie]] advertise new songs by Music/JustinTimberlake, who voices a character that does not sing at the beginning of the film. What are the chances this will change by the end?
** A few trailers and promos of ''WesternAnimation/TrollsWorldTour'' basically hinted at Barb's HeelFaceTurn, especially when some commercials showed her on good terms with Poppy and the others.
* ''WesternAnimation/{{Up}}'':
** The trailer spoiled that Charles Muntz is the villain.
** Most trailers for ''Up'' were actually a remarkable aversion to this trope. Other than the presence of a talking dog and a floating balloon house, nothing else was really shown.
* ''WesternAnimation/WallaceAndGromit'':
** A TV spot for ''WesternAnimation/TheCurseOfTheWereRabbit'' spoiled that the were-rabbit is Wallace, showing fuzzy fur popping out of his trademark sweater-vest. It even had the announcer say "What started as a little mistake became a ''big'' problem" over scenes of the mind-manipulator accident and said transformation scene.
** The theatrical trailer was even worse. At one point, it shows Wallace with long, fuzzy rabbit ears. Doesn't get more spoiler-y than that.
* The second trailer for ''WesternAnimation/{{Wolfwalkers}}'' gives away [[spoiler: Bill's wolf form, spoiling that he would become a Wolfwalker as well]].
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