History SeriesContinuityError / WesternAnimation

** Of course, that was just a CutawayGag, which only happen for RuleOfFunny anyway.

* In the ''WesternAnimation/KimPossible'' episode "Clean Slate", there's a scene at the end where Kim flashbacks to all the times Ron lost his pants. Two of those are from the episode "Exchange" which featured Ron in Japan. Odd she'd flash back to those events, as she '''wasn't even at them'''.

** Grim's has been given three origin stories about how he became the Reaper. To list them: When his parents told him it was his "destiny" as a child and forced him into it, despite his desire to sing; found out his true calling, also as a child, but kept up the image of being a country rocker for over a millennia to please his father; and finally, he got the job in a "once in an eternity" school election to be one, competing with [[HarmlessVillain The Boogey Man]] and [[BigBad his]] [[RememberTheNewGuy old]] [[ChildhoodFriends Childhood Friend]] [[DemonicSpiders from]] ''[[TheMovie Wrath of the Spider Queen]]''. The probably only concrete thing about his reaping origins (at least in two of them) is that he started doing it as early as cavemen and/or dinosaurs.

* In ''WesternAnimation/HerculesTheAnimatedSeries'', Hercules and Hades always run into each other every other episode, despite the fact that in the film this series is based off of, Hades isn't even supposed to realize Hercules was still alive until the latter is an adult. While a continuity error, this actually makes more sense than the movie due to the plot hole that goes along with it... how on Earth could ''the lord of the dead'' '''not''' be aware that Hercules ''wasn't dead''?

** In "Born Again Krabs", Mr. Krabs insists on trying to sell a clearly inedible Krabby Patty and eventually eats it himself, yet he previously flipped out at the sight of what he thought was a spoiled patty in "Patty Hype" and tried to KillItWithFire. Similarly, in "Cuddle E. Hugs", [=SpongeBob=] gets sick from eating another old patty when "Born Again Krabs" had him throw out the first one without a second thought.

** Most flashbacks are content with showing that Marge has naturally blue hair, however at least one (from "The Way We Weren't") showed that she had brown hair as a child.

** Most flashbacks are content with showing that Marge has naturally blue hair, however at least one showed that she had brown hair as a child.

** In the episode "Lisa's Wedding", Maude Flanders is clearly visible at the wedding fifteen years into the future, even though Bart and Lisa are still children when Maude dies in "Alone Again, Natura-Diddly".
*** This one really isn't an error - what we see was Lisa interpreting what the carnival psychic told her, not the actual truth. Naturally, Lisa nor the psychic could know that Maude would die.

* In the episode "Dial M for Mother" of ''WesternAnimation/{{Archer}}'', Malory was shown to be as old and wrinkled as she currently is, standing next to her adolescent son Sterling in a flashback. This was corrected in flashbacks in later episodes, especially one in the episode "Heart of Archness: Part III" where she was shown as a younger black-haired woman during Sterling's adolescence, a somewhat gray-haired middle-age woman during his teenage years, and her current old self when he was trying to get into the army as an adult.

* In the episode "Dial M for Mother" of ''WesternAnimation/{{Archer}}'', Malory was shown to be as old and wrinkled as she currently is, standing next to her adolescent son Sterling in a flashback. This was corrected in flashbacks in later episodes, especially one in the episode "Heart of Archness: Part III" where she was shown as a younger black-haired woman during Sterling's adolescence, a somewhat gray-haired middle-age woman during his teenage years, and her current old self when was trying to get into the army as an adult.

* In the episode "Dial M for Mother" of ''WesternAnimation/{{Archer}}'', Malory was shown to be as old and wrinkled as she currently is standing next to her adolescent son Sterling in a flashback. This was corrected in flashbacks in later episodes, especially one in the episode "Heart of Archness: Part III" where she was shown as a younger black-haired woman during Sterling's adolescence, a somewhat gray-haired middle-age woman during his teenage years, and her current old self when was trying to get into the army as an adult.

** During the TDI special, Chris says that Owen is the youngest of three brothers. In ''Action'', Owen gives anecdotes about his two ''younger'' brothers.

** A lot of information about the characters comes from [[AllThereInTheManual their online bios]], but the show seems to contradict them fairly often. Similar to Owen, Geoff's bio says that he's the oldest of five brothers, while on the show he once mentions having at least one older brother. Trent's father is supposedly an accountant, but on the show he says he's a lawyer ([[WildMassGuessing maybe]] [[UnreliableNarrator he was lying]] to avoid eating that garbage?) There are at least hints of this in other places, like Harold supposedly having an older brother and a younger sister, but alluding to his sister as having psychology books as if she were in college.
** In the spinoff ''WesternAnimation/TotalDramaPresentsTheRidonculousRace'', Owen remarks that he wasn't upset about being eliminated as he had already won a million dollars. He actually only won a hundred thousand dollars in ''Island'' which he forfeited by accepting Chris' million dollar scavenger hunt.

** In the Season 4 episode "Pinkie Pride", Mr. and Mrs. Cake mention the foal shower Pinkie threw before Pound and Pumpkin were born, implying that she knew they were going to have twins. In the beginning of the Season 2 episode "Baby Cakes", Pinkie and the rest of the Mane Six didn't know the Cakes were having twins until the day they were born.

*** Homer's half-brother Herb (voiced by [[Series/ItsAlwaysSunnyInPhiladelphia Danny DeVito]]) apparently is immune from this (or the writers forgot that he existed), as he had his own car company (until he hired Homer to design him a new car), then got rich by inventing a machine that translates baby babbling. Then again, Herb could have gotten his smarts from his mom's side (his mother being the carny woman who ran the dunk tank and has sex with Abe for money).

* ''WesternAnimation/BackToTheFuture'', "[[Recap/BackToTheFutureTheAnimatedSeriesS1E5RomanHoliday Roman Holiday]]". While visiting Rome, Marty accepts a race against Biff's Roman ancestor Bifficus after he calls Marty a chicken. This contradicts the huge lesson about self-control that Marty had learned around the time of his showdown with Mad Dog Tannen in [[Film/BackToTheFuturePartIII the third film]].[[note]]Some people might allege that a chariot race might be less dangerous than a gunfight, and that Marty losing that race was important to history, but it still doesn't explain why "chicken" is still such a BerserkButton for him.[[/note]]

* ''WesternAnimation/StarWarsTheCloneWars'': UnCanceled season 7 premiere [[Recap/StarWarsTheCloneWarsS7E1TheBadBatch "The Bad Batch"]] includes a scene where Captain Rex looks at a PreciousPhoto of himself and Commander Cody with the late ARC troopers Fives and Echo. The problem is that said photo, which could ''only'' have been taken during the timeline of season 3 (between the episodes [[Recap/StarWarsTheCloneWarsS3E2ARCTroopers "ARC Troopers"]], where Fives and Echo got promoted, and [[Recap/StarWarsTheCloneWarsS3E18TheCitadel "The Citadel"]], the beginning of the arc where Echo dies[[spoiler:... [[NeverFoundTheBody seemingly]]]]), depicts Cody and Rex wearing Phase II clone trooper armour, which was not introduced onto the show until season 4, with Cody and Rex first depicted in Phase II armour in that season's seventh episode, [[Recap/StarWarsTheCloneWarsS4E7DarknessOnUmbara "Darkness on Umbara"]].

** In the much maligned episode "The Principal and the Pauper", it's revealed that Skinner is actually a former street punk named Armin Tamzarian who served with the real Sgt. Seymour Skinner and assumed his identity when the latter was reported KIA. But in the earlier episode "Sweet Seymour Skinner's Baadasssss Song", he managed to reenlist in the Army as Seymour Skinner with no problems despite using the name of a man ''the same military reported to be dead.'' Grandpa Simpson also mentions Sheldon Skinner, the radio officer in his unit, who physically resembles Tamzarian/Skinner and has the exact same voice.

*** Awesomely {{lampshade|Hanging}}d in a comic that came with the Rodimus Vs. Cyclonus figures, but written by SimonFurman, so ''not'' the usual toy pack-in fluff. At one point, Cyclonus complains that he hasn't gotten any respect in ''either'' of his lives (referencing having been someone else on a ''few'' occasions, without ever saying who he used to be) and that he was supposed to get his own troops but they never materialized. Rodimus would later say to him "I don't know who you are, or even who you used to be, and I don't care!" as they get ready to fight.[[note]]The toy itself contains a continuity error: Rodimus is in his original car form, in which he was called Hot Rod, but his toys are all sold under the more trademarkable name "Rodimus" no matter the form. (Also handled amusingly and appropriately in the comic: Rodimus would either have to be called by a name that defies the toy the comic is packed with, or a name that is at odds with the story. As such, he never has ''either'' of his names spoken.)[[/note]]

* ''WesternAnimation/StarWarsTheCloneWars'': {{Uncancelled}} season 7 premiere [[Recap/StarWarsTheCloneWarsS7E1TheBadBatch "The Bad Batch"]] includes a scene where Captain Rex looks at a PreciousPhoto of himself and Commander Cody with the late ARC troopers Fives and Echo. The problem is that said photo, which could ''only'' have been taken during the timeline of season 3 (between the episodes [[Recap/StarWarsTheCloneWarsS3E2ARCTroopers "ARC Troopers"]], where Fives and Echo got promoted, and [[Recap/StarWarsTheCloneWarsS3E18TheCitadel "The Citadel"]], the beginning of the arc where Echo dies[[spoiler:... [[NeverFoundTheBody seemingly]]]]), depicts Cody and Rex wearing Phase II clone trooper armour, which was not introduced onto the show until season 4, with Cody and Rex first depicted in Phase II armour in that season's seventh episode, [[Recap/StarWarsTheCloneWarsS4E7DarknessOnUmbara "Darkness on Umbara"]].

** In the season 18 episode "Short Cuts", Brian is getting neutered. However, in the season 4 episode "Blind Ambition", he already been neutered.

* ''WesternAnimation/StarWarsTheCloneWars'': {{Uncancelled}} season 7 premiere [[Recap/StarWarsTheCloneWarsS7E1TheBadBatch "The Bad Batch"]] includes a scene where Captain Rex looks at a PreciousPhoto of himself and Commander Cody with the late ARC troopers Fives and Echo. The problem is that in said photo, which could ''only'' have been taken during the timeline of season 3 (between the episodes [[Recap/StarWarsTheCloneWarsS3E2ARCTroopers "ARC Troopers"]], where Fives and Echo got promoted, and [[Recap/StarWarsTheCloneWarsS3E18TheCitadel "The Citadel"]], the beginning of the arc where Echo dies[[spoiler:... [[NeverFoundTheBody seemingly]]]]), depicts Cody and Rex wearing Phase II clone trooper armour, which was not introduced onto the show until season 4, with Cody and Rex first depicted in Phase II armour in that season's seventh episode, [[Recap/StarWarsTheCloneWarsS4E7DarknessOnUmbara "Darkness on Umbara"]].

** While discussing a possible traitor in the ranks, Comicbook/JeanGrey says that it could be her, and asks Comicbook/{{Cyclops}} if he's forgotten about her unspecified "bad moments." This was presumably referencing ''Comicbook/TheDarkPhoenixSaga'', a storyline that wouldn't be adapted until the third season.

* To list ''all'' of ''WesternAnimation/TheSimpsons'' series continuity errors would take forever and a day. Because Wiki/TVTropes loves you (and doesn't want to waste time, space, and bandwidth), we're going to list only the most egregious examples (if they begin taking over the page, the section will be split off to its own segment).