Line #184 SeriesContinuityError/WesternAnimation


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6	----
7	[[index]]
8	* ''SeriesContinuityError/TheAmazingWorldOfGumball''
9	* ''SeriesContinuityError/AmericanDad''
10	* ''SeriesContinuityError/TotalDrama''
11	[[/index]]
12	----
13
14	!!Examples:
15	* ''WesternAnimation/{{Animaniacs}}''
16	** The "Newsreel of the Stars" that opened the first episode, detailing the Warner siblings' backstory, tells us that the nonsensical films the Warners made in the '30s were locked in the studio vault and never released, and that after the Warners themselves were locked in the water tower, the studio denied their existence until they escaped in the '90s. Later in the series, the Warners are portrayed as having been popular stars in the '30s, and as having been let out of the tower several times across the decades: to make a promotional cartoon during WWII, to run wherever they liked while the tower was being fumigated for termites, and lent out to different studios in the '70s.
17	** The show was also inconsistent about whether the Warners were created in 1929 or 1930, and whether their first cartoons were silent or had sound from the start. This one was actually brought up in the "Please Please Pleese Get A Life Foundation" short.
18	** In the RashomonStyle cartoon "...And Justice For Slappy", Skippy opens his flashback portion by saying "I was on my way to visit Aunt Slappy." Later episodes make it clear that he lives with her.
19	* 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 failing his army training as an adult.
20	* ''WesternAnimation/{{Arthur}}''
21	** In an episode, Sue Ellen is seen in a Kindergarten class photo when in fact she transferred to Lakewood Elementary in third grade.
22	** In "Arthur's Dummy Disaster", Muffy appears in a flashback to the cast in kindergarten, when she moved to Elwood City in the second grade.
23	** Another episode has Pal present when Arthur and D.W. were younger, even though he was gotten when they were still their present age.
24	** In one episode D.W.'s mother calls her by her full name: Donna Wilson. A later episode revolves around D.W. hating her full name: Dora Winifred. The latter name has been used ever since.
25	** In a {{flashback}} in "[[Recap/ArthurS1E11ArthursBabyDWsBaby Arthur's Baby]]," a baby Mr. Ratburn is called Emil by his mother while he scrawls multiplication sums on the wall. However, in future episodes, his first name is said to be Nigel.
26	** Mr. Haney's first name is Herb in the episodes "[[Recap/ArthurS2E10DWGoesToWashingtonArthursMysteryEnvelope Arthur's Mystery Envelope]]" and "[[Recap/ArthurS3E5TheChipsAreDownRevengeOfTheChip The Chips Are Down]]," but later episodes give him the name Francis.
27	** Mrs. [=MacGrady=]'s first name was originally Sarah, but in "The Great [=MacGrady=]", it was changed to Leah, presumably in memory of Leah Ryan, who co-wrote the episode and passed away before it was completed.
28	** In the season 14 episode "[[Recap/ArthurS14E2TheAgentOfChangeDWUntiesTheKnot D.W. Unties the Knot]]," D.W. is unaware that having a wedding means marrying someone, thinking it is nothing more than a fancy party. However, she witnessed her aunt getting married with her own eyes back in season 1's "[[Recap/ArthurS1E25DWThinksBigArthurCleansUp D.W. Thinks Big]]." She even makes a ContinuityNod to that episode in this one, so it's not a case of OutOfOrder either.
29	* ''WesternAnimation/BackToTheFuture'':
30	** "[[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., as the ending of the third movie had him ignoring it when [[TheBully Needles]] tried to get him into a drag race.[[/note]]
31	** "[[Recap/BackToTheFutureTheAnimatedSeriesS1E11GoneFishin Gone Fishin']]": The story begins with Doc's phobia of fish and fishing destroying his sons' hopes of attending a fishing contest. However, a large marlin appears on Doc's wall during the movies.
32	* ''Franchise/Ben10'':
33	** ''WesternAnimation/Ben10AlienForce'' and ''WesternAnimation/Ben10UltimateAlien'' gets a lot of flak for its many continuity errors of the original series (it could be obviously due to Dwayne [=McDuffie=] lack of input to the original series). While ''WesternAnimation/Ben10Omniverse'' fixes some of UAF's continuity errors, even it suffers from continuity errors as well such as having Ben & Gwen meet Kevin again as kids when it was established in ''Alien Force'' that they hadn't seen him since he was trapped in the [[VoidBetweenTheWorlds Null Void]]. All three sequels at times contradict their own continuity as well.
34	* The 2006 ''WesternAnimation/BikerMiceFromMars'' series was meant to be a SequelSeries to the original 1993 show, but Vinnie is depicted in some episodes as liking pizza even though the original series established that the Biker Mice '''hate''' cheese.
35	* ''WesternAnimation/{{Caillou}}'': In "Big Brother Caillou", as well as some other episodes where Caillou was younger, Caillou's family had Gilbert before Rosie was born. But in "A New Member of the Family", Gilbert becomes Caillou's pet after Rosie was already born.
36	* In the GrandFinale of ''WesternAnimation/CampLazlo'', [[spoiler: Scoutmaster Lumpus is ultimately exposed as a fraud and a phony who had [[WesternAnimation/RockosModernLife the real scoutmaster (an elderly, shaved Heffer)]] locked up in the closet all summer, and is immediately removed from the camp and sent to the asylum,]] however in an early episode, Lumpus claims that his family has been the scoutmaster for at least three generations, [[spoiler:although it's quite possible that Lumpus may actually be lying.]] Flashbacks in other episodes also indicate that he has been scoutmaster for years. As Slinkman is present in and remembers these flashbacks, this rules out the possibility that those were a case of UnreliableExpositor.
37	* ''Series/CodeLyokoEvolution'' has some with its mother series, ''WesternAnimation/CodeLyoko'':
38	** While the character's abilities to deactivate towers is new, their ability to enter towers is played as a brand new development. In the original series, all of the characters were shown entering and exiting towers as the plot demanded it. While this could be passed off as them being unable to enter activated towers before, this was never shown and is a stretch.
39	** Additionally, in ''Evolution'', Odd quips that he has only piloted the ''[[CoolShip Skidbladnir]]'' once, while in ''Code Lyoko'' season 4 he pilots the ''Skid'' twice.
40	** Also in the original ''Code Lyoko'', during "A Fine Mess" Odd and Yumi swap bodies and Odd claims he doesn't know how to eat with chopsticks and has to resort to using a plastic fork. However, only a few episodes earlier, Odd was depicted eating with chopsticks perfectly quite clearly.
41	** In one episode, William saves Ulrich from drowning in the gym's pool by swimming. In a later episode, he panics when he's about to fall into a river because he "can't swim".
42	* ''WesternAnimation/CodenameKidsNextDoor'': In a show with surprisingly good continuity, "Operation: C.O.L.L.E.G.E." has the other kids kidnapping Numbuh One from Professor XXXL, and not even batting an eyelid when XXXL says he's using Numbuh One for his snowcone research... even though his snowcone research was the plot twist of his previous appearance ("Operation: A.R.C.T.I.C.").
43	* ''WesternAnimation/{{Daria}}'' has a few, both in the cartoon and with [[AllThereInTheManual extra materials]]. A list can be found [[https://web.archive.org/web/20161031163721/https://dariawiki.org/wiki/index.php?title=Off-Canon_Canon#Conflicting_Information here]].
44	* Franchise/DCAnimatedUniverse:
45	** [[WesternAnimation/BatmanTheAnimatedSeries Batman]] makes a comment that electricity has no effect on Clayface. Later in ''The New Batman Adventures'' and ''WesternAnimation/JusticeLeague'', Clayface is easily disabled by electric attacks.
46	** In his second appearance in ''WesternAnimation/SupermanTheAnimatedSeries'', Metallo's human skin and clothing are all destroyed, giving him his full robotic appearance from the comics. In his next and subsequent DCAU appearances, however, he's inexplicably reverted back to his half-human, half-robotic look from the second half of his debut episode as Metallo.
47	* The infamous ''WesternAnimation/DextersLaboratory'' episode, "Dexter Vs. Santa's Claws" involves Dexter trying to prove to [=DeeDee=] that Santa Claus isn't real. However, the ending to the first episode of season 2, "Beard to Be Feared" has Dexter being spotted by two elves mistaking him for Santa after getting covered in flour.
48	* ''WesternAnimation/{{Duckman}}'': The show features several conflicting flashbacks depicting how Duckman and Cornfed first met. Season 1's "Civil War" has them meeting in a store Cornfed worked at, with Duckman being an obnoxious customer that he saves ''three'' times from a robber. Season 3's "The Girls of Route Canal", however, shows Duckman encountering Cornfed years earlier at an airport while looking for Beatrice. This one is explicitly a subversion played for laughs, as Cornfed attempts to introduce himself and help Duckman, but the mallard is in full JerkAss mode, so he barely even acknowledges him outside of insults. Finally, Season 4's "From Brad to Worst" shows them as long-time friends in high school. The writers may have been aware of the error, but this one was ''not'' played for laughs.
49	* ''WesternAnimation/TheFairlyOddParents'' has a lot of Continuity Errors, especially in the later seasons:
50	** The Season 7 episode "Double-Oh-Schnozmo!" introduces Cosmo's [[LongLostUncleAesop brother Schnozmo]], despite the earlier episode "The Gland Plan" claiming that Cosmo didn't have any siblings.
51	** Sparky's scrapbook in his debut episode shows that many of his previous owners were explicitly human adults, who aren't supposed to know fairies exist.
52	** Season 10 has several scenes where fairies interact with humans (including Crocker). One of the most important elements of the series is that fairies must be [[TheMasquerade kept a secret]] to everyone who isn't a godchild.
53	** In one of the Season 10 episodes, Vicky acts evil around Timmy's parents. Vicky being a terrible babysitter is supposed to be a secret, and in "Channel Chasers", Vicky is fired after Timmy's parents learn the truth about how she treats Timmy.
54	* ''WesternAnimation/FamilyGuy''
55	** One episode shows via flashback that Peter, Cleveland, and Quagmire grew up together in high school, yet another episode later on shows Peter meeting Quagmire and Cleveland for the first time in their adult lives, and another episode after that shows that Quagmire is at least 15 or 20 years older than the rest of the group. Even more confusing, ''WesternAnimation/TheClevelandShow'' depicts on more than one occasion that Cleveland attended high school in Stoolbend, not Quahog.
56	** While “Fox-y Lady”, established that Quagmire is 61 years old, he is still barred from purchasing alcohol in “Underage Peter” when the legal drinking age is raised to 50.
57	** In the season 18 episode "Short Cuts", Brian is getting neutered. However, in the season 4 episode "Blind Ambition", he had already been neutered.
58	** In the season 19 episode "[[Recap/FamilyGuyS19E1StewiesFirstWord Stewie's First Word]]", the Griffin family (sans Brian) treat Stewie's "first word (an f-bomb)" as if they never heard him speak before, even though Chris regularly interacted with him in later seasons, and there were countless gags of the parents understanding bits and pieces from him.
59	** In the season 19 episode "Boys & Squirrels", Chris claims to be a paperboy, a job he hasn't had since season 6's "Movin' Out (Brian's Song)", where he gets a job at the Quahog Mini-Mart.
60	* ''WesternAnimation/FanboyAndChumChum'': The Season 2 ChristmasEpisode "A Very Brrr-y Icemas" has the characters celebrate [[YouMeanXmas an ice-themed variation of Christmas]] with Man-Arctica as the SantaClaus. However, Christmas was mentioned before in two season 1 episodes (in "Night Morning" when Yo mentions Santa Claus, and in "Eyes on the Prize" when Fanboy actually mentions Christmas by name when he says buying Man-Arcticrunch is like such but with cereal).
61	* ''WesternAnimation/{{Futurama}}''
62	** In season 4, it is established that talking about ''Franchise/StarTrek'' is illegal, although numerous references to it were made in the first three seasons, including a fictitious movie that was ''nominated for an Oscar'' for Best Product Placement (and on top of that, Creator/LeonardNimoy from the original ''Star Trek'' series is in the celebrity head museum[[note]]while his other cast mates were sent off into space. In "Where No Fan Has Gone Before", Nimoy stated that he stayed because he had a six-month lease on his apartment and couldn't turn down the offer[[/note]]. In the first episode, he was a greeter, but in "Where No Fan Has Gone Before", Nimoy is now on one of the main shelves). {{Lampshade\|Hanging}}d on the DVD commentary.
63	--->"''They never said 'Star Trek', they said 'Start Wreck!'''"
64	** In the pilot, Bender claims that "I don't need to drink, I can stop anytime I want!" This contradicts the fact that robots in ''Futurama'' are powered by alcohol, established in episode three, "I, Roommate". Later episodes would establish alternate fuel sources like mineral oil and efficient synthetic fuels as being possible.
65	** In season 3, the professor specifies that there exist only two parallel universes (the other one seems to be the same as this one, except that everyone wears cowboy hats). In season 4, an entire episode revolves around jumping through multiple parallel universes. But perhaps one can argue that the professor's machine had created all of those universes, rather than just a gateway to them. {{Word of God}} {{Hand Wave}}d this by saying that the cowboy universe was really the only parallel universe and the others were ''[[{{Pun}} perpendicular]]'' universes.
66	** Bender has mentioned being able to remember his own "birth." In season 6, it is revealed that Bender doesn't remember the inspector who approved him on the assembly line, and spends the episode trying to find out who they were.
67	** The circumstances of Bender's birth change drastically DependingOnTheWriter. In the episode where he recounts his birth, it was shown that he was built in a robot factory in Mexico, looking exactly the same as he does in the present day. In another episode, where the cast turns into babies, Bender slowly de-upgrades along with everyone else, shrinking with each successive step. On top of that, he mentions he's only five years old, yet he shrinks with everyone else in the aforementioned episode. If he really was five years old, he would have disappeared in the goo and never came out (since everyone gets around half a decade younger almost instantly), much like one of the buds on Zoidberg's body. Further muddying things is that Bender's head is over a thousand years old at this point, having spent centuries buried after the events of ''Roswell That Ends Well''.
68	** In the season 6 episode "Lethal Inspection", Bender discovers that he was built without a backup unit that would download a copy of his programming (i.e., his "soul") onto another robot body. Yet in the later episode "Ghost in the Machines", Bender dies and becomes a ghost.
69	** "Viva Mars Vegas" is rife with this:
70	*** The gang goes to Mars Vegas, even though Mars was destroyed in "A Farewell to Arms."
71	*** The Native Martians are depicted as workers at the casino, even though they abandoned the planet in "Where the Buggalo Roam", which was pointed out ''twice'' in ''Into the Wild Blue Yonder'' and "A Farewell to Arms".
72	** Amy’s parents apparently have never met Kif, despite the fact that in “A Flight to Remember”, they're the reason the two met in the first place.
73	** In "T: The Terrestrial", Fry acts amazed at seeing Lrrr’s palace as if it was the first time he saw it, but he had been there before in "Spanish Fry".
74	** Roberto is killed off in "The Six Million Dollar Mon" after he eats a piece of Hermes' skin, causing him to melt and destroying his brain chip. However, "Stench and Stenchibility" has Roberto show up alive and well to rob Zoidberg and Marianne without any explanation. In "How The West Was 1010001", he shows up alive again and even plays a major role in the plot, so it can be assumed his death was entirely retconned (perhaps via backup personality).
75	** In "The Six Million Dollar Mon", Zoidberg revealed that he has been dating a girl named Zindy for four years, even though the episode "Benderama" from two seasons earlier shows that he owns (or owned) a wedding album.
76	** "Yo Leela Leela" has a joke where the announcer for the Young People's Choice Awards claims the ceremony is Leela's second time in high heels for a gag where she stumbles getting onstage. Many of her previous formal outfits have high heels, and she never had problems with them then.
77	** "The Impossible Stream" shows Slurms Mackenzie advertising Slurm Zero in a commercial, even though he died in a HeroicSacrifice in "Fry and the Slurm Factory." For reasons unknown (possibly due to implied old age), Mackenzie is also shown to be shriveled up and coughing at the end of the commercial.[[note]]The tie-in game ''Worlds of Tomorrow'' did imply there are multiple Slurms [=MacKenzie=]s to justify one showing up in that game, but that game is defunct and of dubious continuity.[[/note]]
78	** "The Impossible Stream" has an ExplodingCalendar montage that suggests Fry stays in the still-suit all the way into 3024, with the crew noting he's been streaming for months (the episode begins in July 3023). The rest of the season contradicts this by explicitly showing events that still take place in 3023, including "Children of a Lesser Bog" (which ''directly follows'' "The Impossible Stream"), "I Know What You Did Next Xmas," and "Rage Against the Vaccine."
79	** It's a plot point in "Parasites Regained" that Nibbler cannot poop outside of his litterbox and therefore cannot avoid reinfection by the worms, except he did just that in "The Why Of Fry".
80	** Zoidberg claims in "I Know What You Did Last X-Mas" that he has no family because his species dies when they reproduce. While this does not contradict “Why Must I Be A Crustacean In Love”, it does contradict "That’s Lobstertainmenent!" as it is shown that Zoidberg does have a family member who is still alive, Harold Zoid.
81	** "Rage Against The Vaccine" has Lrrr and Ndnd use their own son Jrrr as a pawn in sending misinformation on social media to Earth from Omicron Persei 8. This should not be possible, due to "T: The Terrestrial" having Nixon clamp an embargo on Omicron Persei 8 and cut off all communication with them, including TV and online messaging. Either that embargo was lifted between 3013 and 3023, or it had become very poorly enforced. Not helping matters is that at the end of the episode, Lrrr and Ndnd receive free Explovid vaccinations from Hermes without trouble after contracting the virus.
82	** Leela acts amazed at seeing the Nimbus in "Zapp Gets Cancelled" and compares it to a “Princess cruise ship with laser cannons”. The problem with Leela's reaction to the Nimbus in this scene is that she had not only seen the ship several times, but was also on it in several prior episodes, including "Love's Labour's Lost in Space", "Kif Gets Knocked Up a Notch", and "Zapp Dingbat."
83	* ''WesternAnimation/GoofTroop''
84	** In spite of the fact that it is established that Goofy hadn't seen Pete or Peg since graduation, and that Max and PJ only met at the age of twelve, after Goofy returned to Spoonerville and moved in next door to the Petes, several episodes make references to Max growing up in Spoonerville. And in the Christmas special, Pete declares that every year Goofy wrecks stuff, but this could easily be explained as happening the years before Goofy moved away.
85	** Not only that, but the episode "Have Yourself a Goofy Christmas" ("A Very Goofy Christmas") from the movie "Mickey's Once Upon A Christmas", which is said to chronologically precede the cartoon series, while featuring Goofy, Max and Pete as next-door neighbours, they live in two very different houses in a very different suburb than the houses and suburb featured in the series or in the movie (both the series and the movie feature different houses and suburb). And Max appears to be 5 years old at the time and Pete's wife and kids are nowhere to be found. And nothing implies Pete has a wife and kids, which he ought to have. One has to wonder how Goofy and Max ended up living from a suburban house to a trailer and then back to a suburban house again. Though it's possible that "A Very Goofy Christmas" may not be in the same continuity as Goof Troop.
86	** According to Episode 15 "Wrecks, Lies & Videotape", Goofy never had a decent vacation in his life. The movie averts this as it's revealed that Goofy's recent past generations took their sons fishing, by taking them across the country to Lake Destiny. Goofy appears to have lots of money as to not only take Max across the country and back, but to go to a carnival, fancy hotels or motels, buy somewhat expensive food, visit a cave, go to a baseball game and lots of other stuff all while traveling across the country.
87	** In "Educating Goofy", Goofy has not finished grade school. But in "An Extremely Goofy Movie", he had gone to college for three years back in TheSeventies, and just not finished it. "Educating Goofy" appears to be an anomaly in this regard, as several other episodes (including the pilot) allude to Goofy in high school.
88	** A milder example is that in "Goofs of a Feather", PJ wonders how he's going to face his "friends" now that his dad's a "duck-killer". In "Goodbye, Mr. Goofy" PJ reveals that Max is the only friend he's ever had, which, considering his [[ShrinkingViolet personality]] and how he behaved in "Good Neighbor Goof", is probably true (and Max ''knows'' that Pete is a {{Jerkass}} and that PJ [[NiceGuy isn't]]).
89	** Pistol is portrayed inconsistently in regards to age (four, five, and six have all been stated) and grade (kindergarten and preschool have both been stated). The sexes of the family pets are also portrayed inconsistently, though generally speaking Waffles is male and Chainsaw is female.
90	* ''WesternAnimation/TheGrimAdventuresOfBillyAndMandy''
91	** Grim 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 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]] {{Childhood Friend}}s 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.
92	** In the pilot episode, "Meet the Reaper", Grim came for Billy's hamster because the hamster turned 10. In "Billy and Mandy Begins", Mandy says that the hamster was 8 when Grim came for it.
93	** In "Smarten Up!", Billy interrupts Bookworm!Milkshakes' math problem involving a train to ask if the train can be filled with clowns named Carl, Larry, and Tim, and in "Substitute Creature", he doodles a picture of a clown with a flamethrower on his test paper. Later episodes and the first movie would establish that Billy is afraid of clowns to a comical degree, making his previous actions seem odd in retrospect.
94	** In the end credits of "[[ChristmasEpisode Billy & Mandy Save Christmas]]", Billy says that his family celebrates Hanukkah, but he mentions celebrating Christmas on two other occasions.
95	* 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 on, 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''?
96	** Solved in the last episode, where Hades, Hercules, and a teenage Megara are doused in amnesia-inducing River Lethe water.
97	* ''WesternAnimation/HeyArnold'': Harold has a bar mitzvah in, well, "Harold's Bar Mitzvah", indicating that he's thirteen years old. This is backed up in "Hey Harold!" where he explains to Patty that he was HeldBackInSchool, which is why he's in fourth grade. In "Helga on the Couch", he's in preschool with Arnold, Helga and the rest of the kids. Unless Harold somehow failed preschool multiple times, this is problematic.
98	* ''WesternAnimation/{{Jem}}'':
99	** In "Out of the Past", Jerrica and the others find old records of their deceased mother in the attic. This is despite the fact the first few episodes showed that the original Starlight House was bombed by Zipper.
100	** It's mentioned early in season 3 that Riot met Minx while in high school in Germany. In Riot's ADayInTheLimelight episode a few episodes later, we learn that Riot didn't go to Germany until he enrolled in the army. He met Minx ''after'' he was already in the army and saw her in a rock band. It's not specifically mentioned that Riot didn't live in Germany at one point so it's technically possible to coincide the two, but "Riot's Hope" implies he stayed in America until he enrolled in the military.
101	* ''WesternAnimation/KimPossible'':
102	** The episode "Showdown at the Crooked D" explicitly takes place during the summer, but it must after Kim and Ron's junior high school year (because it refers to one of their adventures that took place at the beginning of their junior year). However, it simultaneously can't take place during the summer between their junior and senior year, because following the events of ''WesternAnimation/KimPossibleMovieSoTheDrama'', [[spoiler:Drakken and Shego are in prison and don't break out until during season four]].
103	** In the 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" and one was from "Sick Day". Odd she'd flash back to those events, as she '''wasn't even at them'''.
104	* ''WesternAnimation/KingOfTheHill''
105	** The episode "Life: A Loser's Manual" is chock full of them. First of all, in the very first episode, Luanne is eighteen years old and she has just moved into the Hill's home after her mom stabbed her father with a fork. In a later episode "Luanne Gets Lucky", she claimed she was sixteen when the event happened and had to miss her prom because of it, and yet in the first episode mentioned her dad said she was just a little girl the last time he seen her and Luanne seems to have no memory of the event despite the previous episode taking place one season earlier. Later on, Hank mentioned that he had never met Peggy's brother despite in earlier episodes he mentions what a great man he was and how he enjoyed his company, and last of all in earlier episodes Hoyt Platter was said to be a small, timid, nerdy man who looked like a male version of Peggy and ran off because his wife Leanne was abusive to him, yet in this episode he is depicted as a morbidly obese man who looks nothing like Peggy, is a total {{jerkass}}, and he mentions that he ran off because of a drug addiction and the possibility that he'll be in jail for the rest of his life if he commits one more crime (which he tries to cover up from Luanne as "working in an oil rig").
106	** Several early episodes imply that Hank and Peggy have a friendly relationship with Luanne's mother, but when she actually shows up, this is not the case.
107	** Another episode dealt with Peggy not having spoken to her mother in twenty years and having to save her mother's ranch from being taken down; however, in a much earlier episode, Peggy's mom had a completely different appearance and personality, a fine relationship with her daughter, and not owning a ranch.
108	** Even worse than that, early episodes have Peggy and Hank as high school sweethearts from rival schools and implies that Peggy's family lived in Texas for a decent amount of time yet the above mentioned ranch episode says Peggy grew up on the ranch in Montana.
109	** In a season 13 episode, Cotton tells Hank, via audio recording, to flush his cremated ashes down the same bar toilet that General Patton used before pursuing Pancho Villa and the same toilet the rest of Cotton's dead war buddies were flushed, but in a season 4 episode, Cotton fought with Peggy's help to be buried in a Texas government cemetery, and succeeded. Though given Cotton's {{jerkass}} nature it could just be one more screw you to Hank.
110	*** The same episode has Cotton implore Hank to pay a visit to the French woman he made love with in France, even though "Cotton's Plot" established that he'd only ever fought in Japan. In fact, a major plot point in the latter episode was the revelation that Cotton was misremembering a lot of his supposed wartime experiences.
111	** An episode of ''WesternAnimation/TheSimpsons'' had Hank Hill appear. This doesn't exactly contradict ''WesternAnimation/KingOfTheHill'', but it contradicts WordOfGod which says that these shows don't exist in the same universe.
112	* In ''[[WesternAnimation/TheLittleMermaid1992 The Little Mermaid: The Series]]'', Ariel encounters Ursula several times even though it's set before [[WesternAnimation/TheLittleMermaid1989 the movie]], where they meet for the first time.
113	* ''WesternAnimation/MarthaSpeaks'':
114	** In the flashback of "Martha Blah Blah", Martha had to ask to be let out due to the doggy door not being at the back door yet, even though it has been present in the first episode.
115	** In "Ain't Nothing But a Pound Dog", Pops was originally a junkyard dog but his owner left him behind and he was eventually adopted by Kazuo. In a later episode, "Martha's Thanksgiving", Pops was already shown at the animal shelter.
116	* ''WesternAnimation/MollyOfDenali'': In "[[Recap/MollyOfDenaliS1E34PuppyPalooza Puppy Palooza]]," Molly named Tooey's lead puppy Kih Dihdii, meaning "first one," and the spelling was shown on Kih's doghouse. But in "[[Recap/MollyOfDenaliS2E1MouseTreehouseLeaderOfThePack Leader of the Pack]]," the pup's name is spelled Khi on Tooey's training chart.
117	* ''WesternAnimation/MyLittlePonyFriendshipIsMagic'':
118	** In "[[Recap/MyLittlePonyFriendshipIsMagicS1E1MareInTheMoon Mare in the Moon]]", when Nightmare Moon escapes from her 1000 year imprisonment and reveals herself, nobody in Ponyville knows who she is except for Twilight Sparkle, who read about her in history and myth books. Later, the episode "[[Recap/MyLittlePonyFriendshipIsMagicS2E4LunaEclipsed Luna Eclipsed]]" establishes a holiday called Nightmare Night (similar to Halloween) that has been around ever since Nightmare Moon was first imprisoned and was created in her honor.
119	** In "[[Recap/MyLittlePonyFriendshipIsMagicS1E11WinterWrapUp Winter Wrap Up]]", Twilight Sparkle implies Ponyville has been around for hundreds of years. In "[[Recap/MyLittlePonyFriendshipIsMagicS2E11FamilyAppreciationDay Family Appreciation Day]]", Ponyville was founded by Granny Smith's parents when she was a child, and there's no indication in the show that ponies (excluding the princesses) have abnormally long lifespans, implying that Ponyville is less than a hundred years old. The only possible explanations are that Twilight simply meant Earth Ponies as a ''whole'' have done Winter Wrap Up without magic for hundreds of years prior to the founding of Ponyville, or that Granny Smith was lying her ass off.
120	** "[[Recap/MyLittlePonyFriendshipIsMagicS4E4DaringDont Daring Don't]]" features Ahuizotl attempting to perform a magic ritual which will bring 800 years of intense heat to the jungle (and working with Caballeron to obtain the ring he needs for said ritual), with Daring Do and Rainbow Dash putting a stop to it. Several seasons later, "[[Recap/MyLittlePonyFriendshipIsMagicS9E21DaringDoubt Daring Doubt]]" has him reveal that he is a guardian assigned to protect the Tenochtitlan jungle and the historical relics contained therein, and that his supposedly villainous behavior is the result of him being in danger of losing his job if Daring Do and Caballeron keep swiping artifacts from his territory. No particular explanation is provided for how this motivation and his original climate-manipulating plot are supposed to coexist.
121	** "[[Recap/MyLittlePonyFriendshipIsMagicS0E4StarlightTheHypnotist Starlight the Hypnotist]]" has Twilight Sparkle so terrified of ladybugs that just mentioning one is enough to send her into a panic due to some "[[NoodleIncident incident]]" between her and her brother. This is in spite of her actually having seen ladybugs in the past without incident .%%"Ladybugs awake" isn't an example per https://derpibooru.org/1966512
122	* ''Franchise/MyLittlePonyGeneration5'':
123	** [[PaintingTheFrostOnWindows Nature being finely controlled by ponies]] is a major element in Generation 4, with ponies using magic to control the weather, plant growth, the day-night cycle and so on, and it's established at multiple points that these things don't work without someone making them. In Generation 5, despite magic having vanished for generations, all these things continue to function without explanation.
124	** G4's cutie marks also magic-reliant -- they usually vanish if a character's magic is removed -- and appear on both flanks. In G5, they continue to appear without magic but also only turn up on one flank; no particular reason is given for either change.
125	** The ''Friendship is Magic'' episode "[[Recap/MyLittlePonyFriendshipIsMagicS8E11MoltDown Molt Down]]" established that dragons get their wings at puberty. In the first ''[[Recap/MyLittlePonyMakeYourMarkSpecial Make Your Mark]]'' special, Sparky the dragon is born with wings. To date, no explanation for that has been offered.
126	* ''WesternAnimation/PeterPanAndThePirates'': In the Season 1 episode "Slightly In Stone" the gang finds Captain Hook's severed skeletal hand clutching his sword in the crocodile's cave, however in the Season 2 episode "First Encounter" Peter took Hook's sword from him to cut off his hand.
127	* ''WesternAnimation/PhineasAndFerb'': In the episode "Rollercoaster: The Musical", the two future Candaces from "Phineas and Ferb's Quantum Boogaloo!" make a cameo appearance. However, it was established in "Quantum Boogaloo" that the Candaces were going back to the first day of summer, which would have been the first rollercoaster episode instead of the musical one.
128	* ''WesternAnimation/PoundPuppies2010'': In the episode "A Nightmare On Pound Street", the Mayor adopts a dog for his kids, remarking that the [[UglyCute "cute ugly"]] dog [=McLeish=] "gave" them reminded him of one he had as a child. In "Squawk", the Mayor says he needs a pet to give him an advantage with the animal lovers of the city, and, after [=McLeish=] asking if he wants to adopt a dog, brings out a parrot. The Mayor later reveals he only adopted the parrot to harbor votes, ''doesn't really like animals, and calls pets and animals in general "dumb"''.
129	* ''Franchise/ThePowerpuffGirls'':
130	** In an early episode of the 2016 series, Mojo Jojo calls his mother. He was raised by the Professor, and presumably his mother (if he even knows her whereabouts) is a normal, non-talking chimp.
131	** In the original series, Bubbles was sometimes depicted as vegetarian. This is despite her regularly eating meat without issue, including the RunningGag where the Professor makes the girls liver and onions.
132	* In ''WesternAnimation/TheRaccoons'', certain episodes (especially "Making the Grade") depict the raccoons and Cedric all knowing each other since grade school. However, in "The Sky's the Limit," Ralph and Melissa's first meeting is explained, and presumably took place (over a spilled cup of coffee) when they were adults. Furthermore, the raccoons don't act like Cedric's an old friend in ''Recap/TheChristmasRaccoons''. The former might be passable if you reason that everybody did know everyone when they were children, but went their separate ways after school. The coffee story could be talking about how Ralph and Melissa met up again as adults. And since TCR was "just a dream," well, maybe Schaeffer just has a bad habit of dreaming his friends in random stories where they don't know each other.
133	* The 2009 version of ''WesternAnimation/RainbowBrite'' has Wisp returning to Earth to be with her family. The problem is Wisp is ConvenientlyAnOrphan and showed no signs previously of having any extended, adopted, or fostered family.
134	* ''WesternAnimation/ReadyJetGo'': In "Round and Round", Mindy portrayed the sun and saw how all the planets orbit around it. But in "Galileo, Galileo!", she legitimately believes that the sun orbits the Earth.
135	* ''WesternAnimation/{{Recess}}''
136	** The VagueAge of Cornchip Girl. She appears to be in first or second grade, but spends most of her time with the kindergarteners, and during the PictureDay episode, she's not shown among the crowds having her picture taken.
137	** Gus is the new kid in school in fourth grade, yet somehow also appears in kindergarten, and also seems to be attending school at the time of the Great Jungle Gym standoff (this can be attributed to an animation goof, since he doesn't have any lines). This is addressed in one of the later episodes. Apparently, he ''did'' spend some time in the same kindergarten as the others, but being little children, they had forgotten.
138	** The Ashleys are shown to be in another class in the "Can Drive" episode -- yet several other episodes show them sitting in the ''exact same class'' as the main gang.
139	** In "Parent's Night," Spinelli's mom [[AmazinglyEmbarrassingParents embarrasses her]] by revealing that she has a crush on T.J. in front of her friends. But in "That Stinking Feeling," her crush on Johnny V. is treated as her first crush.
140	** In the Great Jungle Gym standoff, T.J. mentions his big brother. TheMovie reveals he has a big sister. Although it ''is'' possible that he has another much older brother, who has either moved out, or is in college.
141	* ''WesternAnimation/RegularShow'':
142	** In "Eggscellent", it was established that Rigby is violently allergic to eggs and he ended up hospitalized when he attempted to eat a giant omelet. If this were the case, then him previously eating a carton of them ''raw'' in the first "[[HalloweenEpisode Terror Tales of the Park]]" should've had even worse repercussions.
143	** Speaking of "Eggscellent", Johnathan Kimble is clearly shown to have died after picking the wrong hat after successfully eating the omelette. Despite this, he is briefly shown in the mob of people making fun of the crew's stupid uniforms in "Men in Uniform".
144	** It's been established on multiple occasions that Mordecai finished high school and went on to art school while Rigby dropped out, but in TheMovie they're both expelled in their senior year.
145	* In her first episode in ''WesternAnimation/TheReplacements'', Celebrity Star is arranged as Shelton's girlfriend, because she likes out-of-shape, whiny nerds like him. She proves too clingy and oppressive for him... and finally dumps him when he proves to be a middle-school hunk without his glasses. Her next appearance has her making a movie intended to ruin ''his'' reputation for dumping ''her''.
146	* ''WesternAnimation/RichieRich1980'': In "Voodoo Island", a second-season Zillion-Dollar Adventure, Gloria Glad tells Richie she can't swim. Yet in the first season, she was seen swimming in the Treasure Chest segment "Young Irona", and in the ZDA "One of Our Aircraft Carriers Is Missing".
147	* ''WesternAnimation/RockosModernLife'':
148	** [[WordOfGod Joe Murray has said]] that any flashback contradicting another flashback is just the result of people misremembering or exaggerating things, much like in {{real life}}. Thus, Filburt remembering being in high school with Rocko, in spite of Rocko having just moved to the States recently, is just Filburt misremembering.
149	** There's also the matter of Heffer's "death" in "To Heck and Back". While the episode in question was AllJustADream, Heffer himself had off-handedly mentioned his death to Filburt in "She's the Toad" as if it actually happened. Really Really Big Man also used Rocko trying to get a chicken bone out of Heffer's throat (the cause of the death) to say why Rocko was bigger when he was small in "Short Story". While the former can be excused because this is [[TheDitz Heffer]] we're talking about, the latter was especially JustForFun/{{egregious}} considering this was a part of Rocko's dream (though Heffer may have told him about it offscreen).
150	* ''WesternAnimation/{{Rugrats}}'':
151	** In "The Seven Voyages of Cynthia", Angelica says that her doll Cynthia was a gift for her third birthday. In the later episode "Angelica's Birthday", [[AgelessBirthdayEpisode her age is never mentioned]], but presumably it should be her fourth. Yet all further episodes still give her age as three.
152	** Several early episodes had passing references to Chuckie's mother, both from the adults and from Chuckie himself, implying that she was still around, just offscreen. Later episodes made it clear that Chaz was a single father, and by the time his wife was finally revealed to have died, Chuckie was portrayed as having no memory of her.
153	** In "Showdown at Teeter-Totter Gulch", Chuckie says that Tommy was eight days old when they first met. In the flashbacks showing how all the babies first met in the later episode "Moving Away", Tommy, Phil and Lil look just the same as they do in the present and are already walking, clearly not newborns.
154	** In "Chuckie's Complaint" the babies (except Dil) start crying and are taken to the mall bathroom to get their diapers changed, including Chuckie. However, Chuckie was already potty trained as of "Chuckie Vs. The Potty". And Dil appears, so it doesn't take place before that episode.
155	** In "A Tale of Two Puppies", Chuckie is shown to be scared of pillbugs, even though he had one as a pet in "I Remember Melville".
156	* ''WesternAnimation/SagwaTheChineseSiameseCat'' has two in the episode "Sagwa's Lucky Bat". The first is that they are just discovering the clubhouse despite it appearing and being mentioned earlier. The second is that a flashback in the episode shows Sheegwa was around and old enough to talk in full sentences before Sagwa got her ink markings, despite the first episode implying the incident took place before or directly after her birth (the episode itself is rather conflicting about which).
157	* ''WesternAnimation/SamuraiJack'': In the season 5 reboot, Jack slices the throat open of one of the Daughters of Aku and is horrified when he realizes he has killed another human (as Aku had only sent machines and supernatural entities after him prior to this, he had supposedly avoided killing any humans up to this point). However, he actually did face several human bounty hunters in "The Princess and the Bounty Hunters" with the episode in question indicating he killed them without issue. [[WordOfGod Series Creator Genndy Tartakovsky]] claimed that the canonical explanation is [[HandWave they were all either not human or didn't die after all]], but admitted to having completely forgotten about the episode in question when he wrote season 5.
158	* Since listing ''all'' of ''WesternAnimation/TheSimpsons'' series continuity errors would be a Herculean task, we'll just stick to the most egregious examples.
159	** "Lisa's First Word" has the family anticipate hearing Maggie's first spoken word, becoming a RunningGag that Maggie [[TheVoiceless rarely speaks]] onscreen or around others. Maggie clearly says "good night" to Homer in the first ''Series/TheTraceyUllmanShow'' short, "Good Night", though events in the shorts may not have [[CanonDiscontinuity happened]].
160	** Also, the street address of the Simpsons' house. From the very first time the address was brought up (the episode "Blood Feud"), it was Evergreen Terrace. However, the house number was 94 rather than 742. Subsequent references are inconsistent on the number, and "Kamp Krusty" even gives the street as Spalding Way. "Marge in Chains" finally establishes the address as 742 Evergreen Terrace, though it briefly went into relapse in "Homer the Vigilante" by giving the house number as 723. Interestingly enough, the address "742 Evergreen Terrace" was originally given to Snake's cattle rustling shack.
161	** The WholeEpisodeFlashback "And Maggie Makes Three" reveals that Homer had to renounce his dream job at the Bowl-A-Rama and return to his position as safety inspector in Burns's power plant when Maggie was born. This contradicts Season 1 "Homer's Odyssey", where Homer was a technical supervisor before being fired and rehired as a safety inspector (and he already had three children, obviously).
162	** Also in "And Maggie Makes Three," Homer's reactions to Marge being pregnant (yelling "You're pregnant!" and "You're pregnant again!" while ripping his hair out and running screaming from the room) were ''WAY'' different than what was depicted in "I Married Marge" (from season three) and "Lisa's First Word" (from season four). In "I Married Marge," Homer found out Marge was pregnant when she called him from her job as a skating waitress at a diner and Homer squeezed his tube of cookie dough (which he was eating with Barney while the two were watching ''Charlie's Angels'') in shock and when Dr. Hibbert confirmed it with, "Well, Miss Bouvier, I think we found out the reason why you've been throwing up in the morning. Congratulations, Mr. Simpson," Homer yelled, "D'OH!" so loud that a man in traction commented on it. In "Lisa's First Word," Marge told Homer outright that she was going to have another baby (after Homer wrongfully guessed that he and Marge were going to start having sex in the morning) and Homer was ecstatic -- until Bart flushed his car keys down the toilet.
163	** Aside from that, the above scenes of Homer ripping his hair out take place in the Simpsons' current house, which they didn't move into until Marge was pregnant with Lisa. Even more egregious, every time Homer runs around screaming and ripping out his hair, he runs past family portraits showing his kids at their current ages (10 year old Bart, 8 year old Lisa, infant Maggie.)
164	** "The War of the Simpsons", a second-season episode, has a flashback of Bart as a baby driving the car in front of their current house.
165	** In "Homer Simpson in: Kidney Trouble" (season 10), it's implied that Grampa has (or rather, had, thanks to a "kidney blowout") two kidneys. In the season 2 episode "Old Money," Grampa told Bea (his short-lived girlfriend) that he only had one kidney.
166	** While Lindsey Naegle does change jobs surprisingly often (due to the fact that she's a sexual predator), it seems rather odd that she's been shown as a leading member of Springfield's Republican ''and'' Democratic Parties in separate episodes.
167	** In "Much Apu About Nothing" Abe reveals himself to be an immigrant, who came over from Europe with his parents. Many seasons later, "The Color Yellow" establishes that the Simpsons have been living in America since at least the antebellum era. Like anything involving Grandpa, this can be handwaved with, as he might put it, "the senility talking."
168	*** Out of these two, "Much Apu About Nothing" seems more plausible because "The Color Yellow" contradicts ''[[https://simpsons.fandom.com/wiki/The_Simpsons_Uncensored_Family_Album The Simpsons Uncensored Family Album]]'' from 1991, which shows a detailed family tree of the Simpson family on the inside of the front cover, and characters like Abraham I and Virgil from the episode are nowhere to be seen on it.
169	** In the ClipShow "All Singing, All Dancing," the anti-musical Bart claims that saving Santa's Little Helper's puppies from Mr. Burns in "Two Dozen and One Greyhounds" wasn't worth Burns' "See My Vest" musical number, despite claiming in the earlier episode that it was "kinda catchy" and humming along to the tune.
170	** In "Lisa the Simpson", it's revealed that the men in the Simpson family get dumber as they get older while the Simpson women remain smart. There are a couple things wrong with this:
171	*** Homer's half-brother Herb (voiced by Creator/DannyDeVito) apparently is immune from this (or [[ChuckCunninghamSyndrome 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).
172	*** In a later episode, Herb briefly mentions that he's "poor again" so maybe the genes did catch up with him eventually.
173	*** Added to that, Homer is later revealed to have a half-sister who is dumber than him in a completely unrelated episode.
174	*** The season 12 episode "HOMR" contradicted the "gene" theory by revealing that Homer is actually is naturally smart (or at least of average intelligence), but has simply been dumb ever since he shoved a bunch of crayons up his nose as a child and one got lodged in his brain.
175	*** Grampa Simpson: it's been shown that he was a strong, competent military officer during World War II (then again, the season four episode "Lisa's First Word" revealed that he really doesn't know anything and got by in life on his looks until they withered away like an old piece of fruit, and that he bought his house by naming names during the 1950s Quiz Show scandals).
176	** In the season 10 episode "Viva Ned Flanders" (first aired in 1999), Ned Flanders reveals that he's really 60 years old, with his youthfulness attributed to an extremely straight-edge lifestyle (or as he calls it, the three C's: "Clean living, Chewing thoroughly, and a daily dose of vitamin Church"). However, previous episodes, most notably "Hurricane Neddy", had shown he was a child in TheFifties with {{Beatnik}} parents, which would put him in his early 50s at most. Assuming the episode is set in the year it aired (1999) that makes sense, but due to the FloatingTimeline, he actually would be in his 60s or even ''70s'' now.
177	** The FloatingTimeline causes endless continuity problems for the series the longer it progresses, given earlier writers clearly did not anticipate the show lasting for as many decades as it did. Many earlier episodes explicitly place important events in the Simpsons' lives as occurring in specific calendar years (or decades) that are then inevitably contradicted when the show lasts well beyond this era, and the never-aging nature of the characters makes these earlier episodes seem impossible.
178	*** "Lisa's First Word" depicts Lisa as being born around the time of the 1984 summer Olympics, which are a significant backdrop to the episode. Subsequent episodes, particularly "That 90's Show" (see below) portray Homer and Marge as not even married by then. Bart and Lisa are also generally unfamiliar with whatever dated technology, pop culture trends, etc. children of their current decade would lack knowledge of, even if they directly interacted with it in previous episodes. One glaring example: Bart is depicted as being an avid fan of Michael Jackson in a 1991 episode, only to later believe Michael Jackson is some scary monster adults made up to scare children in a 1995 one.
179	*** The episode "Angry Dad: The Movie" was a big reference to the original "Angry Dad" show that Bart had created several years earlier.. It doesn't make any sense though. For one, the episode takes place in 2011, and they explicitly state that Bart invented "Angry Dad" in the ''90s''. Due to the floating timeline, this Bart means Bart would have to have been born in TheNoughties, and thus younger than ten when he created it in the original Angry Dad episode.
180	*** "That '90s Show" from Season 17 tried to provide a more modern reboot of the characters' pasts, but only succeeded in creating a whole mess of continuity errors. It practically erases anything that happened prior to Season 10 or so by saying that Homer and Marge didn't have kids in the '90s. "The Way We Was", the episode where Homer and Marge meet from all the way back in Season 2, is explicitly set in 1974. That means Marge and Homer took more than 20 years to get married.
181	** In "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 in the Vietnam War. 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 in World War II, who is implied to be Skinner's father and physically resembles (and has the same voice as) Tamzarian/Skinner rather than the "real" Skinner.
182	** In "Saddlesore Galactica", Todd is at Springfield Elementary, though he is home schooled.
183	** In "Teenage Mutant Milk-Caused Hurdles", Marge says a week ago, Lisa would have never worn makeup, though Lisa has previously worn makeup, including the preceding episode.
184	** Homer has stated at least once that he never wanted children. This is despite earlier flashbacks showing him excited at Marge being pregnant with his kids.
185	** In "Replaceable You", Mrs. Glick (the elderly lady Bart does chores for in "Three Men and a Comic Book") dies. However, she's occasionally seen alive and no worse for wear in subsequent episodes.
186	** In "New Kid on the Block," the Winfields (the Simpsons' ''other'' next-door neighbors in early episodes) moved out of their house. While they never appeared again for the ''most'' part, they made cameos in "Lisa the Iconoclast" despite no longer living in Springfield.
187	** "Fear of Flying" (series 6) deals with Marge suffering from the eponymous phobia. She flies to Washington DC in "Mr Lisa Goes to Washington" (series 3) without incident.
188	** "Pin Gal" has Homer finding out about Marge's brief fling with Jacques, despite Marge already telling the family about it in "Another Simpsons Clip Show". The episode also depicts Jacques as a genuine Frenchman despite "Life on the Fast Lane" hinting he was a phony, as he briefly dropped the accent when ordering onion rings.
189	** "The Cartridge Family" centers around Homer buying a gun for the first time, even though previous episodes like "Radio Bart" and "$pringfield" established that he owned a shotgun and Marge had a police handgun in "The Springfield Connection".
190	* Although ''WesternAnimation/SkullIsland2023'' is supposed to be part of the Franchise/MonsterVerse, some of the pre-established and sustained [=MonsterVerse=] Skull Island lore is disrupted. For one thing, there's absolutely no sign nor mention of the PerpetualStorm, which encircles Skull Island and ensures anyone who finds it often ends up shipwrecked, with the island's invisibility to sensors instead being put down to magnetic anomalies. For another thing, the island's night sky is starry and clear, when in its other [=MonsterVerse=] appearances the night sky is dominated by a green aurora.
191	* ''WesternAnimation/SouthPark''
192	** In the episode "Cartman's Mom Is Still a Dirty Slut", Kenny comes back to life by magically reappearing and the characters (at least Kyle) are shown to be aware of this. In the episodes "Cartman Joins NAMBLA" and "Coon Vs. Coon And Friends" Kenny comes back to life by being reborn through his mother and the characters are unaware of him dying. RuleOfFunny doesn't work on this because NegativeContinuity was played ''seriously'' in CVCAF.
193	** A few episodes mention that Kyle's family moved to South Park when he was about three. In "It's A Jersey Thing," however, it's a plot point that they moved there while Sheila was pregnant with him. (Though Kyle only says that he was born "here," [[WildMassGuessing so maybe he meant somewhere else in Colorado]]?)
194	** There have been several examples of minor characters' names changing, and even more important secondary characters have inconsistent surnames. For example, Token Williams becomes Token Black and later Tolkien Black (although the latter is an InternalRetcon), Jimmy Swanson becomes Jimmy Valmer, Clyde Harris becomes Clyde Donovan, Annie Faulk becomes Annie Knitts and later Annie Nelson, etc.
195	** In "My Future Self 'n Me", one lyric in the song implies that Stan is clean while his "future self" [[spoiler:actually just a guy posing as Stan's future self]] isn't. In "Pee", we find out that Stan doesn't always wash his hands after going to the bathroom. Granted, the lyric in the previous episode may have meant in comparison, considering "Future Stan" is a JadedWashout.
196	** In "Proper Condom Use" (Season 5), Butters says that he's turning 9 next week. In "Cartman Sucks" (Season 11), he says he's still 8.
197	** Randy (a geologist) is mentioned as the only scientist in town, but later Token's mother is said to be a chemist, and Clyde's father a geologist. And later Clyde's father is not a geologist but a shoe store owner.
198	** Kenny is revealed to have a younger sister in "Best Friends Forever", when previously the [=McCormicks=] were stated to have two children. Matt Stone admitted that she was an oversight, and she didn't reappear for a while until "The Poor Kid". It has since been revealed that Kenny did have a younger sister in early plans for the series. She was meant to be around Ike's age, and was mentioned in an early script for "Starvin' Marvin" (though she did not make it into the final product).
199	** The episode "Butter's Bottom Bitch" (S13 E9) begins with Cartman and some of the other 4th grade boys making fun of Butters because he had never kissed a girl. In all actuality, Butters was kissed by Rebecca Cotswold in "Hooked on Monkey Phonics" (S3 E13); [[http://www.southparkstudios.com/clips/104019/dio Cartman and the other kids were witness to it.]] Even if the boys meant "actively kiss a girl" (considering Butters was caught off-guard by Rebecca) , then Cartman wouldn't be one to talk considering his kiss with Wendy in "Chef Goes Nanners" was also one-sided.
200	* ''WesternAnimation/SpongeBobSquarePants''
201	** An episode has Patrick being visited by his sister, Sam. The problem with this is that he said back in season 2's "Something Smells" that he did ''not'' have a sister. Then again, [[TheDitz this is Patrick we're talking about...]]
202	** In "The Krabby Patty That Ate Bikini Bottom", Mr. Krabs states that he doesn't need a water helmet while in Sandy's treedome because he can survive on land as long as his lungs are moist, yet he's shown wearing one in "Overbooked" and "Surf N' Turf".
203	** At the end of "Glove World R.I.P.", Glove World is reopened as Glove Universe, but it's back to Glove World in subsequent appearances.
204	** In "Born Again Krabs", Mr. Krabs insists on trying to serve a clearly inedible Krabby Patty and eventually eats it himself, and in "The Krusty Sponge", he sees no problem serving patties that had turned yellow due to not being kept frozen, yet he previously flipped out at the sight of what he thought was a spoiled patty in "Patty Hype" and tried to KillItWithFire.
205	** In "Cuddle E. Hugs", [=SpongeBob=] gets sick from eating an old Krabby Patty, when "Born Again Krabs" had him throw one out without a second thought.
206	** In "Can You Spare a Dime?", Mr. Krabs' first dime is depicted as being a crude stone wheel to imply that [[TimeAbyss he's been around since the Stone Age]]. In "Mutiny on the Krusty", [=SpongeBob=] threatens to destroy his first dime, which is now just a regular modern dime.
207	* ''WesternAnimation/StarVsTheForcesOfEvil'': In season 4's "Lake House Fever", Star is shown to have had a going away party with her friends before she went to Earth, even though in the first episode she left for Earth immediately after finding out she was going there, with no time for such a party to happen.
208	* ''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 ARC troopers Fives and Echo. The problem is that said photo, which could ''only'' have been taken during 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 [[spoiler:Echo dies... [[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 shown in Phase II armour in that season's seventh episode, [[Recap/StarWarsTheCloneWarsS4E7DarknessOnUmbara "Darkness on Umbara"]].
209	* ''WesternAnimation/ThomasAndFriends'' has this problem a lot in the early seasons due to the order of stories frequently being [[AdaptationInducedPlotHole changed from book to television]], which meant some story arcs were disrupted.
210	* ''WesternAnimation/StevenUniverseFuture'': Steven was 16-years-old in [[WesternAnimation/StevenUniverseTheMovie the movie]] that preceded this series. In said film, a poster for the Sadie Killer and the Suspects' concert states that the movie's events take place on May 21st. Steven's birthday is canonically on August 15th, but after winter passes during the course of the show, Steven is still said to be sixteen rather than seventeen. After seeing some of the discussion surrounding this confusion, one of the crew members revealed that the date on the poster was arbitrary; [[https://twitter.com/rnn_tweet/status/1241501102777892864 she did the rough design for that prop]] and just put down the date she originally drew it down.
211	* For the first 5 seasons of ''WesternAnimation/TotallySpies'', most continuity errors are animation-based: sometimes Jerry loses his mustache, sometimes Clover and Alex swap skin colors. Season 6, is still riddled with those continuity errors, but also a big bunch more which are story-based, perhaps due to new management from a new studio (or perhaps because this season is a SoftReboot):
212	** It was never clear ''when'' it takes place comparatively to season 5. At the end of season 5, Jerry's machine works and globally eliminates the evil gene, which results in the dissolution of WOOHP because there's no crime left to fight, which would be a nice end point for the show. Or maybe not, because the tearful farewell between the girls and Jerry is seemingly written off in season 6 as they resume their [=WOOHPing=] and crime fighting as if nothing had happened.
213	** Mindy, Mandy's cousin and the reason she goes to Mali-U instead of another college in season 5, was written off the show entirely. She was inexplicably replaced by Trent, a submissive intern who serves as Mandy's new sidekick.
214	** Despite still being college students like in season 5, the Spies shrink in height as they grow up for some reason. This is evidenced by the fact that all three of them are noticeably shorter than Clover's mother, which contradicts their heights compared to their mothers' in previous seasons.
215	** Clover's mother seems oblivious of her daughter's "secret" job as a WOOHP agent, which makes no sense because she, as well as Sam's and Alex's mothers, already knows that at the end of season 4 when they even become WOOHP agents themselves.
216	** Seth, a toy maker appearing in season 2, makes a reappearance in season 6, with a completely different backstory and personality. In season 2, he stole a military-grade microchip to make his toys more realistic not knowing they would become evil, so he tried to redeem himself by helping the Spies fight them, and only got to do community service thanks to that. In season 6, however, his full name is revealed to be Seth Toyman, and instead of naively having stolen a chip, he maliciously attacked the WOOHP mainframe which resulted in him being sent to prison, and now that he has been released, he comes back for the Spies for revenge.
217	** Alex's father appeared to be white in season 4, now changed to dark-skinned just like Alex with a ridiculous bowl cut to boot.
218	** Sam and Alex say they've never ice skated before, which they have in season 1 when they were in high school.
219	** They're oddly excited that they have spoken to the president, despite the fact that they have casually done so twice with him (or another president, maybe?) in earlier seasons.
220	* Just a few of the more famous ones from the ''Franchise/{{Transformers}}'' franchise:
221	** A total list of all instances in ''Franchise/TransformersGeneration1'' would fill a library, as continuity wasn't considered to be terribly important. Autobots fly! Now they don't! Surprise, I have [[NewPowersAsThePlotDemands a built-in tool]] to solve today's problem! [[ForgottenPhlebotinum Now I don't]]! However, there are a few that stick out more than most:
222	*** The six Constructicons. Their introduction in "Heavy Metal War" discusses the Decepticons building them in the caves they were in at the time. Omega Supreme's backstory[[note]]In "The Secret of Omega Supreme"[[/note]], however, is about how the already-existing and formerly good[[note]]Ignore the Decepticon symbols already on them, please![[/note]] Constructicons were turned evil by Megatron. Adding to the confusion, Megatron's backstory in "Five Faces of Darkness, Part 4" involves his being created by eight already-existing, ''already-evil'' Constructicons! That's three Constructicon origins, none of which are at all compatible with either of the others.
223	*** Cybertron's supercomputer Vector Sigma is shown in its debut to be the machine that gives Transformers life. Its activation is necessary for them to receive sentience... except the Constructicons and Dinobots[[note]]who only had ''one'' backstory shown[[/note]] were already shown to have been built on Earth with no involvement from Vector Sigma, and no one in either group has any problem moving around or talking. In turn, later episodes would feature Trypticon and the Technobots being constructed on other planets with no involvement from said computer at all. (It's also claimed in the third season that the Quintessons built the Transformers, but these origins aren't necessarily mutually exclusive.)
224	*** The Matrix of Leadership. The powerful artifact containing the wisdom of all past bearers [[NewPowersAsThePlotDemands and other mysterious properties as needed]] has been in Optimus' chest ''all along?'' There was no sign of it when he took major damage to the area it was eventually shown to be held in, or when he received a full-body internal scan in an attempt to distinguish him from a clone, and some people still aren't buying it.
225	*** In TheMovie, Unicron turns Skywarp and Bombshell into ''two'' identical robots that he refers to as "Cyclonus and his armada." A ''second'' Cyclonus is a rather poor "armada..." and only one Cyclonus is ever seen again. Not helping is that Bombshell is seen again, ''not as Cyclonus.'' Voiced in-character, so not one of the cartoon's zillions of "oops, we used the wrong animation model" cases.
226	*** {{Lampshade\|Hanging}}d in a comic that came with the Rodimus Vs. Cyclonus figures. 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]]
227	*** The Coneheads are explicitly destroyed twice, and are just there again next time, without comment.
228	*** In the distant past, Starscream and Skyfire go exploring a primitive planet that would later be named Earth. Skyfire transforms into jet mode and departs... and so does Starscream, revealing he has an [[CoolPlane F-15]] alt-mode four million years before it will be invented.
229	*** As stated before, those are the ''biggies,'' the ones affecting continuity (in a show that's pretty episodic). Rare is the ''G1'' episode that doesn't have ''something'' in this category. Not that the other series are completely innocent, but G1 episodes were often rushed, and not checked for things like this, resulting in errors at the macro[[note]]Constructicons, Cyclonus and his armada[[/note]] and micro[[note]]Ironhide transforms but switches back to the previous mode in the next shot and stays that way, Starscream's voice comes from one of his {{Palette Swap}}s in one shot[[/note]] levels being ridiculously common.
230	** The Anime/UnicronTrilogy, a dub of three series that were originally a ''duology'' and an independent series. Calling it a continuation makes ''Anime/TransformersCybertron'' a continuity headache, where characters who were dead are back without comment (or, in Sideways' case, without ''anyone remembering him.'') and a great many characters who were important [[ChuckCunninghamSyndrome never turning up again]], and a couple of returning characters having ''radically'' different personalities, most glaringly Wing Saber. TheMasquerade is in effect and only Agent Franklin suspects there is something to the alien robots thing, though humans have known of, and worked alongside, Cybertronians for years as of the previous series.
231	* On ''WesternAnimation/WildAnimalBabyExplorers'', in "In the Swim," the Explorers don't recognize tadpoles and don't know that they grow into frogs. However, they learned all about this just a few episodes before in "Big Change." Additionally, in "The Name Game," the Explorers are asked to identify a seahorse by comparing it with a picture of a horse. They, however, had seen seahorses in at least one previous episode, so it should be immediately recognizable to them anyway.
232	* ''WesternAnimation/WinxClub''
233	** The worst example: Nabu. He [[spoiler:sacrifices himself to save the Earth Fairies]] in season four, episode 24. Yet, two episodes later, he's at the Frutti Music Bar watching the Winx's last performance.
234	** At the end of season four, the Winx are back in their Enchantix forms. It remains to be seen if that was an error, but at the very least, they're still Believix fairies in ''Magical Adventure''.
235	** Clarice, the troublemaker from episode one of season four, appears to be a first-year student who has never seen the Winx before. But she and her friends were in season three and ''Secret of the Lost Kingdom''.
236	** ''Magical Adventure'' might as well be considered a separate canon, as it was technically supposed to take place right after ''The Secret of the Lost Kingdom''.
237	*** At the beginning, Sky proposes to Bloom in Domino's palace garden. But he already proposed her at the ball at the end of ''The Secret of the Lost Kingdom''.
238	*** Nabu [[spoiler:is still alive]].
239	*** The strangest example would be the Winx should be in their Season 3 Enchantix forms but are instead in their Season 4 ''Believix'' ones.
240	** The Nickelodeon TV movies summarized seasons one and two and created a few continuity errors because of time constraints.
241	*** Stella was originally "the fairy of the sun and moon" because of her parents, the sun king Radius and the moon queen Luna. But Nickelodeon redubbed her "the fairy of the shining sun." Yet, in season three, Countess Cassandra tells Chimera she would make "a better princess of the sun and moon" than Stella would.
242	*** In the original series, Professor Avalon was [[spoiler:impersonated by one of Darkar's minions]]. But in "The Shadow Phoenix," he was [[spoiler:[[CompositeCharacter Darkar]] in disguise]]. This broke continuity with season three, since [[spoiler:the real]] Avalon was teaching at Alfea.
243	** Sometimes the background fairies and witches got mixed up. A very noticeable example is in Season 1, when a specific girl is first seen in Cloud Tower when the Trix takes over, and a few minutes later, she is fighting the attacking monsters in Alfea.
244	* ''WesternAnimation/XMenTheAnimatedSeries'':
245	** "Enter Magneto" introduces Comicbook/{{Magneto}} as a brand new villain the X-Men have never encountered before, with Professor Xavier being the only one with any past connection to him. Later, a flashback in "Cold Comfort" would show the original teenage X-Men battling Magneto during one of their first missions years earlier.
246	** 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.
247	** Comicbook/{{Cable}} is introduced as a mercenary who has been living in the present for quite some time, and it's mentioned that he'd taken part in a coup in Genosha several years ago. Later episodes would establish that he was actually a freedom fighter from the year 3999, and that he'd specifically time-traveled back to the 90's to SetRightWhatOnceWentWrong. Also, he inexplicably lacked his bionic arm in his first two appearances, despite having it in all his subsequent guest spots.
248	** When Angel first appears, it's clear that he and the X-Men have never met before, and neither Cyclops nor Professor Xavier have any idea who he is. {{Flashback}}s in later episodes would erroneously include a teenage version of Angel as a founding member of the X-Men.
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Context SeriesContinuityError / WesternAnimation