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** And, of course, the Anime/UnicronTrilogy, a dub of three series that were originally a ''duology'' and an independent series. Calling it a continuation makes ''TransformersCybertron'' a continuity headache, where characters who were dead are back without comment (or, in Sidewaysï case, without ''anyone remembering him.'') and a great many characters who were important [[BrotherChuck 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. That's by no means the whole list of inconsistencies. [[AllThereInTheManual Read the supplementary materials]] if you want it all explained in a way that [[ContinuitySnarl arguably makes it all worse]].

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** And, of course, the Anime/UnicronTrilogy, a dub of three series that were originally a ''duology'' and an independent series. Calling it a continuation makes ''TransformersCybertron'' ''Anime/TransformersCybertron'' a continuity headache, where characters who were dead are back without comment (or, in Sidewaysï case, without ''anyone remembering him.'') and a great many characters who were important [[BrotherChuck 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. That's by no means the whole list of inconsistencies. [[AllThereInTheManual Read the supplementary materials]] if you want it all explained in a way that [[ContinuitySnarl arguably makes it all worse]].
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* Happens a lot on ''WesternAnimation/AmericanDad''

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* Happens a lot on ''WesternAnimation/AmericanDad''''WesternAnimation/AmericanDad''. They originally could've been excused as RuleOfFunny, but now borders on TheyJustDidntCare in terms of how frequent and contradicting they are.



** In "Of Ice and Men," Toshi (the Japanese kid) marries the Russian bride, but an earlier episode revealed that Toshi isn't worried about getting girls to like him as he has a girl arranged to be married to him back in Japan. Then again, the Russian bride's [[WhatHappenedToTheMouse mysterious disappearance]] after the episode could be the writers remembering that (or just making it so that way Toshi is as much of a loser with girls as Snot, Steve, and Barry are) and [[{{Retcon}} correcting the mistake]].

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** In "Of Ice and Men," Toshi (the Japanese kid) marries Svetlana the Russian bride, but an earlier episode revealed that Toshi isn't worried about getting girls to like him as he has a girl arranged to be married to him back in Japan. Then again, the Russian bride's [[WhatHappenedToTheMouse mysterious disappearance]] after the episode could be the writers remembering that (or just making it so that way Toshi is as much of a loser with girls as Snot, Steve, and Barry are) and [[{{Retcon}} correcting the mistake]].


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*** Svetlana would be indirectly referred to again in Season 4's "Escape from Pearl Bailey" when Toshi remembers having a wife for awhile.
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Rule Of Funny can't be used as an excuse for these errors anymore. Especially with how much more frequent they've been.


* Happens a lot on ''WesternAnimation/AmericanDad'', but most can be dismissed with the RuleOfFunny.

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* Happens a lot on ''WesternAnimation/AmericanDad'', but most can be dismissed with the RuleOfFunny.''WesternAnimation/AmericanDad''


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*** They actually were planning a subplot that would bring us his marriage again by having Steve, Snot, and Barry giving Toshi his very own bachelor's party. The idea was eventually scrapped.


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*** On a similar note, Hayley's favorite song has changed between episodes as well. In Season 12's "Kiss Kiss, Cam Cam" she claims her favorite song is "Bathtub Gin" by Phish. But in Season 6's "Jenny Fromdabloc" it's said that her favorite song is "Gangsta's Paradise" by Coolio.


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** In Season 11's "CIAPOW", Dick claims to have never seen ''Argo''. But in Season 4's "Stan Time" he mentions being in the process of watching every movie ever made thanks to the sleeping pills that prevented him from sleeping.
** In "Now and Gwen" from Season 11, it's revealed that while Francine was a freshmen in high school her adopted sister Gwen was a senior. Even though in Season 3's "Meter Made" it's said that Gwen is three years younger than Francine.
** Despite have a very ''It's a Wonderful Life''-esque fantasy in "Stan of Arabia - Part 2", Stan claims to have never seen the movie in "Dreaming of a White Porsche Christmas" from Season 11.
** Two for Season 11's "Morning Mimosa":
*** Steve is said to be 14 despite turning 15 in Season 7's "Virtual In-Stanity".
*** Snot is romantically interested in Hayley despite losing interest in her in Season 8's "The Missing Kink".
** Two for "My Affair Lady":
*** Hayley mentions being unemployed for five years even though she's been shown have numerous jobs before such as an airport attendant in "Minstrel Krampus" and as a bartender in Roger's bar in "She Swill Survive" (both episodes being from Season 9).
*** Klaus' human design seen in this episode is drastically different from the one shown in the pilot and Season 8's "Da Flippity Flop".
** Francine writes a mystery novel in "Manhattan Magical Murder Mystery Tour", even though she claims to hate reading in "Stan Time" from Season 4.
** In the Season 12 opener "Roots", Stan is shown riding a bike his tree in the flashback sequence even though Season 4's "Jack's Back" claims that he never learned how to ride a bike as a kid.
** Two for Season 12's "The Devil Wears a Lapel Pin":
*** Francine claims she never went to college, even though she mentions meeting Stan there in the pilot as well as mentioning how she stabbed her college roommate in Season 4's "Family Affair".
*** Apparently the Smiths live on 416 Cherry Street instead of 1024 Cherry Street.
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** An episode of ''TheSimpsons'' had Hank Hill appear. This doesn't exactly contradict ''KingOfTheHill'', but it contradicts WordOfGod which says that these shows don't exist in the same Universe.

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** An episode of ''TheSimpsons'' ''WesternAnimation/TheSimpsons'' had Hank Hill appear. This doesn't exactly contradict ''KingOfTheHill'', ''WesternAnimation/KingOfTheHill'', but it contradicts WordOfGod which says that these shows don't exist in the same Universe.
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** 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 "Baby Cakes", Pinkie and the rest of the Mane Six didn't know the Cakes were having twins until the day they were born.

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** 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.
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** 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 "Baby Cakes", Pinkie and the rest of the Mane Six didn't know the Cakes were having twins until the day they were born.
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** In the spinoff ''WesternAnimation/TotalDramaPresentsTheRidonculousRace'' [[spoiler: 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.]]
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Unless Twilight specifically mentioned the castle incident, which I don't remember if she did, she doesn't necessarily have to have been referring to it; it can just as easily be a Noodle Incident that happened in between episodes.


** In "The Hooffields and [=McColts=]", Twilight Sparkle has to freeze an army of ponies, and she remarks that it is much harder than freezing just six ponies, a CallBack to when she had to freeze her friends in "Castle Mane-ia". However, in that episode, Twilight only froze four ponies, not six, [[ItMakesSenseInContext because Pinkie Pie was playing the organ at the time]] and Twilight didn't ever freeze herself, making it only four of the main cast that got frozen.
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This is not a forum.


** In "Of Ice and Men," Toshi (the Japanese kid) marries the Russian bride, but an earlier episode (forgot which one) revealed that Toshi isn't worried about getting girls to like him as he has a girl arranged to be married to him back in Japan. Then again, the Russian bride's [[WhatHappenedToTheMouse mysterious disappearance]] after the episode could be the writers remembering that (or just making it so that way Toshi is as much of a loser with girls as Snot, Steve, and Barry are) and [[{{Retcon}} correcting the mistake]].

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** In "Of Ice and Men," Toshi (the Japanese kid) marries the Russian bride, but an earlier episode (forgot which one) revealed that Toshi isn't worried about getting girls to like him as he has a girl arranged to be married to him back in Japan. Then again, the Russian bride's [[WhatHappenedToTheMouse mysterious disappearance]] after the episode could be the writers remembering that (or just making it so that way Toshi is as much of a loser with girls as Snot, Steve, and Barry are) and [[{{Retcon}} correcting the mistake]].
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*** Homer's half-brother Herb (voiced by [[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).

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*** Homer's half-brother Herb (voiced by [[ItsAlwaysSunnyInPhiladelphia [[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).
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* ''[[WesternAnimation/BatmanTheAnimatedSeries Batman]]'' makes a comment that electricity has no effect on Clayface. Fast forward to ''WesternAnimation/JusticeLeague'', Clayface is easily disabled by electric attacks.

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* ''[[WesternAnimation/BatmanTheAnimatedSeries Batman]]'' makes a comment that electricity has no effect on Clayface. Fast forward to Later in ''The New Batman Adventures'' and ''WesternAnimation/JusticeLeague'', Clayface is easily disabled by electric attacks.
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* ''[[WesternAnimation/BatmanTheAnimatedSeries Batman]]'' makes a comment that electricity has no effect on Clayface. Fast forward to ''WesternAnimation/JusticeLeague'', Clayface is easily disabled by electric attacks.
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** The episode "Chimdale" reveals that [[spoiler:Stan went bald after being the guinea pig for an acne medication which has the side effect of hair loss while he was in college and now has to wear a wig]], but a lot of earlier episodes have shown that [[spoiler:Stan's hair is real. In "Frannie 911," one of the flashbacks of Francine enabling Roger's behavior includes Roger [dressed as an American Indian] scalping Stan and Stan shown with stubble where his hair used to be. If Stan were bald from college into his mid-adult years and has to wear a wig, Roger could have just taken the wig instead of scalping Stan]. In turn, this is forgotten in "Old Stan of the Mountain", when Stan is cursed to age prematurely, and his hair gradually greys and falls out.].

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** The episode "Chimdale" reveals that [[spoiler:Stan went bald after being the guinea pig for an acne medication which has the side effect of hair loss while he was in college and now has to wear a wig]], but a lot of earlier episodes have shown that [[spoiler:Stan's hair is real. In "Frannie 911," one of the flashbacks of Francine enabling Roger's behavior includes Roger [dressed as an American Indian] scalping Stan and Stan shown with stubble where his hair used to be. If Stan were bald from college into his mid-adult years and has to wear a wig, Roger could have just taken the wig instead of scalping Stan].Stan. In turn, this is forgotten in "Old Stan of the Mountain", when Stan is cursed to age prematurely, and his hair gradually greys and falls out.].]].
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** The episode "Chimdale" reveals that [[spoiler:Stan went bald after being the guinea pig for an acne medication which has the side effect of hair loss while he was in college and now has to wear a wig]], but a lot of earlier episodes have shown that [[spoiler:Stan's hair is real. In "Frannie 911," one of the flashbacks of Francine enabling Roger's behavior includes Roger [dressed as an American Indian] scalping Stan and Stan shown with stubble where his hair used to be. If Stan were bald from college into his mid-adult years and has to wear a wig, Roger could have just taken the wig instead of scalp Stan]].

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** The episode "Chimdale" reveals that [[spoiler:Stan went bald after being the guinea pig for an acne medication which has the side effect of hair loss while he was in college and now has to wear a wig]], but a lot of earlier episodes have shown that [[spoiler:Stan's hair is real. In "Frannie 911," one of the flashbacks of Francine enabling Roger's behavior includes Roger [dressed as an American Indian] scalping Stan and Stan shown with stubble where his hair used to be. If Stan were bald from college into his mid-adult years and has to wear a wig, Roger could have just taken the wig instead of scalp Stan]].scalping Stan]. In turn, this is forgotten in "Old Stan of the Mountain", when Stan is cursed to age prematurely, and his hair gradually greys and falls out.].
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** The first season develops Roger's experience with the outside world and learning to use disguise, but later episodes (particularly "Weiner of Our Discontent" and the first Christmas episode in which Stan goes back in time to kill Jane Fonda to rid the world of the wave of political correctness that has ruined Christmas) show that Roger has been disguising himself and living among humans since the 1950s (he protested against the integration of a Southern college in the 1960s by knocking the schoolbooks out of a black girl's hand, popularized disco in the 1970s, auditioned for the role of [[SmallWonder Vicki the robot]] in 1984, and was the contributing factor to Joseph Hazelwood crashing the ''Exxon Valdez'' and causing that oil spill in 1989, Biggie Smalls getting shot and killed in 1997, and George Lucas introducing the world to Jar Jar Binks near the end of the 20th century), perhaps even longer, since one episode revealed that Roger knew Stockard Channing in the 1940s when she was 50 (even though Stockard Channing was born in 1944).

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** The first season develops Roger's experience with the outside world and learning to use disguise, but later episodes (particularly "Weiner of Our Discontent" and the first Christmas episode in which Stan goes back in time to kill Jane Fonda to rid the world of the wave of political correctness that has ruined Christmas) show that Roger has been disguising himself and living among humans since the 1950s (he protested against the integration of a Southern college in the 1960s by knocking the schoolbooks out of a black girl's hand, popularized disco in the 1970s, auditioned for the role of [[SmallWonder [[Series/SmallWonder Vicki the robot]] in 1984, and was the contributing factor to Joseph Hazelwood crashing the ''Exxon Valdez'' and causing that oil spill in 1989, Biggie Smalls getting shot and killed in 1997, and George Lucas introducing the world to Jar Jar Binks near the end of the 20th century), perhaps even longer, since one episode revealed that Roger knew Stockard Channing in the 1940s when she was 50 (even though Stockard Channing was born in 1944).
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* The 2009 version of ''WesternAnimation/RainbowBrite'' has Wisp returning to Earth to be with her family. The problem is Wisp is CovenientlyAnOrphan and showed no signs previously of having any extended, adopted, or fostered family.

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* The 2009 version of ''WesternAnimation/RainbowBrite'' has Wisp returning to Earth to be with her family. The problem is Wisp is CovenientlyAnOrphan ConvenientlyAnOrphan and showed no signs previously of having any extended, adopted, or fostered family.
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* The 2009 version of ''WesternAnimation/RainbowBrite'' has Wisp returning to Earth to be with her family. The problem is Wisp is CovenientlyAnOrphan and showed no signs previously of having any extended, adopted, or fostered family.
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** "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 Tracy Ullman short, "Good Night", though events in the shorts may not have [[CanonDiscontinuity happened]].

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** An episode of ''TheSimpsons'' had Hank Hill appear. This doesn't exactly contradict ''KingOfTheHill'', but it contradicts WordOfGod which says that these shows don't exist in the same Universe.



* An episode of ''TheSimpsons'' had Hank Hill appear. This doesn't exactly contradict ''KingOfTheHill'', but it contradicts WordOfGod which says that these shows don't exist in the same Universe.

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* An episode of ''TheSimpsons'' had Hank Hill appear. This doesn't exactly contradict ''KingOfTheHill'', but it contradicts WordOfGod which says that these shows don't exist in the same Universe.
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* ''[[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).

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* ''[[WesternAnimation/SagwaTheChineseSiameseCat]]'' ''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).
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* ''[[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).
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* An episode of ''TheSimpsons'' had Hank Hill appear. This doesn't exactly contradict ''KingOfTheHill'', but it contradicts WordOfGod which says that these shows don't exist in the same Universe.
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** 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".

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** Kenny is revealed to have a younger sister in "Best Friends Forever", when previously the McCormicks [=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".



** In "The Hooffields and McColts", Twilight Sparkle has to freeze an army of ponies, and she remarks that it is much harder than freezing just six ponies, a CallBack to when she had to freeze her friends in "Castle Mane-ia". However, in that episode, Twilight only froze four ponies, not six, [[ItMakesSenseInContext because Pinkie Pie was playing the organ at the time]] and Twilight didn't ever freeze herself, making it only four of the main cast that got frozen.

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** In "The Hooffields and McColts", [=McColts=]", Twilight Sparkle has to freeze an army of ponies, and she remarks that it is much harder than freezing just six ponies, a CallBack to when she had to freeze her friends in "Castle Mane-ia". However, in that episode, Twilight only froze four ponies, not six, [[ItMakesSenseInContext because Pinkie Pie was playing the organ at the time]] and Twilight didn't ever freeze herself, making it only four of the main cast that got frozen.
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** In "The Hooffields and McColts", Twilight Sparkle has to freeze an army of ponies, and she remarks that it is much harder than freezing just six ponies, a CallBack to when she had to freeze her friends in "Castle Mane-ia". However, in that episode, Twilight only froze four ponies, not six, [[ItMakesSenseInContext because Pinkie Pie was playing the organ at the time]] and Twilight didn't ever freeze herself, making it only four of the main cast that got frozen.
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** There's another episode via flashback that shows 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, ''TheClevelandShow'' depicts on more than one occasion that Cleveland attended high school in Stoolbend, not Quahog.

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** There's another episode via flashback that shows 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, ''TheClevelandShow'' ''WesternAnimation/TheClevelandShow'' depicts on more than one occasion that Cleveland attended high school in Stoolbend, not Quahog.

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** While Lindsey Naegle does [[WhyDoYouKeepChangingJobs 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.

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** While Lindsey Naegle does [[WhyDoYouKeepChangingJobs change jobs surprisingly often]] 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.
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natter, if i am remembering well, the fact that the six friends not put two and two prior to \"The Cutie Mark Chronicles\" is explicitily stated. And the fact that the series uses Anachronic Order was confirmed by Word Of God


** In "The Cutie Mark Chronicles", the main characters have not met, but all experience life changing inspiration by witnessing Rainbow Dash's first Sonic Rainboom, especially Pinkie Pie, making the successful Sonic Rainboom in "Sonic Rainboom" not her first Sonic Rainboom, but a Sonic Rainboom, which Pinkie Pie claims to have never seen before.
*** In "Sonic Rainboom" they mention that Rainbow Dash pulled it off when she was a filly near the beginning of the episode. Pinkie Pie isn't supposed to make sense, but she probably didn't put two and two together that it was a SR she saw.
** [=MLP:FiM=] is in Anachronistic Order. Example: In Swarm of the Century [=(S1E10)=] Rarity's gala dresses are shown. In Suited for Success [=(S1E14)=], Rarity gets her friends together to design their gala dresses.
** The progression of seasons during season one is out of order, or doesn't match Earth's regular progression.
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** [=MLP:FiM=] is in Anachronistic Order. Example: In Swarm of the Century [=(S1E10)=] Rarity's gala dresses are shown. In Suited for Success [=(S1E14)=], Rarity gets her friends together to design their gala dresses.
** The progression of seasons during season one is out of order, or doesn't match Earth's regular progression.
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***They probably don't know what she looked like because 1: Parts of a story get changed as it is retold over and over again, i.e. Santa Claus. 2: That statue wasn't in Ponyville, it was in the [[http://i.imgur.com/oOhQqYw.png Everfree Forest]].


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*** It's possible the ponies have a long-ass life span, like say, the [[http://www.iol.co.za/dailynews/news/the-warty-oreo-dory-lives-to-over-200-years-1.1784161 Marty Oreo fish.]]


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***In "Sonic Rainboom" they mention that Rainbow Dash pulled it off when she was a filly near the beginning of the episode. Pinkie Pie isn't supposed to make sense, but she probably didn't put two and two together that it was a SR she saw.
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Creating a page for the Western Animation examples of Series Continuity Error because of how long the list has gotten lately.

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* ''WesternAnimation/GoofTroop''
** 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.
** 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.
** 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.
** 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.
** 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]]).
** 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.
* Just a few of the more famous ones from the ''Franchise/{{Transformers}}'' franchise:
** 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 do affect the big picture:
*** The Constructicons. Their introduction discusses the Decepticons building them in the caves they were in at the time. Omega Supreme's backstory, however, involves how the already-existing and formerly good (ignore the Decepticon symbols already on them, please!) Constructicons were turned evil by Megatron. ''Megatron's'' backstory? He was created by the already-existing, ''already-evil'' Constructicons! That's three Constructicon origins, none of which are at all compatible with either of the others.
*** 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, and some people still aren't buying it.
*** 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. Who became Cyclonus and what happened to the other? Good question. (Oh, and Bombshell ''is seen again, not as Cyclonus.'' Voiced in-character, so not one of [=TFG1's=] zillions of "oops, we used the wrong animation model" cases.)
*** Awesomely {{Lampshaded}} 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]]
*** The Coneheads are explicitly destroyed twice, and are just there again next time, without comment.
*** 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 (Constructicons, Cyclonus and his armada) and micro (Ironhide goes to van mode and is robot mode in the very next shot and stays that way, Starscream's voice comes from his PaletteSwap Thundercracker in one shot) levels being ridiculously common.
** And, of course, the Anime/UnicronTrilogy, a dub of three series that were originally a ''duology'' and an independent series. Calling it a continuation makes ''TransformersCybertron'' a continuity headache, where characters who were dead are back without comment (or, in Sidewaysï case, without ''anyone remembering him.'') and a great many characters who were important [[BrotherChuck 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. That's by no means the whole list of inconsistencies. [[AllThereInTheManual Read the supplementary materials]] if you want it all explained in a way that [[ContinuitySnarl arguably makes it all worse]].
* 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.''
* ''WesternAnimation/{{Recess}}''
** 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.
** Not to mention Gus being the new kid in school in fourth grade, yet somehow also appearing in kindergarten, as well as how he appears 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.
** Also, 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.
* ''WesternAnimation/KingOfTheHill''
** 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").
** 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.
** 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.
** 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.
** 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.
* [[WordOfGod Joe Murray has said]] that any flashback contradicting another flashback on ''WesternAnimation/RockosModernLife'' is just the result of people misremembering or exaggerating things, not unlike in RealLife. Thus, Filbert remembering being in high school with Rocko, in spite of Rocko having just moved to the States recently, is just Filbert misremembering.
* ''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 was 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've been aware of the error, but this one was ''not'' played for laughs.
* 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).
** 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".
** 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.
** 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 3 children, obviously).
** 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.
** 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.)
** "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.
** 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 two episode "Old Money," Grampa told Bea (his short-lived girlfriend) that he only had one kidney.
** While Lindsey Naegle does [[WhyDoYouKeepChangingJobs 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.
** 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:
*** Homer's half-brother Herb (voiced by [[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).
*** Added to that, Homer is later revealed to have a half-sister who is dumber than him in a completely unrelated episode.
*** The season 12 episode "HOMR" revealed that Homer actually is smart (or at least of average intelligence), but became dumb when he shoved a bunch of crayons up his nose and one got lodged in his brain.
*** 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).
** 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 make him a baby boomer (born between 1946-64) and 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 at least 60 now.
** The episode "Angry Dad: The Movie" was a big reference to the original "Angry Dad" creation that Bart had created several years earlier.. It doesn't make any sense though. For one they explicitly show that Bart made it in the ''90s'' when the episode takes place in 2011. Due to the floating timeline, Bart would have to have been born in TheNoughties. Also, no one ever ages, so no years pass, yet they make it seem like Angry Dad came out years ago. Bart should have been younger than ten when he created it.
** 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.''
* ''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.").
* ''WesternAnimation/{{Arthur}}''
** In an episode, Sue Ellen is seen in a Kindergarten class photo when in fact she transferred in third grade.
** In another episode Muffy was shown in a Kindergarten flashback but she moved to Elwood City in the second grade.
** Another episode has Pal present when Arthur and D.W were younger, even though he was gotten when they were still their present age.
** 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.
** In a flashback of Arthur's Baby, a baby Mr Ratburn is called Emil by his mother while he scrawls multiplication sums on the wall. However, in future names, his first name is said to be Nigel.
* ''WesternAnimation/{{Futurama}}''
** 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). Lampshaded on the DVD commentary.
-->"''They never said 'Star Trek,' they said 'Start Wreck!'''"
** 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.
** 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.
** Bender has mentioned being able to remember his own "birth." In season 6, it is revealed that Bender does not remember who was the inspector who approved him on the assembly line, and spends the episode trying to find out.
** Versions of his Birth are also pending to changes. In the episode where he recounts his birth, it was shown that he was built the way he was at that moment in a robot factory in Mexico. In another episode, where the cast turns into babies, Bender slowly de-upgrades along with everyone else, shrinking with each successive step just like everyone else. On top of that, he mentions he's only 5 years old, yet shrinks with everyone else in the aforementioned episode. If he really was 5 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''.
** 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 on the later episode "Ghost in the Machines", Bender dies and becomes a ghost, able to possess any machine.
*** He ''did'' [[DealWithTheDevil make a deal with the Robot Devil]] in that episode, though. At the very least, it's a HandWave as to why he was able to die and come back that time.
** Also in "Ghost in the Machines" we meet Robot God. This does not contradict anything in the series but it does contradict several audio-commentaries on past seasons where Matt Groening and the writers repeatedly stated that there is no Robot God.
* ''WesternAnimation/TheGrimAdventuresOfBillyAndMandy''
** Grim becomes the Grim Reaper on at least three separate occasions. 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 millenia to please his father, and got the '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 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.
* The ''WesternAnimation/TotalDrama'' series has this fairly often.
** One episode, for example, claims that Lindsay has very large feet ([[InformedAttribute that we never see]]) when she takes off her (apparently very tight) boot. However, we see her barefoot in the TDI Playa des Losers episode, and it's as small as you would expect it to be.
** 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.
* ''WesternAnimation/{{SpongeBob SquarePants}}''
** 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...]]
** The episode where Squidward becomes nice has [[BrokenStreak Squidward actually beating [=SpongeBob=] for Employee of the Month at the Krusty Krab]]. The problem with this is that, in ''WesternAnimation/TheSpongebobSquarepantsMovie'' (which is the chronological series finale [[WordOfGod according to the creator]]), [=SpongeBob=] says he has won that award 374 times in a row. Note that winning employee of the month that many times (let alone in a row) means he's been working at the Krusty Krab for a minimum of 31 years and a bit.
* In the Disney animated series ''WesternAnimation/{{Hercules}}'', 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''?
* Similar to the ''[=SpongeBob=]'' example above, ''WesternAnimation/TheFairlyOddParents'' episode "Double-Oh-Schnozmo!" introduces Cosmo's [[LongLostUncleAesop brother Schnozmo]], despite that the earlier episode "The Gland Plan" said that Cosmo didn't have any siblings.
* Happens a lot on ''WesternAnimation/AmericanDad'', but most can be dismissed with the RuleOfFunny.
** In "42-Year-Old Virgin", Stan claims to have never killed anyone, but he broke Jay Leno's neck on "Stan of Arabia, part I", killed his co-worker's double at the beginning of "It's Good to Be Queen", accidentally disintegrated one of his other co-workers in "I Can't Stan You", shot down a hang glider in "An Apocalypse to Remember," and shot a painter in "Con Heir."
** However, the episode "Haylias" ends with Stan suffering from evident selective memory loss following his battle with the BrainwashedAndCrazy Hayley, which could explain his assertion that he has never killed anyone as "Haylias" aired on American TV before "The 42-Year-Old Virgin."
** Another possibility is that Stan has never killed anyone he was assigned to kill, since all of the murders he committed were accidental.
** The first season develops Roger's experience with the outside world and learning to use disguise, but later episodes (particularly "Weiner of Our Discontent" and the first Christmas episode in which Stan goes back in time to kill Jane Fonda to rid the world of the wave of political correctness that has ruined Christmas) show that Roger has been disguising himself and living among humans since the 1950s (he protested against the integration of a Southern college in the 1960s by knocking the schoolbooks out of a black girl's hand, popularized disco in the 1970s, auditioned for the role of [[SmallWonder Vicki the robot]] in 1984, and was the contributing factor to Joseph Hazelwood crashing the ''Exxon Valdez'' and causing that oil spill in 1989, Biggie Smalls getting shot and killed in 1997, and George Lucas introducing the world to Jar Jar Binks near the end of the 20th century), perhaps even longer, since one episode revealed that Roger knew Stockard Channing in the 1940s when she was 50 (even though Stockard Channing was born in 1944).
** In "Of Ice and Men", Roger doesn't know what happened to Stan's skating partner, though "Roger 'N Me" shows that Roger probed Stan and now has all of his memories. Either the writers forgot about that part or Roger just doesn't care about anyone who's not him (which is par for his character).
** In the pilot episode, Roger (after getting sneezed on) sarcastically says he's supposed to bring pneumonia back to his planet, but in the second episode, Roger claims that his species is immune to all human ailments (except for an unexplained cold sore). On top of that, "Weiner of Our Discontent" reveals that [[spoiler:Roger was the crash test dummy for a new model spaceship and intended to die upon impact, meaning that his planet doesn't want him back. It could be explained that his planet was just lying to him so he would get in the ship,]] but that just brings up another plot hole because Roger clearly said that [[spoiler: he was "sent" to decide the fate of humanity.]]
** In "Of Ice and Men," Toshi (the Japanese kid) marries the Russian bride, but an earlier episode (forgot which one) revealed that Toshi isn't worried about getting girls to like him as he has a girl arranged to be married to him back in Japan. Then again, the Russian bride's [[WhatHappenedToTheMouse mysterious disappearance]] after the episode could be the writers remembering that (or just making it so that way Toshi is as much of a loser with girls as Snot, Steve, and Barry are) and [[{{Retcon}} correcting the mistake]].
** In "Brains, Brains, and Automobiles," Francine teaches Roger how to use the vacuum cleaner, even though Roger had used one before in "Not Particularly Desperate Housewives" (even though the vacuum was rigged to explode by the Ladybugs). On top of that, Roger already knows how to clean a house (as seen in "Helping Handis").
** The episode "Chimdale" reveals that [[spoiler:Stan went bald after being the guinea pig for an acne medication which has the side effect of hair loss while he was in college and now has to wear a wig]], but a lot of earlier episodes have shown that [[spoiler:Stan's hair is real. In "Frannie 911," one of the flashbacks of Francine enabling Roger's behavior includes Roger [dressed as an American Indian] scalping Stan and Stan shown with stubble where his hair used to be. If Stan were bald from college into his mid-adult years and has to wear a wig, Roger could have just taken the wig instead of scalp Stan]].
** In the season two episode "It's Good to Be Queen," it's revealed that Francine's favorite song is "Little Red Corvette" by Prince, but in the season one episode, "Francine's Flashback", Francine's favorite song is "The Greatest Love of All", by Whitney Houston (whom Stan personally brought over to sing to Francine in exchange for crack cocaine). It ''is'' possible that Francine can have two favorite songs, but for the purposes of continuity, the writers should have stuck with "The Greatest Love of All" as Francine's favorite song since that was revealed first.
** In the episode "May the Best Stan Win," there is a tombstone that reveals that Stan was born in 1967 and Francine was born in 1971, making Stan four years older than Francine, but the season one episode where Hayley dates Stan's boss reveals that Francine is actually ten months younger than Stan. This also throws Francine's continuity out of whack, since it's been stated that she was a wild teenager in the 1980s. If Francine really was born in 1971, she would have been nine in 1980 and wouldn't reach teen age (13) until 1984 (even though the episode "Francine's Flashback" shows that Francine looked at least sixteen in the mid-1980s when she first met Stan).
** In the season two episode "Star Trek" (in which Steve becomes a children's book author), Steve is horrified and disgusted when he finds out that the centerfold model Stan promised him is an old woman (and that the picture of her when she was young was from 1957), but in season one's "Con Heir," Steve had no problem making out with and having a romantic relationship with an elderly woman at a nursing home. Then again, it's possible that he was just too disappointed to look over her age as the model used to be ''very'' attractive.
* ''WesternAnimation/SouthPark''
** In the episode "Cartman's Mom Is Still a Dirty Slut (2)", 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.
** 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]]?)
** There have been several examples of minor characters' names changing, and even more important secondary characters have inconsistent surnames (Token Williams becomes Token Black, Jimmy Swanson becomes Jimmy Valmer, etc.)
** 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 wash his hands.
** 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.
** 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.
** 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).
** 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.]]
* ''WesternAnimation/WinxClub''
** The worst example: Nabu. He [[spoiler:sacrifices himself to save the Earth Fairies]] in season four, episode 24. Yet, two episodes, he's at the Frutti Music Bar watching the Winx's last performance.
** 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 in the very least, they're still Believix fairies in ''Magical Adventure''.
** 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''.
** ''Magical Adventure'' might as well be considered a separate canon.
*** 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''.
*** Nabu [[spoiler:is still alive]].
** The Nickelodeon TV movies summarized seasons one and two and created a few continuity errors because of time constraints.
*** 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.
*** In the original series, Professor Avalon was [[spoiler:impersonated by one of Darkar's minions]]. But "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.
* ''WesternAnimation/FamilyGuy''
** An early episode contains a flashback to when Stewie was younger and he had a normal-shaped head. He was jumping on the bed, smacked his head into the ceiling, and squished it into its trademark football shape. In another episode there's a flashback to when Stewie was born and he already had the football head.
** There's another episode via flashback that shows 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, ''TheClevelandShow'' depicts on more than one occasion that Cleveland attended high school in Stoolbend, not Quahog.
* ''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"''.
* In the Season 1 episode of ''WesternAnimation/PeterPanAndThePirates'' "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.
* ''Series/CodeLyokoEvolution'' has some with its mother series, ''WesternAnimation/CodeLyoko'':
** 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.
** 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.
** 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.
* 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 ''WesternAnimation/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.
* ''WesternAnimation/MyLittlePonyFriendshipIsMagic'':
** In the first episode, 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 "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. Ponyville also has a huge statue of Nightmare Moon.
** In "Winter Wrap Up", Twilight Sparkle says Ponyville has been around for hundreds of years. In "Family Appreciation Day", Ponyville was founded by Granny Smith's parents when she was a child, making it less than a hundred years old.
** In "The Cutie Mark Chronicles", the main characters have not met, but all experience life changing inspiration by witnessing Rainbow Dash's first Sonic Rainboom, especially Pinkie Pie, making the successful Sonic Rainboom in "Sonic Rainboom" not her first Sonic Rainboom, but a Sonic Rainboom, which Pinkie Pie claims to have never seen before.
* 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.
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