History SeriesContinuityError / WesternAnimation

** The episode where Squidward becomes nice has [[BrokenWinLossStreak Squidward actually beating [=SpongeBob=] for Employee of the Month at the Krusty Krab]]. The problem with this is that, in ''WesternAnimation/TheSpongeVobSquarePantsMovie'' (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.

** The episode where Squidward becomes nice has [[BrokenWinLossStreak 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.

** ''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. All three sequels suffers from their own continuity as well.

* 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:

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

* For the first 5 seasons of ''WesternAnimation/TotallySpies'', most continuity errors are animation-based: sometimes Jerry loses his mustache, sometimes Clover and Alex swaps 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:

* Season 6, a revamp of ''WesternAnimation/TotallySpies'', is riddled with continuity errors, perhaps due to new management from a new studio:

** They're oddly excited that they have spoken to the president, despite the fact that they have done so casually twice with him (or another president, maybe?) in earlier seasons.

** Sam and Alex say they've never ice skated before, which of course, they have in season 1 when they were in high school. Ice skating amnesia much?

** It was never clear ''when'' does it take place comparatively to season 5. At the end of season 5, Jerry's machine works and globally eliminates the evil gene, which results in all personnel of WOOHP retiring because there's no crime left to fight. But 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.

** Sam and Alex say they've never ice skated before, which of course they could in season 1 when they were in high school. Ice skating amnesia much?

** Despite still being college students like in season 5, the Spies literally shrinks 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.

** It was never clear ''when'' does it take place comparatively to season 5. At the end of season 5, Jerry's machine works and eliminate the evil gene on a global scale, which results in all personnel of WOOHP retiring because there's no crime left to fight. But 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.

*** In the original series, the plumbers were an earth only organization that dealt with killing, capturing, or stopping aliens and occasionally the supernatural. The Plumbers went defunct after presumably nuking vilgax to his ship. In Alien Force? They're an ongoing intergalactic space police.

*** 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.

*** 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.

*** 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.

** 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.

** There's also, of course, the infamous "That '90s Show" episode in Season 19, which made many fans angry since it does away with all continuity. It practically erases anything that happened prior to Season 10 or so, by saying that Homer and Marge did not even have kids during the 90s. "The Way We Was" all the way back from Season 2, the episode where Homer and Marge meet, is explicitly set in 1974. That means Marge and Homer took more than 20 years to get married. Clearly "That 90s show" did away with the continuity just for the laughs, but it truly does mess the whole timeline up, even if it is a floating timeline.

* ''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]] claims that [[HandWave they were all either not human or didn't die after all]], but admits to having completely forgotten about the episode in question.

* Ben 10 UAF (''WesternAnimation/Ben10AlienForce'', ''WesternAnimation/Ben10UltimateAlien'') gets a lot of flak for its many continuity errors of the original source(could be obviously due to Dwayne McDuffie lack of input to the original). While ''WesternAnimation/Ben10Omniverse'' Fixes some of UAF's continuity errors, even it suffers from continuity. All three sequels suffers from their own continuity as well.
** ''WesternAnimation/Ben10AlienForce''
*** In the original source, the plumbers were an earth only organization that dealt with killing, capturing, or stopping aliens and occasionally the supernatural. The Plumbers went defunct after presumably nuking vilgax to his ship. In Alien Force? They're an ongoing intergalactic space police.

* ''WesternAnimation/Rugrats'':

** 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).

** "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.

** 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 episodes, his first name is said to be Nigel.

** 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.

* ''WesternAnimation/TheFairlyOddParents'' has a lot of Continuity Errors, especially in the [[SeasonalRot latest seasons]].

** 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.
*** 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]].
** 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.
*** 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.]]

** 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).