History SeriesContinuityError / WesternAnimation

*** In the distant past, Starscream and Skyfire go exploring a primitive planet that would later be named Earth. They transform into jet mode and depart. Wait, how did Starscream already has a F-15 alt-mode 4 millions years before it will be invented?

** ''Magical Adventure'' might as well be considered a separate canon.

** 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.

** 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 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 or even ''70'' now.

* 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.

** 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.

** 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.
*** Of course, that was just a CutawayGag, which only happen for RuleOfFunny anyway. They frequently depict events which almost certainly never happened.

** In "Born Again Krabs", Mr. Krabs insists on trying to sell a clearly inedible Krabby Patty and eventually eats it himself, and in "The Krusty Sponge", he sees no problem selling 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. Similarly, in "Cuddle E. Hugs", [=SpongeBob=] gets sick from eating another old patty when "Born Again Krabs" had him throw out the first one without a second thought.

* To list ''all'' of ''WesternAnimation/TheSimpsons'' series continuity errors would take longer than 30 years. 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 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.

** 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''.

** Also in the first movie, Billy says that he's getting a new bike for Christmas when the end credits of "[[ChristmasEpisode Billy & Mandy Save Christmas]]" had him off-handedly allude to being Jewish.

* ''[[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.

* 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''.\\\

** 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 nearby 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 implies 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. Granted it's possible the ponies have a long-ass life span like the [[http://www.iol.co.za/dailynews/news/the-warty-oreo-dory-lives-to-over-200-years-1.1784161 Warty Oreo fish]], that Twilight simply meant Earth Ponies as a ''whole'' have done Winter Wrap Up without magic for hundreds of years and of course they continued this when they founded Ponyville, or of course that Granny Smith was lying her ass off.

** 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.

** In the {{Rashomon Style}} 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.

** 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.

* ''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.

** In "Winter Wrap Up", Twilight Sparkle implies 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. Granted it's possible the ponies have a long-ass life span like the [[http://www.iol.co.za/dailynews/news/the-warty-oreo-dory-lives-to-over-200-years-1.1784161 Marty Oreo fish]], that Twilight simply meant Earth Ponies as a ''whole'' have done Winter Wrap Up without magic for hundreds of years and of course they continued this when they founded Ponyville, or of course that Granny Smith was lying her ass off.

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

** In ''WesternAnimation/ThePowerpuffGirls2016'', the girls make fun of Wonder Woman for her risque costume. In the original ''WesternAnimation/ThePowerpuffGirls'', the girls have actually met her and are shown to respect her.