History SeriesContinuityError / WesternAnimation

** In another episode Muffy was shown in a Kindergarten flashback but she moved to Elwood City in the second grade.

** 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.

** There have been several examples of minor characters' names changing, and even more important secondary characters have inconsistent surnames (Token Williams becomes Token Black and later Tolkien 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.

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

** In one of the Season 10 episodes, Vicky acts evil around Timmy's parents. Vicky being a terrible baby-sitter is a secret. In "Channel Chasers", Vicky was fired after Timmy's parents learned the truth about how she treated Timmy.

** “The Impossible Stream” shows Slurms Mackenzie advertising the Slurm Zero product in a commercial even though he was killed in “Fry And The Slurm Factory”. This also comes at the fact that for reasons unknown, Mackenzie is also show he shriveled up and heavily coughing at the end of the commercial.

** In a similar manner to how Fry reached to Lrrr’s palace, Leela in “Zapp Gets Cancelled” acted very amazed at seeing the Nimbus and compared it to a “Princess cruise ship with laser cannons”. The problem with Leela’s reactions 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 Labors In Space”, “Kif Gets Knocked Up A Notch” and “Zapp Dingbat”

** Roberto was killed off in “The Six Million Dollar Mon” after he eats a piece of skin from Hermès that causes him to melt and have his brain chip completely destroyed. However “Stench And Stenchibility” has Roberto show up alive and well to rob Zoidberg and Marianne without any explanation.

** “How The West Was 1010001” has Roberto show up alive again and play a major role in the plot of the episode even though he died in “The Six Million Dollar Mon”

** 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 named Harold Zoid.

* 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.''

** [[WordOfGod Joe Murray has said]] that any flashback contradicting another flashback is just the result of people misremembering or exaggerating things, not unlike 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.

*** 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 [[JustForPun plot]] point in the latter episode was the revelation that Cotton was misremembering a lot of his supposed wartime experiences.

*** Homer's half-brother Herb (voiced by Creator/DannyDeVito) 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).

** 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 GrandFinale [[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.

** "Pin Gal" has Homer finding about Marge's brief fling with Jacques, despite Marge already telling the famiily 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 really American, as he briefly dropped the accent when ordering onion rings.

* ''WesternAnimation/MarthaSpeaks'': 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.

** Roberto was killed off in “The Six Million Dollar Mon” after he eats a piece of skin from Hermès that causes him to melt and have his brain chip completely destroyed. However “Stench And Stenchibility” has Roberto show up alive and well to rob Zoidberg and Marianne without any explanation. However, "Lethal Inspection" reveals that robots have a backup unit that enables them to download into a new body after dying, so it's possible that this was the case.

** 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.

** In "Chuckie's Complaint" the babies 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.