History WhatHappenedToTheMouse / WesternAnimation

* In WesternAnimation/HighGuardianSpice, Chompy the chest never appears again after episode 4

* In ‘’WesternAnimation/HighGuardianSpice’’, Chompy the chest never appears again after episode 4

** In "Stanley S. [=SquarePants=], Squidward is introduced to [=SpongeBob's=] cousin Stanley and is so freaked out that he [[ScrewThisImOuttaHere moves out in a haste.]] Following this, he is not seen again for the rest of the episode, even during the Krusty Krab scenes where Stanley somehow takes his place.

*** Whatever happened to Sokka's CoolSword after [[spoiler:it fell off when Sokka threw it to save himself and Toph in the GrandFinale]]?

*** Azula was never referenced in ''WesternAnimation/TheLegendOfKorra''. The same goes for Ty Lee and Mai; the latter situation having fans questioning if Mai is Izumi's (Zuko's daughter) mother or not. Suki is also never mentioned in ''The Legend of Korra''.

* An early episode of ''WesternAnimation/TheFairlyOddParents'' established [[AlphaBitch Trixie]] as a closet {{tomboy}}, apparently setting something up between her and Timmy. This is never mentioned again.

** The episode "Hurricane!" has news reporter Greg get sucked up into the sky by the eponymous hurricane. A later scene has his boyfriend asking people if they've seen him, but it's not revealed whether he survived or if the storm killed him. Seeing as how he appears in the following episodes, he has in fact survived; but how he did was never explained.

** The episode "Hurricane!" has news reporter Greg get sucked up into the sky by the eponymous hurricane. A later scene has his boyfriend asking people if they've seen him, but it's not revealed whether he survived or if the storm killed him. Seeing as how he appears in the following episodes, he has in fact survived.

* ''WesternAnimation/{{Futurama}}'''s Season 7 episode "The Bots and the Bees" features Bender having sex with a vending machine that gives him a son the next day. Said son, Ben, is never seen or mentioned again afterwards, not even in the GrandFinale.
** In the last movie, ''Wild Green Yonder'', towards the end, the eco-feminists break out of prison. While all of them leave, we only see [[NominalImportance Leela, Amy and LaBarbara]] * getting picked up by the Planet Express ship, leaving it uncertain what happened to the others.
* ''WesternAnimation/FraidyCat'' most notably has terrible continuity when it comes to it’s episodes, most instances having characters not being shown again after a scene. Examples include:

** Also, in "Insane Clown Poppy" Krusty seems to have a pretty strong relationship with his daughter at the end, who just vanishes next episode.

** The show is usually good with continuity, which makes this oversight all the more damning: In "FUGITIVE", the operatives and the head of decommissioning, #86, are going after an escaped operative, #208, scheduled for decommissioning. #86 briefly mentions sending their best spy, #362, to infiltrate the Delightful Children's mansion (where the #208 is entering). While inside, #208 escapes from #86 and was last seen running down the hall, then a similarly-dressed #362 runs back and is mistaken for him and captured. #362 [[AscendedExtra became a major character in her own right]], but the show never got around to answering what happened to the escaped operative.

** What happened to the Delightful Children is also unknown, though with their final exit [[spoiler: [[KilledOffForReal it's assumed they drowned]]]].

** In "Stanley S. [=SquarePants=], Squidward is introduced to SpongeBob's cousin Stanley and is so freaked out that he [[ScrewThisImOuttaHere moves out in a haste.]] Following this, he is not seen again for the rest of the episode, even during the Krusty Krab scenes where Stanley somehow takes his place.

*** This happens a second time at the end of the episode. Lawrence conducts a [[ImpostorExposingTest test to see which Boris is real]], whereas both cats are given a food bowl. Being the picky eater he is, Boris turns his nose to the bowl, and Fraidy downs it. Boris doesn't get shown in the rest of the episode again. An explanation is that Lawrence and other others could be keeping Boris hostage, because even Boris wanted out.

** “The Magic Number” has Cloud Nine shoot a lightning bolt at an old dresser with Fatty Catty and Long-tail still in it. They both pop out as toast-shaped cats, and they are never seen again, with no mention of them.
** In the final episode, “A Small Star is Born”, Fraidy (who is disguised as famous TV star Boris the Cat) eats at a table with Mister Fred, Gentle Babs, Laffy, and Lawrence the lop-sided lion. In the scene after Laffy announces that the real Boris has come to the Animal Actors Retirement Home, Mister Fred and Laffy aren’t seen again.

*** The GrandFinale answered most questions but left three plot points hanging: [[spoiler:what happened to Ursa]], [[spoiler:did Toph ever make up with her parents]], and [[spoiler:Iroh's journey to the SpiritWorld]]? The first two points were later addressed in the comics, and the last in Book 2 of the SequelSeries ''WesternAnimation/TheLegendOfKorra''

* At the end of ''WesternAnimation/TheCritic'''s run (at least a couple of seasons), Jay, who up to that point hasn't had much luck with women, was in a steady relationship with a mature, decent, likable woman, and despite a few stumbles, they were hitting it off great. Then comes the short-lived internet adaptation, and she's completely gone with no explanation (along with his son and longtime boss).
** In the first webisode, Jay mentions his "second divorce", implying that the relationship ended badly, but no details are given. Still nothing about his son or (now former) boss.

* The ''WesternAnimation/StarVsTheForcesOfEvil'' Season 1 episode "[[Recap/StarVsTheForcesOfEvilS1E5MonsterArm Monster Arm]]" ends with the titular demonic arm, as it transforms back into a normal limb, telling Marco that WeWillMeetAgain, as it's permanently a part of him now. Star assures him that the threat is ''probably'' nothing to worry about, followed by close-up of Marco's worried face and a lingering shot on his broken arm before the cut to black. While the arm is at least mentioned briefly in Season 3 as part of a quick joke, it fails to make a return appearance for the remainder of the series. WordOfGod states that they attempted to return to this plot point several times, but could never come up with a good enough story.

** The Henchmaniacs of Bill, which are 10, disappear at times, in fact, you'll never the 10 Henchmaniacs at the same time. For example, in the scene they crash againist the Weirdness Magnetism Law in "Weirdmageddon 2: Escape From Reality", only Paci-Fire, Zanthar, Pyronica, Hectorgon, Keyhole and Kryptos are seen crashing, but Lava Lamp Guy, Amorphous Shape, 8 Ball and Teeth are nowhere to be seen.

** In "The Fast and the Phineas" when Isabella brings the Fireside Girls to be Phineas' pit crew, Milly is strangely not seen during the pit stop.

* In ''WesternAnimation/TheProudFamily'' episode "[[Recap/TheProudFamilyS2E23CultureShock Culture Shock]]", Penny befriends a Muslim girl and her family as part of a school project on racial diversity. One night, the Prouds and the Muslim family return home to find that [[Egging someone vandalized]] [[ToiletPaperPrank the house]] and scrawled a racist message on the garage door (in the original version, it read, "GO HOME, TOWELHEADS!"; in the reruns, the message was digitally altered to just read, "GO BACK TO YOUR COUNTRY!") to their shock and horror. While this does lead to Penny making a speech at school the following day about how Muslims have been discriminated against more thanks to the 9/11 attacks, and that doing so is wrong, viewers are still left wondering who vandalized the house in the first place.

* In an episode of ''WesternAnimation/TheProudFamily'', Penny befriends a Muslim girl and her family as part of a school project on racial diversity. One night, the Prouds and the Muslim family return home to find that [[Egging someone vandalized]] [[ToiletPaperPrank the house]] and scrawled a racist message on the garage door (in the original version, it read, "GO HOME, TOWELHEADS!"; in the reruns, the message was digitally altered to just read, "GO BACK TO YOUR COUNTRY!") to their shock and horror. While this does lead to Penny making a speech at school the following day about how Muslims have been discriminated against more thanks to the 9/11 attacks, and that doing so is wrong, viewers are still left wondering who vandalized the house in the first place.

* In an episode of ''WesternAnimation/TheProudFamily'', Penny befriends a Muslim girl and her family as part of a school project on racial diversity. One night, Penny and the Muslim family return home to find that someone scrawled a racist message on the garage door (in the original version, it read, "GO HOME, TOWELHEADS!"; in the reruns, the message was digitally altered to just read, "GO HOME!") to their shock and horror. While this does lead to Penny making a speech at school the following day about how Muslims have been discriminated against more thanks to the 9/11 attacks, and that doing so is wrong, the viewer is still left wondering who scrawled that horrible message on the garage in the first place.

** "Secrets of a Successful Marraige" is about Homer leading a class at the adult education center, solving marraige-related problems from various citizens of Springfield. Once he starts sharing secrets about Marge and gets kicked out of the house, it's never shown what happened to his class.