History AllThereInTheManual / WesternAnimation

** Many of the background ponies/minor characters are never named in-show, their names only being found on toy packaging or trading cards. This even extends to supporting characters' surnames/middle names; Trixie's surname is "Lulamoon" and Diamond Tiara's middle name is "Dazzle". The greatest example of this is probably the Changeling Queen: she's never referred to by name in the show proper, and her name, "Chrysalis", was relegated to [[AllThereInTheScript the script]] until the [[ComicBook/MyLittlePonyFriendshipIsMagicIDW comics]] came out and made it official.

** Constance is the shortest and the chubby one. Her name was revealed in the rainbowmonkeys.com, if you type in [[spoiler: Numbuh 0.5, her codename as a Sector Z operative]];** And finally there's Alessandra, the tall blond girl. Similar to David, her name was shown in [[ContentLeak leaeked]] concept art for Operation: Z.E.R.O.

* ''WesternAnimation/WorkItOutWombats'': The [[https://drive.google.com/file/d/1ZwrSoDzyGuIKHVMATfB3lTgaNNCDI6CD/view?usp=sharing style guide]] and [[https://drive.google.com/file/d/1t73OaptjdHI5sb_kuvC40NEIq4vuZsFF/view?usp=sharing pitch document]] contain info on the settings and characters of the show, like how Sammy's parents are divorced and his mom lives in the Flowerborhood.

* ''WesternAnimation/BatmanTheAnimatedSeries'' had several tie-in comic book series. Beyond introducing a [[CanonForeigner few new villains]], the comics provided an origin for ComicBook/HarleyQuinn, which [[RecursiveAdaptation eventually made its way into the show]].

* ''WesternAnimation/YoungJustice'' had a tie-in comic, like most [=DC=] {{animated adaptation}}s, but theirs was co-written by writers and producers from the series and went into details like why the Justice League abandoned their headquarters at Mt. Justice, how Artemis found the battle with A.M.A.Z.O., and just ''why'' ComicBook/{{Superboy}} hates monkeys so much. It also provided an origin for Clayface, and at least one issue contained a scene that was scripted but ultimately cut from an actual episode of the show.

* The Nick.com e-cards for ''WesternAnimation/ChalkZone'' told us that Rudy's full name is Rudolph Bartholomew Tabootie.

* On ''WesternAnimation/TheFlintstones'', when the Rubbles first find baby Bamm-Bamm in a tortoise-shell basket on their doorstep, they quickly learn that he has near-superhuman strength. No explanation was ever given for this strength on the show. Some 30 years after the series aired, a trading card finally gave an answer. [[spoiler:Bamm-Bamm was raised by dinosaurs in the wild.]]

* Similarly, the Nick.com e-cards for ''WesternAnimation/ChalkZone'' told us that Rudy's full name is Rudolph Bartholomew Tabootie.

* The supplementary ''WesternAnimation/DocMcStuffins'' book ''Doc [=McStuffins=]: My World'' states that Doc's father is a chef. This is never mentioned on the series itself.

* The [[Literature/GravityFallsJournal3 real-life Journal 3]] that was released following the finale of ''WesternAnimation/GravityFalls'' ties up some of the remaining loose ends like [[spoiler:what happened to Blendin Blandin during the events of the finale]], gives insight to the Author's life while living in Gravity Falls ([[spoiler:as well as on the other side of the portal]]), and divulges other bits of information that the show never mentioned like Dipper's real name, [[BigBad Bill Cipher]]'s backstory, and adventures that [[{{Interquel}} occurred between episodes]]. The [[VideoGame/GravityFallsLegendOfTheGnomeGemulets video game]] and [[Literature/GravityFallsDipperAndMabelAndTheCurseOfTheTimePiratesTreasure choose-your-own adventure book]] also reveal extra information that give additional context to events in the show proper, including [[spoiler:the meaning behind Bill Cipher's final words]].

* When ''WesternAnimation/LiloAndStitchTheSeries'' was still in production, Jess Winfield kept in touch with the fanbase at TV.com and helped confirm numbers, names, and functions of each experiment featured on the show. With ''WesternAnimation/LeroyAndStitch'', all we need to find out are the remaining functions. Oh, and among other things, he confirmed that [[spoiler:the 628 pod seen at the end of Experiment 627's episode]] was just a throwaway joke.
* There's a lot of info/backstory in ''WesternAnimation/{{Motorcity}}'' that wasn't revealed in the show, but revealed by the creator, crew and the series bible, such as Julie and Claire being ChildhoodFriends, Mike's CoolBigSis Capri, and Julie's mother [[spoiler:having died when Julie was little]]. Since some of the info in the bible (particularly regarding how Dutch and Texas interact with each other) contradicts what we saw in the series, some of this info might not be canon.

* ''WesternAnimation/{{Superfriends}}'' never really explained what became of Wendy, Marvin and Wonder Dog after their disappearance following the original 1973 series, nor did they explain where their replacements the Wonder Twins and Gleek came from, but had explanations provided in the tie-in comic. Wendy, Marvin and Wonder Dog's absence was explained as being the result of them choosing to leave the Justice League to attend college after they graduated high school around the time Zan, Jayna and Gleek arrived on Earth to help thwart a plan by Superman's enemy Grax that they intercepted. Much later, the details given on Zan and Jayna's origins were that they were born with their respective abilities of becoming ice or water-based constructs and animals because they were descended from shape-shifters whose powers weakened throughout the generations from interbreeding with non-powered Exorians, they were orphaned by a plague and forced to work in a circus sideshow by entertaining people with their shape-changing powers, Gleek was a performer at the circus they befriended and the three stumbled upon Earth and Grax's plan after they decided to leave the circus.

* Much information about the ''WesternAnimation/TeenTitans'' could be learned from the ''ComicBook/TeenTitansGo'' comic book, such as Terra's origins and much of Starfire's family.

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** Character descriptions from before the show in the CN website revealed some of their personalities, such as Clayton being a liar, Ocho having anger issues, Hector being a GentleGiant, and Teri being hypochondriac. However, this wasn't shown in the first season at all, only from season two onwards.

** The second All-Avatar [[Magazine/NickelodeonMagazine Nick Mag]], in itself a collaboration of writers of the show and acclaimed comic artists, which contains comics that serve as a bridge for the time jump that occurs between the second SeasonFinale and the season three premiere.

* ''WesternAnimation/StretchArmstrongAndTheFlexFighters'' has a three-issue comic that canonically takes place between early season one episodes. It delves deeper into the backstory of each of the Flex Fighters and reveals Jake's mom's name as Kim. It was even supposed to introduce a villain before the show did, but it was cut short before it got there.

** ''Young Justice: Legacy'' shed some light on what happened during the five year TimeSkip between seasons one and two, as well as introduced a new villain who would've appeared in season three, [[ScrewedByTheNetwork had it not been cancelled]].

** The second annual details the first meeting between Batman and Jason Blood/Etrigan, explaining the case of RememberTheNewGuy in "The Demon Within".

* The supplementary ''WesternAnimation/DocMcStuffins'' book ''Doc [=McStuffins=]'': My World'' states that Doc's father is a chef. This is never mentioned on the series itself.

* ''WesternAnimation/StarVsTheForcesOfEvil'' has "Star and Marco's Guide to Mastering Every Dimension", which contains all manner of information that was never mentioned in the show. This ranges from minor details like the full names of nearly every character, to major backstory for a variety of both major and minor characters, to miscellaneous details about the history and geography of Mewni. Perhaps the most important revelation is the origin story of Glossaryck and the Magic High Commission, some of the most mysterious characters in the show. A {{defictionalized}} version of "The Magic Book of Spells" further expands on the history of Mewni, with the emphasis being the various queens that have ruled over the kingdom up to the present day, and even details that fill in the blanks about the show's mysterious former BigBad Toffee while setting up a GreaterScopeVillain.

* The ''WesternAnimation/TotalDrama Island'' Interactive flash site on Creator/CartoonNetwork had bios for all the 22 contestants. It had very useful information for campers that got voted off early and received little screentime like Ezekiel, Eva, and Noah, but it also revealed a lot about the major characters. For example, Cody and Lindsay are both SpoiledSweet - something the series itself never mentioned.

* Quite a bit of information about ''WesternAnimation/AtomicPuppet'' exists on the show's official website and other promotional material but is never mentioned in the show. For instance, the reason why Captain Atomic can only power up when on Joey's hands is because he was shaking hands with Joey when Mookie turned him into a sock puppet. Additionally, it's stated that Pauline has a CoolUncle who is the owner of the comic shop she works at and taught her everything she knows about comic books and superheroes.

* The ''WesternAnimation/TotalDrama'' Interactive flash site on Creator/CartoonNetwork had bios for all the 22 campers for the show. This had very useful information for campers that got voted off early like Ezekiel, Eva and Noah, who got very little character development.
** It's even useful when it comes to the main characters, for example, it reveals that [[TheWoobie Cody]] and [[DumbBlonde Lindsay]] are both pampered and nice, even though the series itself never mentions how rich they are.
*** In Lindsay's case while it was never said explicitly there are hints tracing back to the first episode that implied she was rich.

** Darwin is Gumball's adopted brother who grew legs when he was overfed, but this was never mentioned in-show for the first season, just in promotional material. This was later [[{{Retcon}} retconned]] by "The Origins", however.

* ''WesternAnimation/StarVsTheForcesOfEvil'' has "Star and Marco's Guide to Mastering Every Dimension", which contains all manner of information that was never mentioned in the show. This ranges from minor details like the full names of nearly every character, to major backstory for a variety of both major and minor characters, to miscellaneous details about the history and geography of Mewni. Perhaps the most important revelation is the origin story of Glossaryck and the Magic High Commission, some of the most mysterious characters in the show. A {{defictionalized}} version of "The Magic Book of Spells" further expands on the history of Mewni, with the emphasis being the various queens that have ruled over the kingdom up to the present day.

* Each episode of ''WesternAnimation/StarWarsTheCloneWars'' is accompanied by a comic (Season 1 only), episode guide, and creator commentary on the official site. While these normally just contain trivial info, they were all but necessary to watch the "Dooku captured" episodes. The comics explained Anakin's voluntary capture and showed how Anakin and Obi-wan got drugged, the episode guide explained how Dooku lost his sabers (the monkey-lizard pickpocketed him!) and the commentary video was Filoni explaining that he believed even Dooku can be captured by pirates if he's sufficiently outnumbered. These were also necessary for determining the chronological order of some of the earlier episodes. Later episodes in the series would normally take measures to avert this by keeping the timeline moving forward. Ultimately, however, almost all of this supplementary material was declared part of the continuity of ''[[Franchise/StarWarsLegends Star Wars Legends]]'' following the Disney takeover, and only the episodes themselves can be considered canon.