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[[quoteright:350:[[WesternAnimation/FindingNemo http://static.tvtropes.org/pmwiki/pub/images/mike_wazowski_cameo.jpg]]]]
[[caption-width-right:350:[[WesternAnimation/MonstersInc Mike Wazowski]] just [[ArcWords keeps swimming]].]]

Unlike a regular television {{crossover}}, the Crossover Punchline is a brief gag. The Crossover is not vital to the storyline, it's just there for the fun of it. Used for laughs, it generally also uses the tropes AllJustADream or AlternateUniverse.

If the two works are owned by the same company, it doubles as CompanyCrossReferences.



[[folder:Anime and Manga]]
* ''Anime/ProjectAKo'' features a blink-and-you'll-miss-it gag at the end of the original OVA, where A-Ko's mother is seen sewing something that looked suspiciously like Franchise/{{Superman}}'s costume. The gag (that A-Ko is Superman and Franchise/WonderWoman's daughter) is made far more explicit in the Creator/AntarcticPress adaptation, where her parents refer to each other as "Clark" and "Diana".
* At one point in ''Anime/TheBigO'', Roger Smith (who's a noted Franchise/{{Batman}} {{Expy}}) is approached by a pair of reporters that look ''exactly'' like Lois Lane and Jimmy Olsen.
* There's a one-shot manga by Creator/OsamuTezuka about a company testing a robot SalaryMan, who proceeds to [[GoingNative go native]] and become a union leader, while at the same time seducing every woman on the staff. After his creators have him assassinated it's revealed all the women in the company have (somehow) had his babies, which confuses the hell out of his best friend, who wonders "What does a robot baby look like, anyways?" Cut to a delivery room full of baby [[Manga/AstroBoy Astro Boys]].
* One episode of ''Anime/CowboyBebop'' ends with Spike ejecting a fridge with some kind of... [[ItCameFromTheFridge thing inside.]] In episode 8 of ''Anime/SpaceDandy'', Meow finds the fridge and eats the whatever-it-is.
* ''Manga/SayonaraZetsubouSensei's'' [[BrickJoke "Seven-year punchline"]], which started back in ''Manga/KatteNiKaizo'' when a character is sealed behind a wall and doesn't appear again until ''Zetsubou'', when she busts out and introduces herself.
* Season 3 of ''Anime/SpacePatrolLuluco'' features references to previous ''Creator/StudioTrigger'' works for four episodes in a row, each one more blatant than the last. Episode 7 confirms the existence of Life Fibers in the universe, features a planet named KLK-X, plays "Before my Body is Dry", and even has an alien that looks like Guts, but ''Anime/KillLaKill'' is not even mentioned once in the episode. Episode 8 takes place on the world of ''Anime/LittleWitchAcademia'' and features an extended cameo from Sucy Manbavaran. The first half of episode 9 is for all intents a purposes a sequel to ''SEX and VIOLENCE with MACHSPEED'', with Luluco shoved into the background. Finally, episode 10 reveals that ''WebAnimation/InfernoCop'' is a member of the Space Patrol. All of this leads up to [[spoiler:TheReveal of Luluco being one of the three mascots of Studio Trigger, Trigger-chan.]]

[[folder:Comic Books]]
* An issue of the ''ComicBook/DarkwingDuck'' comic had Launchpad lament the lack of openings for pilot/sidekicks. We then cut to him insisting he can fly the [[WesternAnimation/ChipNDaleRescueRangers Rescue Rangers]]' plane. While holding it in his hand.
-->'''Gadget:''' No. No, you cannot.
* Didn't happen at the end, but the entire point for a ''Series/StarTrekTheOriginalSeries''/''ComicBook/XMen'' crossover seemed to revolve around Nurse Chapel asking for Dr. [=McCoy=], to which both Bones and Beast turn and say "Yes?", then react with mutual surprise.
* One Marvel comic book featured DC's Death of the Endless at a party, saying she should leave before "that creep Thanos" shows up.
* During Walt Simonson's classic [[ComicBook/TheMightyThor Thor]] run, when Thor was in his civilian identity he stumbled into two familiar-looking reporters named Clark and Lois. The joke here is that Thor has just lost his ability to transform into his mortal form Don Blake, and has just asked ComicBook/NickFury to give him a new civilian identity. Concerned that he could not hide those muscles, Fury gave him [[ClarkKenting a pair of glasses, since "they always worked for that other guy!"]] As Thor goes out wondering if they would work, cue the abovementioned meeting. And as he leaves the pair, a curious Clark looks back at him and wonders....
-->'''Clark:''' "Gee, that looked like... I could have sworn... naaaah."
* Similarly, when Voodoo and Spartan of the ''ComicBook/WildCATs'' were vacationing, they were noticed by familiar-looking honeymooners named [[ComicBook/XMen Scott and Jean]]. Helping the gag is the fact that Jim Lee drew X-Men for years.
* An issue of ''ComicBook/{{Superman}}'' ended with Mr. Mxyzptlk transporting himself to another dimension. He looks about himself, realises where he is and transforms himself into the form he normally wears in this universe; which looks suspiciously like ComicBook/FantasticFour foe the Impossible Man. To clinch the gag, four very familiar sets of legs are seen walking away from him.
* A more serious than usual example - the final (so far) arc of Alex di Campi's anthology series ''Grindhouse'' is a pastiche of 1960s/70s European SF porn comics that ends with a few panels revealing that the story was AllJustADream of a female convict being transported to what is [[LawyerFriendlyCameo heavily implied]] to be the space prison in ''ComicBook/BitchPlanet''.
* In the early numbers of her own series ComicBook/PowerGirl and her friend (the second) Terra are in a movie theater as their civilian identities, when they run into [[Series/TheBigBangTheory Leonard, Sheldon, Howard and Raj]]. Howard tries to hit on the girls with no success.
* In the 700th issue of Superman, which has Supes walking across America to get to know the common man more. He stops at a local diner for lunch. Outside is a reporter very heavily implied to be [[ComicBook/SpiderMan Peter Parker]] sent to do a report on him in which he complains on his cellphone to someone name "J.J" about how mundane the story is.

[[folder:Comic Strips]]
* ''Magazine/{{Dragon}}'' comic strips:
** Annual #5 had all the artists on the regular comics switch places: ''Webcomic/DorkTower'' by Creator/PhilFoglio ended with the reveal that Bill was actually a disguised Dixie of ''ComicStrip/WhatsNewWithPhilAndDixie'', while ''ComicStrip/{{Nodwick}}'' by Creator/JohnKovalic ended with the reveal that it was a DeepImmersionGaming session by the cast of ''Dork Tower'' (with [[{{Munchkin}} Igor]] as a decidedly {{OOC}} Nodwick). (''What's New?'' by Aaron Williams was a more conventional ''Nodwick'' crossover.)
** A later issue had a ''Nodwick'' story called "Epic For A Day", in which a mysterious helmet makes Yeagar temporarily epic-level ... until a portal opens and Phil removes the helmet, takes his derby from beneath it, and gives Yeagar a DopeSlap.
* The October 31, 2010 strip for ''ComicStrip/{{BC}}'' has The Fat Broad running a pumpkin pie stand. The Cute Chick asks her where she found enough pumpkins to make the pies. The Fat Broad says that she just found one really big pumpkin. Cut to [[ComicStrip/{{Peanuts}} Linus, Sally, and Charlie Brown]] in a pumpkin patch with Charlie Brown saying "I don't think he's coming, dude."
** Another strip has Peter looking for a replacement for Thor when the latter goes to hunt raptors. Volunteers include [[WesternAnimation/TheFlintstones Fred Flintstone]], ComicStrip/AlleyOop, and [[WesternAnimation/FamilyGuy Peter Griffin]].
* One of ''ComicStrip/{{Garfield}}'''s "I hate Mondays" gags was prompted by seeing [[ComicStrip/{{Peanuts}} Snoopy]]'s reflection in the mirror.
* References to ''ComicStrip/FamilyCircus'' characters are a RunningGag in ''ComicStrip/PearlsBeforeSwine''.
* 1997 was the year of the Great April Fools' Day Comics Switcheroonie, in which a number of comic strip writers and artists handled each other's strips as a massive practical joke. In several cases characters from different strips met, such as Garfield and Jon having their house painted and leaving to visit [[ComicStrip/{{Blondie}} the Bumsteads]].
* A ''ComicStrip/TheWizardOfId'' strip features the Snowman character mauled by vicious snowmen. His reaction?
--> '''Snowman:''' How did [[ComicStrip/CalvinAndHobbes Calvin]] get in here?
** The [[http://www.gocomics.com/wizardofid/2015/10/30 strip]] for October 30, 2015 shows the eponymous wizard conjuring up a spell involving the use of pumpkin [=DNA=]. When asked what he's doing, the wizard replies that he's "making a dream come true for a special little boy". Cut to [[ComicStrip/{{Peanuts}} Linus]] running for his life out of the pumpkin patch away from "The Great Pumpkin" (er, a giant monster pumpkin).
* An arc in ''ComicStrip/{{Peanuts}}'' had Charlie Brown hallucinating that the sun was a baseball. Eventually, after seeking increasingly bizarre forms of therapy, he checks to see whether his cure was successful... only for the sun to appear as [[spoiler:the face of [[Magazine/{{Mad}} Alfred E. Neuman]]]].
* While it occasionally occurred in the original series, Berke Breathed has started using this trope a lot in the 2015 reboot of ''ComicStrip/BloomCounty''. Usually the guest is another comic strip character (most commonly [[ComicStrip/{{Garfield}} Garfield]] or [[ComicStrip/{{Peanuts}} Snoopy]]), but then you have strips like [[https://static1.squarespace.com/static/529f398ee4b0ee6848fe2724/55cb9e85e4b0a13f76699b0a/5813a279b3db2b2b3a925594/1477681787616/14859690_1342017192495697_9194809047025332943_o.jpg?format=500w this]] and [[https://static1.squarespace.com/static/529f398ee4b0ee6848fe2724/55cb9e85e4b0a13f76699b0a/5815fa10cd0f682fcb9efdca/1477835282678/ack+happens.jpg?format=500w this]].

[[folder:Fan Works]]
* [[spoiler:Despite already being a crossover,]] ''WebAnimation/DoubleRainboom'' has one of these: At the end of the video, where Rainbow Dash is writing her letter to Princess Celestia about why you should not take things that don't belong to you, Pinkie Pie asks "What will I do with this then?", pulling out [[WesternAnimation/FostersHomeForImaginaryFriends Bloo]] from {{hammerspace}}. The Foster's theme tune then plays as the video fades to the ending credits.
* [[http://fav.me/d1bwemo This]] ''WesternAnimation/EdEddNEddy'' fancomic features a surprise appearance of [[WesternAnimation/TheFairlyOddParents Denzel Crocker]] in the last panel, giving an F like he always does.
* Considering the loops allow for cross-overs with almost everything, this is a favorite tactic by a lot of ''FanFic/TheInfiniteLoops'' writers, though there are some who make a conscious effort to not over abuse this.
* At one moment in ''[[WebAnimation/MyLittlePonyMeets Tsum Tsum meets My Little Pony]]'' we get a zoom in to the inside of Apple Bloom's mind, and sure enough, ''WesternAnimation/InsideOut'' characters are seen.
** ''Godzilla meets My Little Pony'' begins with a scene involving ''{{Bambi}}'' characters, ending with Bambi getting crushed by Godzilla. This may seem like a BigLippedAlligatorMoment, [[FridgeBrilliance but then you remember]] ''WesternAnimation/BambiMeetsGodzilla'' is a thing that exists...
* The short fan film "[[https://www.youtube.com/watch?v=JNTDjC84J3E Chasing Jason]]" details a girl named Karen's failed relationship with [[Franchise/FridayThe13th Jason Voorhees]]. At the end, she mentions that she's got a date with a new guy. Turns out it's [[Franchise/{{Hellraiser}} Pinhead]].
* An episode of ''WebVideo/YuGiOhTheAbridgedSeries'' featured Ghost Nappa from ''WebVideo/DragonBallZAbridged'' appearing in the middle and the {{Stinger}}. A special episode revealed that Kaiba was [[spoiler:a robot built by Freiza and Mokuba's real father is Ghost Nappa.]]
* ''WebVideo/NarutoTheAbridgedSeries'':
** An episode ends with the Hokage's funeral, and one of the character telling Konohamaru that he's in a better place. [[spoiler:We then see him crash-landing in front of [[WebVideo/DragonBallZAbridged King Yemma]].]]
** [[spoiler:Seems the Hokage wasn't the ''only'' outer Abridged Series character to be judged Yemma... Go and ask [[WebVideo/JoJosBizarreAdventureAbridged Abdul]]... On second thought, [[BerserkButton don't]].]]
* The episode of ''WebVideo/DragonBallZAbridged'' that abridged the entire first season of the abridged series (Yikes!) features Yami Yugi from ''WebVideo/YuGiOhTheAbridgedSeries'' watching the episode and pondering "[[SelfDeprecation This has... how many subscribers?]]"
* [[https://www.fanfiction.net/s/12128915/1/The-Edit-War-for-Ash-s-Freedom-to-not-be-Betrayed The (Edit) War for Ash's Freedom to not be Betrayed]] ends with this. Darkern Edgier,[[spoiler:after being tricked by Arceus to abandon his shield and be in range, gets kicked out of the Hall of Origins]]. Afterwards, he finds himself [[spoiler:a [[WesternAnimation/MyLittlePonyFriendshipIsMagic black and red Alicorn]] and promptly declares that he will make this world darker and edgier.]] As a result he ends up a lawn ornament.

[[folder:Films -- Animation]]
* ''Disney/TheLionKingOneAndAHalf'': At the film's very end, several characters of the Franchise/DisneyAnimatedCanon show up uninvited at the theater to re-watch the whole movie with Timon and his friends and family.
* At the end of ''WesternAnimation/FindingNemo'' we see [[WesternAnimation/MonstersInc Mike Wazowski]] swimming through the end credits.
* ''Disney/{{Aladdin}}'' is full of them, as Genie assumes the form of Disney/{{Pinocchio}} to accuse Aladdin of lying, and pulls ''Disney/TheLittleMermaid'''s Sebastian out of a cookbook looking for a recipe for King Crab.
* ''Disney/{{Hercules}}'' reveals that Zazu's suggestion that Scar would make "a very excellent throw rug" seems to have been proven true, as Hercules's head dress (later discarded on the floor, like a rug) is Scar's pelt.

[[folder:Films -- Live-Action]]
* At the very end of the 1944 Creator/BobHope film ''Film/ThePrincessAndThePirate'' Bob thinks he's won the girl, only for her to rush past him and into the arms of his [[Film/RoadTo Road Picture]] co-star Music/BingCrosby, who had not been in the picture heretofore.
** Similarly, at the end of ''My Favorite Brunette'', Hope's character is given a last-minute reprieve from execution; Crosby plays the very disappointed prison guard who was going to throw the switch on the electric chair. In a subtle additional gag, the film's heroine and fellow "Road" co-star, Dorothy Lamour, spends a long moment giving a "who is ''that?''" stare in Crosby's direction before being distracted by Hope.
* ''Film/WaynesWorld''. "[[Film/Terminator2JudgmentDay Have you seen this boy?]]"
* In Franchise/MarvelCinematicUniverse films:
** ''Film/IronMan3'''s [[TheStinger Stinger]] reveals that Tony had been telling the movie's story to [[spoiler:fellow Avenger Bruce Banner]] as a sort of therapy session; only to find he had fallen asleep for most of it. Paraphrased:
-->'''[[spoiler:Bruce Banner]]:''' I'm sorry, I'm {{not that kind of doctor}}. I don't have the...\\
'''Tony Stark:''' The what? Training?\\
'''[[spoiler:Bruce Banner]]:''' ''[[YouWouldntLikeMeWhenImAngry Temperament!]]''
** In TheStinger for ''Film/GuardiansOfTheGalaxy'', we are given a look of The Collector's ruined museum, with Cosmo the Dog licking the Collector's hand. Suddenly, a voice says, "Dude, why do you let it lick you like that? Gross!" It's [[spoiler:''Film/HowardTheDuck'']].
** The credits for ''Film/GuardiansOfTheGalaxyVol2'' has various characters dancing to the end credits song, including [[spoiler:the Grandmaster, who would not appear until ''Film/ThorRagnarok''. In the comics, the Collector and the Grandmaster are members of the same species, but as of yet, this gag is the only connection between the two characters in the [=MCU=].]]
** ''Film/SpiderManHomecoming'' naturally has a lot of jokes based around the various Avengers, but premier among them is Captain America's Fitness Challenge, a pre-recorded fitness challenge a la the Presidential Fitness Challenge in the 80s or the [=FitnessGram=] test from the 2000s and 2010s, recorded by Captain America himself. Peter's gym teacher even mentions that he's pretty sure Cap is an international criminal/fugitive now (following the events of ''Film/CaptainAmericaCivilWar''), but he has to show the video anyway.
*** Another scene has Peter watching a group of girls play [=FMK=] with various Avengers. When one of them brings up Spider-Man, the others shoot her down because [[KickTheDog "Gross! He's probably, like, thirty"]].
** ''Film/BlackPanther'': when T'Challa brings [[spoiler:Everett Ross]] back to Wakanda to heal his gunshot wound, Shuri quips (paraphrased) "great, another broken white boy for me to fix". TheStinger reveals that the first was [[spoiler:Bucky, the [[Film/CaptainAmericaTheWinterSoldier the Winter Soldier]], having been given asylum there during TheStinger of ''Film/CaptainAmericaCivilWar''.]]
* ''Film/AbbottAndCostelloMeetFrankenstein'' ended with [[spoiler:the Invisible Man appearing.]]
* A BrickJoke in ''Film/AMillionWaysToDieInTheWest'' about a very racist shooting range leads to TheStinger where [[Film/DjangoUnchained Django]] appears and shoots the owner.
** Earlier, the main character notices a glowing barn making strange noises, and finds [[spoiler: [[Film/BackToTheFuture Doc Brown]] fixing the Delorean.]]

[[folder:Live-Action TV]]
* The epilogue of the series finale of ''Series/{{Newhart}}'' had Bob Newhart waking up in bed on the set of ''Series/TheBobNewhartShow'', next to his wife of the latter series, Suzanne Pleshette, explaining about his nightmare of being an innkeeper.
* The final show of ''Series/NoelsHouseParty'' ended with Noel waking up on the set of his earlier show ''Swap Shop''.
* An episode of ''Series/CarolineInTheCity'' ends with Niles and Daphne of ''Series/{{Frasier}}'' arguing over whether or not the most recent strip is funny.
* The ''Series/{{Seinfeld}}'' episode "The Keys" ends with Kramer appearing on ''Series/MurphyBrown''.
* After the credits of one episode of ''Series/MrShow'', a comic is seen talking to ''[[WesternAnimation/DrKatzProfessionalTherapist Dr. Katz]]''. Especially weird just because Mr Show is live-action.
* One Halloween episode of ''Series/BoyMeetsWorld'' had a witch who wanted to sacrifice the guys in an occult ritual. At the end of the episode, they discuss the incident with another girl: ''Series/SabrinaTheTeenageWitch''.
* A Halloween episode of ''Series/TwoGuysAGirlAndAPizzaPlace'' revealed the killer that had been going around offing the cast to be... Mimi from ''Series/TheDrewCareyShow'', who said she wanted her own time slot.
* An episode of ''Series/TheLucyShow'' had Lucy mistakenly drafted into the marines, driving her drill sergeant insane. When she finally is able to leave, the sergeant is relieved he'll never have to deal with someone as nutty as her ever again. Enter her replacement...[[Series/TheAndyGriffithShow Gomer Pyle]].
* In an episode of ''Series/FamilyMatters'', Richie has a friend over that says Carl "'''does''' look like the Dad from ''[[Series/TheFreshPrinceOfBelAir Fresh Prince]]''!" During the credits, an outtake of this scene was shown. When Richie's friend says line ''this time'', James Avery enters to everyone's amusement (both series were produced by Warner Bros.).
** At least one episode of ''Series/TheFreshPrinceOfBelAir'' turned it back around when Phil told Carlton he didn't want to see his [[Series/FamilyMatters Urkel]] impression again.
* In the final episode of ''Series/{{Coach}}'', Hayden and Christine find that Larry, Darryl, and Darryl from ''Series/{{Newhart}}'' have been watching their cabin after they left for Orlando (not actually living inside the cabin, just watching it while they slept under it). This also doubles as an in-joke, because both shows were created by the same person (Barry Kemp).
* In an episode of ''Series/{{Chuck}}'', Big Mike turns out to be a cousin of [[Film/DieHard Sgt. Al Powell]].
* Series/{{Drake|AndJosh}} once walked into the Series/iCarly kitchen and mistook Carly for his sister Megan.
* The Adam West Batman show often featured a scene where Batman and Robin were climbing up a building with a guest star coming out of the window. On three occasions, a fictional character came out instead. They were Lurch from ''Franchise/TheAddamsFamily'', Colonel Klink from ''Series/HogansHeroes'' and ''Franchise/TheGreenHornet''. ''Franchise/TheGreenHornet'' was the only one who was later featured in an entire episode.

[[folder:Video Games]]
* ''VideoGame/TheSimpsonsGame'' has the penultimate boss fight against Creator/MattGroening -- who attacks you with copies of Bender and Zoidberg from ''WesternAnimation/{{Futurama}}''.
* Most of the endings of ''VideoGame/MarvelVsCapcom3'' and its ''Ultimate'' re-release features the Marvel characters interacting with Capcom characters (whether they appeared as playable characters [[TheCameo or not]]) and vice-versa. Highlights include ''VideoGame/ViewtifulJoe'' working on a film directed by Mojo and Spiral, Hulk storming the mansion setting of ''VideoGame/ResidentEvil1'' with Chris (and [[CurbStompBattle manhandling]] [[VideoGame/ResidentEvil3Nemesis Nemesis]]) and Mr. Fantastic recruiting Frank West to help infiltrate the ''ComicBook/MarvelZombies'' universe, among many others.

[[folder:Web Animation]]
* In episode 8 of ''WebAnimation/InanimateInsanity II'', once the contests reach Meeple headquarters they hear a voice (at the moment unknown to them) belonging to Steve Cobs. When they try to see who the voice belongs to, we see Gamey, the host of ''Object Overload'' (another popular object show), who points them towards Cobs.
* One of the [[MultipleEndings six non-canon endings]] of the last episode of ''Machinima/RedVsBlue'' showed that the whole series was just an overly long Halo 2 multiplayer match.

[[folder:Web Comics]]
* The webcomic ''Webcomic/TheKamics'' has done this [[http://www.theduckwebcomics.com/The_KAMics/4771842/ once]] or [[http://www.theduckwebcomics.com/The_KAMics/4815086/ twice]].
* The [[http://tw-babiez.livejournal.com/17102.html last page]] of ''WebComic/TorchwoodBabiez'' features Franchise/{{Batman}}.
WebComic/PokemonX ends its second storyline by pointing out that the fight that just occurred [[TakeThat had more dialogue than a Yugi-Oh! episode.]] Cue Yugi and Joey reacting.

[[folder:Web Original]]
* Episode 113 of ''WebVideo/TheAngryVideoGameNerd'' features a surprise appearance from [[WebVideo/YouKnowWhatsBullshit the Bullshit Man]].

[[folder:Western Animation]]
* ''WesternAnimation/TheGrimAdventuresOfBillyAndMandy'':
** In the episode "My Fair Mandy", Mandy enters a child beauty pageant in order to show up her arch-rival Mindy, and is coached that she would win if she would simply smile. With great effort, Mandy begins to smile, and [[RealityBreakingParadox reality shatters]], placing Billy, Mandy and Grim in Townsville as distorted [[WesternAnimation/ThePowerpuffGirls Powerpuff Girls]] with Irwin as Mojo Jojo. They even got Tom Kane to play Professor Utonium and Tom Kenny to play the PPG Narrator!
** There are several cameos from [[WesternAnimation/EvilConCarne Hector Con Carne]], of the show they shared a ThreeShorts show with, once saying, "I'm not even supposed to be on this stupid show anymore!"
** The short "Dream Date" ended by revealing it to be a DreamWithinADream within a dream within a dream within [[WesternAnimation/FostersHomeForImaginaryFriends Wilt's]] head.
** In TheMovie ''Billy and Mandy's Big Boogey Adventure'', when they ask who's going to be the Grim Reaper now that Grim's job as reaper has been revoked, [[WesternAnimation/CodenameKidsNextDoor Numbuh 3]] shows up wielding the scythe, and her hoodie is now gray. The two shows did eventually crossover as ''The Grim Adventures of the Kids Next Door''.
** Speaking of the crossover episode, when Billy wore his dad's "lucky" pants, which kicked off the entire episode [[ItMakesSenseInContext and nearly destroyed all civilization as a result]], the KND weren't even the first call he made. No, he called [[WesternAnimation/EdEddNEddy Eddy]] first, who ''then'' directed him to the Kids Next Door once learning that he's. [[OverlyLongGag And then when they show up at his door, he exclaims,]] "Hey, you're not WesternAnimation/ThePowerPuffGirls!" The episode as a whole has at least one character from every series produced for Creator/CartoonNetwork up to that point appear as cameos, and TheStinger features fake posters a number of joke crossovers (''[[WesternAnimation/EdEddNEddy Ed, Edd n]] [[WesternAnimation/TheGrimAdventuresOfBillyAndMandy Mandy]]'', ''[[WesternAnimation/EvilConCarne Evil]] [[WesternAnimation/CampLazlo Camp]] [[WesternAnimation/EvilConCarne Carne]]'', ''[[WesternAnimation/ClassOf3000 Class of]] [[WesternAnimation/CodenameKidsNextDoor Numbah]] [[WesternAnimation/ClassOf3000 3000]]'', ''[[WesternAnimation/MyGymPartnersAMonkey My Gym Partner's A]] [[WesternAnimation/DextersLaboratory Mandark]]'', and ''[[WesternAnimation/SamuraiJack Samurai]] [[WesternAnimation/FostersHomeForImaginaryFriends Mac]]'').
* In the ''WesternAnimation/CodenameKidsNextDoor'' episode Operation: GRADUATE, when hit by the Animalization Ray one of the Delightfuls is transformed into the title character from ''WesternAnimation/SheepInTheBigCity''.
* ''WesternAnimation/{{Sealab 2021}}''
** The ending of the episode "Murphy Murph and the Feng Shui Bunch" revealed that the events of the episode were part of a video game being played by Meatwad and Master Shake of ''WesternAnimation/AquaTeenHungerForce''. ("You hang windchimes for an hour, and then you fight? I don't get it.")
** The "Bebop Cola" episode ends to reveal the entire cartoon was a proposed cola commercial being pitched to the company execs (one played by Murphy's voice actor, the late Harry Goz) by a pair of live-action salesmen.
* ''WesternAnimation/FamilyGuy'':
** The ending of the episode "Da Boom" has it be AllJustADream by Pam Ewing of ''Series/{{Dallas}}'', who finds her husband Bobby in the shower, in a parody of the famous [[TheReveal reveal]].
** In the fourth season, the main plot of one episode is a parody of ''Film/{{Poltergeist}}'', which has Peter replicating the scene where a character pulls the skin off his face while looking in the mirror. When it all comes off, he has turned into [[WesternAnimation/KingOfTheHill Hank Hill]]:
--->'''Peter/Hank:''' Hehehehehehe. Propane.
** On the fifth season finale "Meet the Quagmires", after Peter apparently fixes every problem from his screwing with the timeline, Roger Smith from ''WesternAnimation/AmericanDad'' suddenly appears.
** In "Lois Kills Stewie" (which was just a [[AllJustADream simulation]]) Stewie breaks into the CIA and is confronted by Bullock and Stan, the latter of which Stewie mistakenly calls "Joe", lampshading how Stan [[ReusedCharacterDesign looks like Joe Swanson with black hair]].
** During a ''Series/PoliceSquad'' spoof you get a JawsFirstPersonPerspective of Stewie running down [[WesternAnimation/TheSimpsons Homer Simpson]] as he parks in the garage.
--->'''Peter (looks down at Homer):''' Who the hell is that?
** There's an episode that has a miniature Marge appear at the bottom of the screen and at first, it seems like one of Fox's advertisements... until a miniature Quagmire attempts to rape her.
** In the episode "The Splendid Source", Peter and his friends are going around the country questioning people about where they heard a particular joke. At one point we see them asking Bender from ''WesternAnimation/{{Futurama}}''.
** In "Excellence in Broadcasting" the normally far left-leaning Brian finds himself being swayed to the right wing views of [[InkSuitActor guest star]] Radio/RushLimbaugh. We switch to Ultra Conservative [[WesternAnimation/AmericanDad Stan Smith]] watching the episode saying "Good. Good for Brian."
** A cold opening for one episode crosses over with ''WesternAnimation/AmericanDad'', which turns out to be a DreamWithinADream of [[WesternAnimation/KingOfTheHill Hank Hill]].
** At the end of the ''Film/SpiesLikeUs'' parody episode, a rocket wipes out [[WesternAnimation/TheClevelandShow Cleveland]]'s new home, sending Cleveland in his bathtub crashing to the ground, a ''WesternAnimation/FamilyGuy'' running joke. Cue Tim the Bear to walk out a second later.
--->'''Tim:''' I don't get it!
** In the episode "The Simpsons Guy" (itself a crossover with ''WesternAnimation/TheSimpsons''), the judge in the second half of the episode is [[WesternAnimation/TheFlintstones Fred Flintstone]].
** Later in the same episode, when Kang and Kodos are watching Homer and Peter fight each other, Roger suddenly appears on their spaceship... right before Peter and Homer crash into it.
*** [[OverlyLongGag Earlier]], Peter sets up a CutawayGag with him and Homer fighting in a plane where a third pilot is revealed to be [[WesternAnimation/BobsBurgers Bob Belcher]]. This turns out to just be the setup to [[SelfDeprecation a joke about]] ''WesternAnimation/TheClevelandShow''.
** In "Ratings Guy", just after Peter arrives at the Television Producers Guild to make up for ruining the state of television, Homer Simpson (complete with Creator/DanCastellaneta voicing him) runs in with the same problem Peter has, prompting Peter to gloat about [[ItsBeenDone having one over him]].
** In "Killer Queen" after finding a boy attending fat camp with them dead Peter wonders who would kill a camper, at which point [[Franchise/FridayThe13th Jason Voorhees]] says [[NotMeThisTime not to look at him]], as he was just there to drop off his son.
*** [[WesternAnimation/AmericanDad Barry Robinson]] also appeared in this episode but had no real lines.
** Really due to the [[ReferenceOverdosed nature]] of the show, there are too many here to list them all.
* [[WesternAnimation/TheSimpsons Homer Simpson]] appeared at the end of one episode of ''WesternAnimation/{{Duckman}}''.
* ''WesternAnimation/TheSimpsons'' has several examples:
** The cameo appearance of the ''WesternAnimation/KingOfTheHill'' cast in the episode "Bart Star": after a football game ends, Hank shows up and proceeds to complain about it not being worth driving 2000 miles for and, if you look closely, Dale and Boomhauer can be seen in the stands as well.
** As might the throwaway gag of the ''WesternAnimation/{{Archie}}'' gang throwing Homer out of a van and warning him to "stay out of Riverdale". He is later seen reading an Archie comic and muttering under his breath about "stuck-up Riverdale punks".
*** A later episode, "How Lisa Got Her Marge Back", had the Riverdale gang pulling a prank on Bart before mourning Archie (a reference to Archie's death in ''ComicBook/LifeWithArchieTheMarriedLife'').
** In a WesternAnimation/TreehouseOfHorror episode, Homer makes multiple clones of himself. [[WesternAnimation/FamilyGuy Peter Griffin]] can be seen [[TakeThat amongst the clones]].
** Similarly, in one episode the police have photos of several criminals wanted in Italy. Two of them are Peter Griffin (for plagiarism) and [[WesternAnimation/AmericanDad Stan Smith]] (for plagiarism of plagiarism).
** In another episode, Future-Drama, Bender from ''WesternAnimation/{{Futurama}}'' appears next to Bart and Homer after they travel through a time tunnel. Homer quickly proceeds to tell him to "get lost" and chucks him out of a moving vehicle.
** He appears again later in the Simpsons basement as a callback to the actual crossover ''Simpsorama'' they now use him as a safe.
** He appears again during [[LiveEpisode "Homer Live"]] holding up a sign saying "Bring back Futurama [[UnCancelled (again)]]".
** [[WesternAnimation/{{Futurama}} Philip J. Fry]] also appears briefly in a couch gag.
** Another CouchGag involved WesternAnimation/RickAndMorty crashing into the Simpsons household, killing the family in the process. Rick sends Morty off to get the family cloned, while Rick loots their house and freezes Ned Flanders.
** Another couch gag has the Simpsons running in only to find ''WesternAnimation/TheFlintstones'' in their place.
** The couch gag for the first episode of season 28 is [[https://www.youtube.com/watch?v=E8gDvbsYd0Q a reanimation]] of the ''WesternAnimation/AdventureTime'' opening, complete with parody lyrics and ContinuityPorn.
** In one Treehouse of Horror wherein Homer travels through time, Kang and Kodos turn into Mr. Peabody and Sherman from ''WesternAnimation/RockyAndBullwinkle'' [[TemptingFate after saying that]] the PunyEarthling [[HypocriticalHumor was unprepared for the effects of time travel]]. Doubles as a BrickJoke because they were seen near the beginning of the short [[ItsBeenDone correcting Homer saying he was the first non-Brazilian person to travel through time.]]
** In one episode set in an insane asylum we see a number of the inmates... including [[WesternAnimation/TheCritic Jay Sherman]].
--->'''Jay Sherman:''' [[CatchPhrase It stinks! It stinks! It stinks! It stinks!]]\\
'''Asylum Attendendant:''' That's right, Mr Sherman. Everything stinks.
** He returns, with every other character Creator/JohnLovitz has ever played in the show, to greet Artie Ziff at Moe's. Artie calls them [[HypocriticalHumor weirdos.]]
** In yet another episode Homer is forced to find another bar after getting kicked out of Moe's and at one point finds himself at ''Series/{{Cheers}}''
* One episode of ''WesternAnimation/{{Chowder}}'' has a character waiting for a blind date. In walks Sara Bellum from ''WesternAnimation/ThePowerpuffGirls'' -- but she's not his date.
* ''WesternAnimation/RobotChicken'':
** One sketch parodying ''Franchise/SpiderMan'' featured a teenage boy getting bitten by a [[ILoveNuclearPower radioactive deer]] and becoming [[AnimalThemedSuperBeing "Kid]] [[WhatKindOfLamePowerIsHeartAnyway Venison"]]. At the end of the sketch he is hit by a car. After this we see a sketch parodying ''Franchise/{{Terminator}}'' which ends with Sarah Connor hitting Kid Venison with her car.
** TheStinger for the [[ADayInTheLimelight Bitch Pudding Special]] has Nick Fury appear, presumably to offer her a place in Film/{{The Avengers|2012}}. She then proceeds to car-jack him.
* ''WesternAnimation/AmericanDad'':
** An episode features Stan name his top ten favorite fictional dogs. The #1 spot belongs to Brian from ''WesternAnimation/FamilyGuy'' who appears and doesn't know who Stan is.
--->'''Stan:''' [[TakeThat STOP PRETENDING I DON'T EXIST!]]
** In the episode "The Unbrave One", Francine takes several online pregnancy tests from a shady gynecologist named Dr. Vadgers, most of which involve naked close-ups. The end of the episode shows Dr. Vadgers's computer screen, then reveal him to be [[WesternAnimation/FamilyGuy Quagmire]].
** After the family's house is washed away in a hurricane it arrives next door to [[WesternAnimation/TheClevelandShow Cleveland's]]. At which point [[WesternAnimation/FamilyGuy Peter Griffin]] appears and the three are armed with guns at each other. Then Stan accidentally shoots Francine:
--->'''Peter:''' Heh-heh-heh-heh-heh-heh. Classic ''American Dad''.
* An episode of ''WesternAnimation/TimeSquad'' had Buck and Larry abandon Otto after a fight and try out several replacement orphans... including [[WesternAnimation/DextersLaboratory Dexter]], who protests he's not an orphan.
* ''WesternAnimation/HouseOfMouse'' had one in one of its episodes. With ''WesternAnimation/PepperAnn'' of all shows! But considering it's a MassiveMultiplayerCrossover, nine-tenths of the jokes are going to be this.
* ''WesternAnimation/FostersHomeForImaginaryFriends'':
** The pilot also has an imaginary friend who is [[WesternAnimation/ThePowerpuffGirls Mojo Jojo]]; according to Wilt this is pretty common since "some kids aren't that creative, so they just copy what they see on TV."
** A quick joke in one episode shows [[WesternAnimation/TheGrimAdventuresOfBillyAndMandy Mandy]] returning an imaginary friend, saying it was too happy. To make it funnier, said scene is just in Bloo's imagination.
* ''WesternAnimation/{{Animaniacs}}'' would occasionally cross the characters of its various shorts for a quick gag. A couple times, the Warners would be at a loss for how to deal with their current problem and eventually resort to recruiting another character: they took care of [[WesternAnimation/TinyToonAdventures Elmyra]] by heading for Mindy and Buttons' neighborhood and letting her fill Buttons' usual BadlyBatteredBabysitter duties; and for a lady with KarmicProtection as a genuine (if overbearingly) [[NiceGuy Nice Girl]] they hired Slappy Squirrel, who had no such scruples. In yet another short, it was revealed that the dragon they just beat was actually a machine controlled by WesternAnimation/PinkyAndTheBrain.
* In ''WesternAnimation/{{Ultimate Spider-Man}}'', the Living Laser is thrown into a dimensional rift, and comes out in the world of ''WesternAnimation/TheSuperHeroSquadShow'', getting promptly beaten up by SHS-Thor.
* An episode of ''WesternAnimation/RoadRovers'' had the villain being incarcerated in an insane asylum for megalomaniacs. The inmates end up yelling at each other from their cells, arguing about about who is going to rule the world, until at the end a familiar voice is heard...
-->'''[[WesternAnimation/PinkyAndTheBrain The Brain]]''': No, it is '''I''' who shall rule the world! YES!\\
''(the closing theme of'' Pinky and the Brain ''is heard as the episode fades to credits)''
* In an episode of ''WesternAnimation/Ben10Omniverse'' about a store that shifted between dimensions, when Ben first enters the store it's populated by alien versions of WesternAnimation/CowAndChicken.
* One episode of ''WesternAnimation/OggyAndTheCockroaches'' has Oggy and the cockroaches falling into acid and turned into slime, and they enter a washing machine, which turns them into clothing, animals, then aliens... except that the "aliens" are clearly the titular characters of ''WesternAnimation/SpaceGoofs'' (both of which were produced by France's Gaumont studio).
* ''WesternAnimation/LooneyTunes'': Not counting "all-star" outings, there have been several instances of characters appearing in another character's starring roles.
** Near the end of the 1942 spot-gag short ''Crazy Cruise'', a group of rabbits are seen defending themselves from a Japanese vulture by donning air raid helmets and shooting a cannon at it. One of the rabbits, whose face has been obscured from the viewer, turns out to be WesternAnimation/BugsBunny, who tells the audience "Thumbs up, doc!" before the IrisOut closes on his ears, which form [[WartimeCartoon a "V" for victory]].
** In the 1943 short ''WesternAnimation/PorkyPigsFeat'', [[WesternAnimation/PorkyPig Porky]] and [[WesternANimation/DaffyDuck Daffy]] are being held prisoner in their hotel room for not paying and wonder what Bugs Bunny would do in a situation like this. They decide call him up and, after he offers ideas they already tried and failed at, the door opens to reveal Bugs chained up in the room next to theirs ("Aah, don't work, do they?").
** In the 1954 short '"Dog Pounded'', Sylvester tries to retrieve Tweety from a dog pound by [[AssInALionSkin disguising himself as a skunk]] to scare the dogs away. It nearly works until he suddenly becomes the object Pepe Le Pew's affection.
** In the 1954 short ''No Barking'', an alley cat tries to catch a bird from a tree, only for a dog to yap loudly give him a JumpScare that sends up flying up. The bird in the nest is revealed to be Tweety, who says [[CatchPhrase "I tawt I taw a putty tat"]]. He reappears at the end, watching the cat sent flying again and grasping an airborne jet, saying "I ''did'', I did taw a putty tat!"
** The 1955 short ''Sahara Hare'', in which Bugs winds up in the Sahara Desert while digging his way to Miami Beach, ends with an appearance by Daffy Duck, [[HereWeGoAgain who is also going to Miami]].
** The 1959 short ''Apes of Wrath'', in which a drunken stork delivers Bugs to a gorilla couple, ends with said stork giving Bugs his own "baby": Daffy!
** In the 1964 short ''False Hare'', a wolf and his protege disguise themselves as rabbits to lure Bugs into a trap disguised as a "rabbit club". After several failed attempts at catching him, the wolf gives up and says he's starting a "chicken club" and Foghorn Leghorn immediately appears to join.
** In the recent CGI short ''Flash in the Pain'', Wile E. Coyote tries to catch the Road Runner by using a teleportation belt. When the belt malfunctions, Wile E. suddenly finds himself in Tweety and Sylvester's domain.
** Let's not forget the famous ending to ''WesternAnimation/DuckAmuck''.
* An ''extremely'' subtle example comes from, of all things, ''WesternAnimation/RickAndMorty'' and ''WesternAnimation/GravityFalls''. In "Close Rick-counters of the Rick Kind", Rick opens up various portals to throw off the alternate Ricks pursuing him. A pad, pencil and coffee mug randomly drop out of one portal. In the ''Gravity Falls'' episode "Society of the Blind Eye" [[spoiler:when Grunkle Stan is fiddling with the portal]], those exact items get sucked in. The coffee mug even has a question mark on it in both shows.
* In the ''WesternAnimation/{{Freakazoid}}'' episode "[[Series/QuantumLeap Quantum Freak]]", Freakazoid "prevents World War II"[[note]]which had actually been ongoing for two years in the rest of the world[[/note]] by preventing the Japanese assault on Pearl Harbor, then goes back to the present time to [[RippleEffectProofMemory see what changes it brought]]. Similar to the episode's beginning, UsefulNotes/AirForceOne is in peril and its pilot bailed, only this time the president is [[WesternAnimation/{{Animaniacs}} The]] [[WesternAnimation/PinkyAndTheBrain Brain]], and the staffer trying to fly the plane is now Pinky.
** Another episode featured [[WesternAnimation/{{Animaniacs}} Wakko]] appearing along with the Brain. They all argue over which of their cartoons is StevenSpielberg's favorite. They go to Spielberg himself and ask him to which he simply says, "Who are you people?".
* The George Pal Puppetoon "Jasper Goes Hunting" has Jasper and Scarecrow encountering an ink-and-paint WesternAnimation/BugsBunny, who is ushered in the scene with an ersatz rendition of the Merrie Melodies theme. Bugs soon realizes he's in the wrong picture and dives back into his hole.
* The ''WesternAnimation/DextersLaboratory'' episode "Dad Is Disturbed" had Mom interrupting Dad's golf game by talking on the phone with "Betty". Dad gets her to stop by going to the other end, revealing that Mom was talking with a modern version of Betty Rubble from ''WesternAnimation/TheFlintstones''. At the episode's end, he goes back to the same house to watch the game with Barney.
* ''WesternAnimation/{{Futurama}}'':
** One episode had Fry, Leela and Bender go into the sewers to rescue Nibbler, when Leela pulls up a manhole cover. On the manhole cover was a picture of ''WesternAnimation/ThePJs'' as well at the show's title. They returned the favor in the episode "Cliffhangin' With Mr. Super" by having a shot of a milk carton with a "missing persons" alerts on the side. The missing person? Philip Fry, who by that time was cooling his heels in cryo-freeze.
** A later episode had Bender running into [[WesternAnimation/AdventureTime Finn the Human and]] [[CastingGag Jake the Dog]] and telling him to shut the hell up.
* The crossover between ''WesternAnimation/UncleGrandpa'' and ''WesternAnimation/StevenUniverse'' ends with Uncle Grandpa reading a piece of paper listing characters from current and past Cartoon Network shows- plus, [[UnexpectedCharacter of all shows]], the [[WesternAnimation/SwatKats SWAT Kats]].
* The ''Uncle Grandpa'' episode "Pizza Eve" has a segment in which Uncle Grandpa is giving out "Grampies", and many characters from currently-airing and past Cartoon Network shows are attending. As one might expect when Uncle Grandpa is the host, he sweeps all the awards (including the "best ''Steven Universe'' episode" award), which is likely a TakeThat to the ''Kids Choice Awards'' over on Creator/{{Nickelodeon}} and how they tend to favor Nicktoons over all other shows.
* An episode of ''WesternAnimation/ThePowerpuffGirls'' had the girls battling an evil ImaginaryFriend; when their efforts prove fruitless, they realize they need their own imaginary friend. Bubbles starts to suggest the Koosalagoopagoop from ''WesternAnimation/DextersLaboratory'', only for Buttercup to shoot her down by saying "Not that Koos jerk!"
* An episode of ''WesternAnimation/{{Archer}}'' had the title character take on the persona of [[WesternAnimation/BobsBurgers Bob Belcher]]. The other Belcher family members appear, but only Linda has dialogue.
* An episode of ''WesternAnimation/TheFlintstones'' featured Fred and Wilma having a picnic. Their basket is stolen by none other than ''WesternAnimation/YogiBear''.
* Occurs in the Season 5 finale of ''WesternAnimation/{{Ninjago}}''. When Lloyd and Morrow have their battle, they wind up through several parallel realms, one of which being [[WesternAnimation/LegendsOfChima Chima]].