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* In the original short Finn [[JohnCarterOfMars mentally projects himself to Mars]].
* The position Jake assumes at the end of the opening and [[http://static.tvtropes.org/pmwiki/pub/images/Adventure_Time_5422.png this picture]] is reminiscent of [[http://static.tvtropes.org/pmwiki/pub/images/conan_frazetta_3199.jpg this picture]] in ''Franchise/ConanTheBarbarian''. Finn doesn't mimic Conan's position though.
* One promo after "Freak City" has [[http://www.youtube.com/watch?v=OQSNhk5ICTI the double rainbow video]] recreated with [[http://www.youtube.com/watch?v=ByIAseO8RFA Jake witnessing two Rainicorns]].
* Marceline calls Finn a [[VideoGame/CastleCrashers Castle Crasher]] in her second episode.
* In "The Duke", one of the potions Finn and Jake are messing around with is labeled "[[LOLCats Caturday Surprise]]."
** In the fake ambush that Finn and Jake set up, they do the infamous flying kick exchange from ''FistOfTheNorthStar.''
* Billy's sword is called Nothung, the name of Siegfried's sword in ''Theatre/DerRingDesNibelungen''.
* The title card of "His Hero" is a nod to Creator/FrankFrazetta's Death Dealer.
* Finn's plastic surgery turns Lumpy Space Princess into a [[WesternAnimation/DuckTales Gizmoduck]] lookalike.
* After being freed from prison in "What Have You Done?", the Ice King loudly proclaims "[[TabletopGame/DungeonsAndDragons CAST DETECT SECRET DOORS!]]" before blasting a hole to freedom.
** Mind you that happens in a room that has been proven to have at least 2 real hidden doors.
* The horse in "The Eyes" is based on the Fat Shetland Pony from ''HarkAVagrant''.
* The Ice King is shown in one episode to have a [[Memes/{{Music}} "Ring, Ring, Ring, Ring,]] '''[[EarWorm banana phone]]'''"
* The [[http://therealscratchpad.files.wordpress.com/2010/05/adventure_time_with_finn_jake.png series title card]] is styled after the ''TabletopGame/DungeonsAndDragons'' [[http://paizo.com/image/content/DNDMovie2Logo/Movie2Logo_500.jpg 3rd Edition logo]] and [[http://www.anotherworld.fr/download/AnotherWorld_Poster.jpg the cover art]] of the game ''VideoGame/AnotherWorld''. However, the animation of the title card seems to be based off of the title screen of ''VideoGame/TheLegendOfZeldaALinkToThePast'', complete with the flash that occurs when the sword is inserted into the title words.
* The episode "Guardians of the Sunshine" is FULL of references to video games.
** It uses sound effects from many games, particulary ''VideoGame/MegaManClassic''.
** It also makes a few SuperMarioBrothers references, like level-1, and the Bomba (Bob-omb).
** Finn's face turns into Pong at one point.
* In "Power Animal," Finn busting out of his restraints is a reference to ''Film/TotalRecall1990.''
* One of the zombie Candy People in "Slumber Party Panic" tells Princess Bubblegum to [[Film/ArmyOfDarkness "Gimme some sugar, baby."]]
* The episode "Dungeon" featured a number of [[TabletopGame/DungeonsAndDragons DnD monsters]], such as the mimic, the trapper (pretends to be the floor), and a ''gelatinous cube''.
** And "Wizard Battle" has a [[http://bogleech.com/dnd/atcrawler.jpg brief cameo]] by a classic [[http://www.bogleech.com/dnd/crawlerpage.jpg Carrion Crawler]].
* In "My Two Favorite People", Finn, Jake, and Lady Rainicorn encounter a wizard who is handing out power rings. Finn also wears 10 rings his hands with each one displaying a different power, just like the ComicBook/IronMan villain The Mandarin.
* [[http://www.formspring.me/natazilla/q/198875991685227093 According to Natasha Allegri's Formspring]], Fionna and Cake are based on a certain [[Franchise/SailorMoon planet-themed magical warrior girl and her talking black cat]]. The rabbit hat is a dead giveaway.
** [[http://s3.amazonaws.com/data.tumblr.com/tumblr_lq5ofdlL4F1r193sio1_1280.jpg The dress Fionna wears in the episode]] is another ShoutOut to ''Anime/SailorMoon''.
** Fionna's sword in "The Prince Who Wanted Everything" appears to be ''Sailor Moon'' themed, with its bow and ribbons.
* The robot orb-looking things that Fionna slashes at in "Adventure Time with Fionna and Cake" were based on the farm-intruding enemies from ''TheLegendOfZeldaMajorasMask''.
* "Mortal Recoil" contains a bunch of clear references to ''Film/TheExorcist'' and ''TheGrudge''.
** Also from "Mortal Recoil", the view through the Ice King's "wizard eyes" could be a reference to HPLovecraft's short story "From Beyond".
* The tagline for the movie "Heat Signature" is "Under the ocean, no one can hear you die". This is a reference to the tagline for the movie ''Film/{{Alien}}'' (1979): "In space, no one can hear you scream."
** The look and CallingYourAttacks nature of the "Vampire Kick" may be a reference to ''Franchise/KamenRider''.
* In "Morituri Te Salutamus" just before one of the fighters dies, he says something along the lines of, "''[[EtTuBrute Et tu, Verus?]]''" which is a reference to ''Theatre/JuliusCaesar''.
** There's also Finn introducing Jake by saying [[MemeticMutation "Yes, this is Dog"]].
* The "Susan Strong" title card is a reference to ''Series/{{Lost}}''. There was also a "''Lost'' pan" in the storyboard that got cut from the episode.
** Not to mention how Susan Strong & Co also lived underneath a Hatch...
** One of the fish people is wearing what looks like a Pedo Bear costume.
* The title card for [[http://www.flickr.com/photos/84568447@N00/4535585912/in/photostream/ The Enchiridion!]] was inspired by a [[http://www.flickr.com/photos/84568447@N00/4534953435/in/photostream/ ''Science Fiction'' magazine cover]].
* Ash erasing Marceline's memory of her breaking up with him was slightly inspired by EternalSunshineOfTheSpotlessMind.
** The entire memory sequence is a reference to ''BeingJohnMalkovich'', what with the shifting gravity, various doors through memories, and the nature of being inside someone's head.
** It can also be seen as a refrence to {{Inception}} with the extraction of an idea from a dream.
** Jake's GiantFootOfStomping is, of course, a reference to ''Series/MontyPythonsFlyingCircus''.
* The Lich King is a horned, ridiculously scary, skull-faced monarch who can raise skeletons and whose power lies in a pit of green ooze. Compare to [[TheBlackCauldron The Horned King]], a horned, ridiculously scary, skull-faced monarch who can raise skeletons and whose power lies in a pit of green ooze.
* The game Dropball, played by Ghost Man in "Blood Under The Skin," is a ShoutOut to BulletBall, the high calibre tablegame designed for the 21st-century lifestyle that went memetic after creator [[HopelessAuditionees Marc Griffin's]] memetically depressing/hilarious [[http://www.youtube.com/watch?v=WOOw2yWMSfk appearance]] on ''AmericanInventor''. Ghost Man's voice sounds quite a bit like Marc Griffin's and several of his lines are quotes from the ''American Inventor'' episode.
* Finn's method of curing the zombies in "From Bad to Worse" is to [[Recap/DoctorWhoS28E1NewEarth douse himself with the antidote and walk into a mob of them so they all touch him.]]
* The title card for [[http://images.wikia.com/adventuretimewithfinnandjake/images/1/1a/Beautopia_title_card.jpg Beautopia]] references the famous [[http://www.theprojectasylum.com/collections/postcards/nj-postcards/nj-asburypark-greetingsfromasburypark.jpg Greetings From Asbury Park, N.J. postcard]].
* The episode "No One Can Hear You", references ''Film/{{Alien}}'' when [[spoiler:the candy people are shown to be stuck to the walls of the sewer with a goo, like the Xenomorphs do the their victims.]] Even the title is borrowed from the {{tagline}} of the movie: "In space, '''no one can hear you''' scream." [[EpisodeFinishesTheTitle Finn and Jake are screaming in the title card]].
** On the opposite end of the spectrum, Finn's casts breaking is really similar to ForrestGump's leg braces.
* [[http://images3.wikia.nocookie.net/__cb20111114220429/adventuretimewithfinnandjake/images/1/14/Me-mow.png The crew made an episode in honor of a little kid and his drawing of her original character, Me-mow, fighting Jake, which he titled "Jake vs. Me-mow".]] Appropriately, the episode is called "Jake vs. Me-mow".
** The music box Finn uses to accompany the lullaby is strongly similar to the Orb of Isis in ''WesternAnimation/TheSimpsons'' episode "Lost Our Lisa."
* The Bucket Knight from "Dungeon" is a shout-out to the Alternian Imperial Drones from ''Webcomic/{{Homestuck}}''. The artists are confirmed to be fans: a picture of their whiteboard shows doodles of the main characters.
* From "Paper Pete" we have: "[[Creator/KateBeaton YISS!!]]"
* In "Dad's Dungeon", one of the Fruit Witches tries to convince Finn to "[[Literature/TheBible Partake of the fruit...]]"
* The first issue of the comic shows a cross-section of the ground... including a [[Webcomic/DinosaurComics fossilized T. rex about to stomp on a house]].
** Well, seeing as the comic itself was ''written'' by Ryan North...
* The episode "Wizard Battle", the Grand Wizard states that wizards will fight using the eight schools of magic. This is likely a reference to ''TabletopGame/DungeonsAndDragons''' eight schools of magic.
** In the same episode, the Wizard Abracadaniel shouts "Cantrip!" upon casting. In D&D, a cantrip is a minor spell typically only useful as a distraction in combat (incidentally, exactly the kind of [[UselessUsefulSpell magic]] [[SpoonyBard Abracadaniel]] uses.)
* In "Dad's Dungeon", Finn and Jake come up to a fork in the passage. One path has magical flowers. The other has a giant monster that says [[Film/MontyPythonAndTheHolyGrail "None shall pass!"]]
* In "Five Short Graybles" has Princess Bubblegum making a [[WallaceAndGromit familiar toothy smile]] while enthusiastically saying "CHEEEESE".
* In "Dream of Love", during the movie night, we see a guy saying [[Advertising/TheManYourManCouldSmellLike "Look at this cup. Now look at this cup!"]]
** And an [[WesternAnimation/SouthPark elephant hooks up with a pig.]]
* "Princess Monster Wife" alludes to [[GreekMythology Perseus and Medusa]] when Finn and Jake use mirrors in order not to gaze upon the titular monster's hideousness directly, though they are only in danger of fainting instead of being turned into stone.
** While trying to reassure Monster Princess that she's normal, Ice King refers to her as his "beautiful [[ThePrincessBride princess bride]]."
* The episode "Goliad" and its eponymous character are named after Goliad, Texas. While [[RememberTheAlamo the place figures in Texas history]], there's no intended deeper meaning in the show; [[http://www.formspring.me/jessemoynihan/q/334526374276526286 the episode's writer just thought]] "Goliad" [[AwesomeMcCoolname sounded cool]].
* In "Beyond This Earthly Realm", Jake sounds like [[Franchise/StarWars a Wookiee]] when he yawns.
** While we're talking about "Earthly Realm", Ice King says that Finn "[[Music/MCHammer can't touch this!]]"
* The Card Wars game is a homage to ''TabletopGame/MagicTheGathering''. After doing great with no prior experience playing, Finn calls himself a "Card Wars Super Film/{{Amadeus}}".
** Jake's use of Corn warriors may be a reference to ''TabletopGame/{{Warhammer}}'' and the Chaos god Khorne.
* The internet game [[http://www.cartoonnetwork.com/games/adventuretime/rhythm-heroes/index.html "Rhythm Heroes"]] is clearly a parody of ''VideoGame/RhythmHeaven''.
* In "Wizard", Finn proclaims that he wants ALL THE STAR BADGES and strikes a pose similar to the "All the Things!" meme made famous by ''Webcomic/HyperboleAndAHalf''.
* Earl of Lemongrab is an allusion to Mary Shelley's novel "Frankenstein." Like Frankenstein's Monster, he is a science experiment gone wrong who is rejected by his creator and forced to live in isolation. Lemongrab is also an allusion to Lovecraft's "Herbert West: Re-Animator," in which a mad scientist brings to life corpses, which become screaming, unintelligent psychos after he injects them with chemicals.
** His name is a pun on Lemon Drop candy.
* In "Sons of Mars", [[spoiler: Abraham Lincoln]] gives Jake (as Magic Man) two choices of execution. The first is total annihilation, the second is convert his body to living stardust. During the second description, his heads floats amidst color bars that looks like "Jupiter and Beyond the Infinite" in ''Film/TwoThousandOneASpaceOdyssey''.
* In "King Worm", Finn is [[Literature/NineteenEightyFour trapped in a room full of his fears]] (being in water).
** A very likely shout-out given the mid-episode reveal of AllJustADream and accompanying [[TheUnreveal Unreveal]].
* In "Lady & Peebles", [[spoiler:Ricardio]] closely resembles [[VideoGame/TheLegendOfZeldaMajorasMask Majora's Incarnation]]. That part of the episode's storyboarder, Rebecca Sugar, is known to be a Zelda fan.
** Also from that episode, PB gives Ice King [[spoiler: a new heart]] partially made of maracas, which he then shakes while speaking vaguely Spanish phrases. This is possibly a reference to [[http://en.wikipedia.org/wiki/Charo Charo]], a Spanish-American actress probably best known for appearing on ''Series/TheLoveBoat'' and "[[WesternAnimation/TheSimpsons shaking her maracas]]".
** The design of the Black-Ice Cave itself was inspired by ''VideoGame/EternalDarkness'' and ''VideoGame/AmnesiaTheDarkDescent''.
** PB's Heart Signal Tracker is reminiscent of the Motion Tracker from ''Film/{{Aliens}}''
* The entirety of the final conversation in "Ignition Point" references ''TabletopGame/DungeonsAndDragons'' (specifically the CharacterAlignment aspects) multiple times.
** It also (rather blatantly) references ''Theatre/{{Hamlet}}'' with the acting troupe and Jake coming up with the plan from the play by himself to find those who plan to kill the Fire King. A portion of Hamlet's "To be or not to be" Soliquly is heard earlier as well, and it turns out that the Flame King played the Cladius, with the two plotting against him being would-be Hamlets, the Flame King's nephews whose father the Flame King killed to take the throne. This is common knowledge, and no one minds because ''everyone'' in the Flame Kingdom is evil.
** In the scene with the fire snake, Jake uses its hissing to say "[[WesternAnimation/LooneyTunes Ssssuffering ssssuccotash]]"
* In "The Hard Easy", [[spoiler: the Mega-Frog turning back into Prince Huge is oddly reminiscent of the transformation sequences from ''Anime/SailorMoon''.]]
** [[spoiler: The predicament of Prince Huge in itself is already a homage to the fairy tale ''The Princess And The Frog''.]]
* In "Reign of Gunters", Gunter's pink kitten is revealed to have telekinetic and energy powers, which is reminiscent of [[Franchise/{{Pokemon}} Mew]].
* The book 'Mind Games' and its author Jay T. Dawgzone seem to be a shout out to [[http://en.wikipedia.org/wiki/The_Pickup_Artist_(TV_series) The Mystery Method and its originator, Mystery]].
* In "I Remember You", Jake imitates DiedrichBader's [[WesternAnimation/BatmanTheBraveAndTheBold Batman]].
* The leader of the Destiny Gang in "Finn the Human" looks an awful lot like [[Anime/TengenToppaGurrenLagann Kamina]].
** Speaking of anime, let's play a drinking game. Drink for every ''Anime/FullmetalAlchemist'' reference. So, let's see. Two blond brothers, the older one has a mechanical arm; the mechanical arm can become a sword; the family household bursts into flames; untold power coming from red stones [[spoiler: at the cost of thousands of lives]]; [[spoiler: the forceful creation of alternate universes in which one is based in a rural farmtown]]...
** The Destiny Gang's eclectic getups are supposed to be reminscent of ''Manga/FistOfTheNorthStar''.
** Trommy looks like [[WesternAnimation/AvatarTheLastAirbender Prince Zuko]].
** The domino mask-wearing Destiny Gang member looks suspiciously like [[VideoGame/TheLegendOfZeldaSkywardSword Groose]].
** [[LiteralGenie Prismo]] explicitly makes a reference to "Literature/TheMonkeysPaw" when he's explaining to Jake how his wishes work.
** And Jake initially wants to wish for a sandwich, which was also Homer's attempt at a foolproof wish in the ''TreehouseOfHorror'' parody of The Monkey's Paw.
* In "Holly Jolly Secrets", Ice King creates [[ComicStrip/CalvinAndHobbes snow goons]] to attack Finn and Jake.
* Finn playing with the mini-people in "All the Little People" is very reminiscent of ''VideoGame/TheSims'', the minis even [[SpeakingSimlish speak in gibberish]].
** Or on a creepier note, his utter ruination of their lives and the off-kilter, creepy "Playing God" vibe of the episode seem a bit reminiscent of a certain animation for [[http://www.youtube.com/watch?v=fBGGAjMg9vw Mark Twain's "The Mysterious Stranger"]].
*** Princess Bubblegum experimenting on some blob "people" by snipping off their limbs in "The Lich" could also be a reference to "Mysterious Stranger".
* Marceline riding the Rock Giant's finger to the music shop nearly resembles the opening sequence of WesternAnimation/{{Superjail}}
* In ''Adventure Time: Hey Ice King! Whyd you steal our garbage?!!'' if you try to enter the first dungeon before finding Finn's sword, Jake tells Finn that "It's dangerous to go alone." a famous line from the original ''VideoGame/TheLegendOfZelda''.
** In the third dungeon, the Ice King says [[VideoGame/CastlevaniaSymphonyOfTheNight "But enough talk! Have at you!"]] before you go to fight the boss; examining the third Garbage Princess will prompt Jake to call it [[VideoGame/CastlevaniaSymphonyOfTheNight "a miserable little pile of garbage."]] Fittingly, the boss of the dungeon is [[spoiler:Marceline.]]
** The secret final boss battle [[spoiler:with Lumpy Space Princess]] is a direct homage to [[{{VideoGame/KirbysAdventure}} Kirby's fight with Nightmare]].
** Jake residing in Finn's backpack is highly reminiscent of ''VideoGame/BanjoKazooie''.
* "Mystery Dungeon" is partly a reference to ''Film/{{Cube}}''.
** In the same episode, Tree Trunks [[Film/BadTaste cutting her way out of a monster while saying "I'm born again!"]]
** The animated book is reminiscent of MickeyMouse.
** [[MisterRogersNeighborhood "Everything is true in the garden of your mind."]]
* "Up A Tree" has the occupants of the tree doing an IAmLegion chant that sounds very familiar: [[Franchise/PiratesOfTheCaribbean In the tree, part of the tree. In the tree, part of the tree.]]
* In "All Your Fault", the bizarre creatures in the Lemongrabs' kingdom [[spoiler: which the Lemongrabs made they made from their entire food supply]] look like the creatures in [[http://en.wikipedia.org/wiki/File:The_Garden_of_Earthly_Delights_by_Bosch_High_Resolution.jpg Hieronymus Bosch's "The Garden of Earthly Delights"]].
** One of the creatures, Lemon John, has a crisis: if he attacks the Candy Kingdom the Lemon people will live but the Candy people will be destroyed; if he doesn't the Candy people will live but his "family" will die. Lemon John states this in a way that sounds like [[Theatre/LesMiserables Jean Valjean's "If I speak I am condemned/If I stay silent I am damned"]]. Lemon John takes a third option: [[spoiler: he saves everyone by reverting back a ton of lemon candy]].
** It is possible the Lemonjohn's design was inspired by the colossi from ''VideoGame/ShadowOfTheColossus''.
* In "The Great Bird Man" Xergiok is reminiscent of Theatre/{{Oedipus|TheKing}} - he's a former king who's blind, lame and a recluse after committing great wrongs and his beard is "[[EyeScream adorned with eyeballs]]", only this time they're whole.
** Xergiok's eyes may also be a reference to {{Homestuck}}. They match (Homestuck spoilers) [[spoiler:Sollux's after Eridan blinds him]], and he explains their loss as, "I miffed off a wizard and he took my eyes."
* "Simon and Marcy" has Simon singing the opening theme song of ''Series/{{Cheers}}''. "Filmed before a live studio audience. Norm!"
** It also possibly pays homage to 'TheRoad' as well as some zombie movies such as '28DaysLater'
** Probably unintentional, but the episode also seemed to have a few vague similarities to trailers for ''VideoGame/TheLastOfUs''.
* Choose Goose? More than likely a subtle shout out to the Goo-Goose that chews goo in Creator/DrSeuss' children's tale ''Literature/FoxInSocks''.
* In "Death in Bloom", Morrow get Bubblegum like the Bird to get Link to teleport in another place in ''VideoGame/TheLegendOfZeldaALinkToThePast''
* In "Puhoy", Finn comments that Jake's pillow fort is [[BiggerOnTheInside "Smaller on the outside"]], which are the words used in the ''Series/DoctorWho'' Christmas Special "The Snowmen" by current companion Clara Oswin Oswald.
** When Rosalinen realizes Finn must return home, she is accepting of his decision and only asks that he remember her - the same request Marin makes of Link when she realizes he must leave [[spoiler: by waking up, which will destroy her and the rest of]] Koholint Island in ''TheLegendOfZeldaLinksAwakening''.
** The plot of the episode appears to draw from the ''Series/StarTrekTheNextGeneration'' episode "[[Recap/StarTrekTheNextGenerationS5E25TheInnerLight The Inner Light]]," in which Picard similarly lives out a familial life in a dream; in addition, adult Finn is voiced by Creator/JonathanFrakes.
* It is possible that that the name of "BMO Lost" is a reference to Paradise Lost.
* In "A Glitch Is a Glitch", Ice King [[Literature/SnowCrash unleashes a computer virus that affects people in real life]].
* As well as classic 70s kung fu movie references, "The Chamber of Frozen Blades" was basically one big ''Manga/{{Naruto}}'' reference. Perhaps most blatantly, the [[http://adventuretime.wikia.com/wiki/File:Chamber_of_the_frozen_blades_poster.jpg promotional art]] shows Rebecca Sugar (one of the writers/storyboarders) wearing a Konoha ''hitae-ate''.
* Scorcher the [[ImplacableMan unstoppable]] [[PlayingWithFire fire-wielding]] [[ProfessionalKiller assassin]] from "Hitman" basically ''is'' Sabrac the, um, [[CaptainErsatz unstoppable fire-wielding assassin]] from ''ShakuganNoShana''.
* In "Apple Thief" the gang get caught by some gangsters who try to [[{{Snatch}} "feed them to the pig"]]. Mr. Pig mentions his former career as a criminal-eater again when he reappears in "Dream of Love".
* In "The Suitor", Pebs mentions a key to the [[Anime/YuGiOh shadow realm]].
* In "Another Five More Short Graybles", Lemongrab shouts "[[Franchise/{{Highlander}} ONLY ONE!]]" as he eats his brother.
* "James Baxter the Horse" is a homage to a {{Disney}} and {{Dreamworks}} animator of the same name. Finn looks up to the fictional James Baxter like how Creator/PendletonWard looks up to the real James Baxter - who animated and voiced his namesake.
* When Finn, Jake, and PB enter Wizard City in ''Wizards Only, Fools'', it looks like [[Film/HarryPotter Diagon Alley]].
** Also in "Wizards Only", the underwear thrown on Finn in prison might be a shout-out to the less child-friendly assault on Clarice in ''Film/TheSilenceOfTheLambs''.
*** That episode is also as close as you can get to a {{Superjail}} episode.
* In "Be More" when BMO goes to get fixed, he notes their personalities and memories are erased and he doesn't want them to disappear [[Film/BladeRunner like tears in the ''oven'']].
* Not really a shout-out, but "Music/{{Bjork}}" is used as an exclamation thrice in "Jake Suit".
* One of the stickers Cinnamon Bun uses for his note in "Earth and Water" looks like one of the smaller creatures from ''Anime/MyNeighborTotoro''.
** In the same episode, after [[spoiler:Flame Princess has deposed her father]], she's wearing an outfits and hairdo that looks a lot like [[WesternAnimation.AvatarTheLastAirbender Azula]]. From Fire Princess to Fire Princess.
* In "The Vault" The Regression sim game looks a lot like ''VideoGame/SuperHexagon''
** In the same episode, the Bath Boy Gang Leader hold an [[CaptainErsatz uncanny resemblance]] in mannerisms, body shape, and voice to King Herod from JesusChristSuperstar.
* In "Memories of Boom Boom Mountain", the Head Marauder calls Finn a "chicken" as he walks out of the village to see who is crying. Finn slowly turns around with a DeathGlare on his face and asks: "What did you call me?" This scene is VERY reminiscent of Marty [=McFly=]'s reaction to being called the same thing in the ''Film/BackToTheFuture'' trilogy. The fact that the Head Marauder is voiced by Thomas F. Wilson (aka. Biff Tannen) certainly helps.
* In "Too Old", the original Lemongrab's appearance as a bloated Caligula figure that moves around by floating is very reminiscent of [[Film/{{Dune}} Baron Harkonnen]].
* Clarence and Ghost Princess' story is basically that of [[TheIliad Achilles]] [[ClassicalMythology and Penthesilea.]]
* In "The Suitor", a helmet that looks oddly like [[Franchise/StarWars Jango Fett's]] can be seen on a bookshelf in Braco's room.
* In "Marceline's Closet", you can see the [[Film/PansLabyrinth Pale Man]]'s head and one of his hands among the hunting trophies mounted on the wall (directly above the titular closet)
* In BMO Noire, BMO and Neptr have an exchange highly reminiscent of the famous exchange between Rei Ayanami & Kaworu Nagisa in episode 24 of ''Anime/NeonGenesisEvangelion''.
* "City of Thieves":
** May be a coincidence, but ''City of Thieves'' was one of the most popular ''Literature/FightingFantasy'' gamebooks.
** The section when Finn believes himself to have been darkened by the city is a spot-on parody of ''WesternAnimation/BatmanTheAnimatedSeries''.
* In "Betty", During the fight against Bella Noche, a character named James (as in Jesse James) Longman, wearing a pink shirt, uses heavily slang-ridden speech, and shows a formula he made in his lab, which is not ideal. In other words, hes a ShoutOut to [[Series/BreakingBad Jesse Pinkman]].
* In "The Red Throne", the fight scene between Flame King and Don John the Flame Lord is a near-exact replication of the memetically infamous fight scene from ''Film/TheyLive'' (To top it off, both characters are even voiced by Keith David and "Rowdy" Roddy Piper, respectively)
* One of Johnny's records in "Bad Timing" (specifically the one LSP uses for a gag) is the Music/FrankZappa album [[http://upload.wikimedia.org/wikipedia/en/8/83/Apostrophe_%28%27%29.jpg "Apostrophe."]]
* The Grass Sword grows into a [[BodyHorror giant, monstrous, twisted arm]] in the style of [[Manga/{{AKIRA}} Tetsuo]] when Finn tries to prevent [[spoiler:his father]] from escaping.
* Princess Bubblegum wears [[Film/JurassicPark Dr. Sattler]]'s outfit in ''James II''.
* The Fleshing out of the Lich due to the Crystal Guards blood is somewhat reminiscent to Eri Masami's demise in Anime/SerialExperimentsLain.
** Also the Headless Horseman in ''Film/SleepyHollow'' (which is probably a shout-out too given how much it's influenced by HammerHorror movies).
* The origin of the Gumball Guard in "Rattleballs" is a shout out to the Manhunters from the ''Comicbook/GreenLantern'' mythos. They even have the same color scheme as the Manhunters.
* "The Tower" looks like it's made out of VideoGame/{{Minecraft}} blocks.
* In "Furniture and Meat," Wildberry Princess attempts to execute [[spoiler:Finn and Jake]] for their abuse of the power of wealth by ironically drenching them in their molten gold, likely imitating the KarmicDeath of [[spoiler:Viserys Targaryen]] in the ''Literature/ASongOfIceAndFire'' / ''Series/GameOfThrones'' franchise
* The "freaky clothes" Lumpy Space Prince dons in "The Prince Who Wanted Everything" are portions of the outfit of Char Aznable of ''Anime/MobileSuitGundam''. They match well with his many {{Animesque}} facial expressions.
* The 5th season (2012) episode "Jake the Dog" contains an author Shout out to the Head of Story, Kent Osborne. He was in a 2010 film called ''Uncle Kent'', and the dialogue that Prismo and Jake share in the jacuzzi is verbatim that which Kent and Joe have in the swimming pool (the lines about co-ordinating breakfast and views on relationships)
* During "We Fixed A Truck", BMO briefly shows the famous "Flying Toasters" screensaver from ''After Dark'' on its screen.
* The season 6 episode,''"Something Big"'', had a shout out to ''Manga/AttackOnTitan'', of all things, with giant humanoids, a flying army attacking said giants (the majority being killed in the process), cannons firing from the Candy Kingdom's walls, with the giants regenerating their limbs and heads when destroyed. There's even a colossal giant leading them, with a weak spot near its head, to top it all off.
* "Breezy": Another ''Sailor Moon''-esque transformation sequence.
* "Food Chain": Caterpillar-Finn and his bride Erin fall through the air holding hands like [[SpiritedAway Chihiro and Haku]] (or alternatively, like [[EurekaSeven Renton and Eureka]]).
** And it's not too hard to see the influence of [[NeonGenesisEvangelion Komm Ssser Tod]] in the Food Chain song.
* "Little Brother": Kent's archetypical HerosJourney with HighFantasy elements through a tight, dark, brown, tubular space is reminiscent to ''WesternAnimation/SouthPark''[='s=] Lemmiwinks adventures.
** The Rat King bears more than a passing resemblance to [[{{Godmars}} Emperor Zuul]] of all things. (They even fight in an area that resembles the background of their final fight in SuperRobotWarsZ.)
* "Something Big": Darren summons help during the assault on the Candy Kingdom with the incantation "I call forth the Legion of Cadmus, The Dragon's Teeth." This is a shout out to Greek Mythology, where Prince Cadmus threw dragons' teeth on the ground and had skeletal soldiers appear to fight.
* "Princess Day" is a big honking reference to ''ThelmaAndLouise'', complete with the iconic ending.
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