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->''"Hello everyone! I'm Amy's imaginary friend. But I came anyway."''
-->-- '''[[Series/DoctorWho The Doctor]]'''

Unlike an ImaginaryFriend, a Not So Imaginary Friend is '''real''', but due to a pile-up of coincidences, [[ByTheEyesOfTheBlind mystical restrictions]], an explicit or implied WeirdnessCensor, or deliberate evasiveness on this character's part, he remains unseen by others.

Generally, by the end of the episode, this character's existence has been proven and the person seeing it gets vindicated, but not always.

This plot is also referred to as "The Singing Frog", after ''WesternAnimation/OneFroggyEvening'', the famous WesternAnimation/LooneyTunes cartoon in which a man cannot convince anyone that a frog he has found can sing and dance, and ends up broke and homeless because of it.

Compare with ItWasHereISwear. See also CassandraTruth, IgnoredExpert. If the character(s) seeing this character are not believed because they've lied in the past, it's CryingWolf. Sometimes this character will be MistakenForAnImposter. Should not be confused with a {{Tulpa}}, where an imaginary friend is transformed into a real being by people, usually, but not always its creator, [[ClapYourHandsIfYouBelieve literally believing in it enough]]

TheOtherWiki [[WeAreNotAloneIndex has an entry]] on the [[http://en.wikipedia.org/wiki/Martha_Mitchell_effect Martha Mitchell effect]], cases where an individual is misdiagnosed over hallucinations that were, in fact, real.

----
!!Examples

[[foldercontrol]]

[[folder:Advertising]]
* If [[http://www.youtube.com/watch?v=eGhtwCwkYaw Mr. Giggles]] ever asks you for some cheese, say yes.
[[/folder]]

[[folder:Anime & Manga]]
* Hanyuu from ''HigurashiNoNakuKoroNi'' falls under this trope, because what they thought was a scary, evil god is actually a sweet, innocent invisible god who no one besides Rika (and people high on the levels of Hinamizawa Syndrome) can see or hear, though in Matsuribayashi-hen, she becomes visible. Rika's mother actually resented Hanyuu because Hanyuu taught her how to cook and thought Rika was making things up. In Rei, it seems she is invisible once again.
* Deus Ex Machina from ''MiraiNikki'' is introduced as such, but we very quickly learn that this is not the case, he is actually God, and he's been preparing a rather sick [[ThereCanBeOnlyOne game]].
-->'''Deus''': "I'm a god. Why can't I live in your imagination?"
** Given how [[spoiler:gods in this series are shown capable of manipulating or 'editing' the memories of themselves or others]], there might be a hint of FridgeHorror regarding exactly ''how'' Deus took up residence in Yuki's mind.
* The Shinigami in ''Manga/DeathNote'' are a rare example of an actively hidden Non-Imaginary Friend, though most of the cast knows about them by the end.
* Inverted in ''Manga/KingOfThorn''. [[spoiler: One of the effects of the Medusa disease is materialization of imaginary friends. Cue the world getting overrun by monsters born of people's imagination.]]
* An inversion happens in the ''Anime/SailorMoon R'' movie. Mamoru was convinced the alien he saw upon waking up in the hospital, Fiore was only an imaginary friend.
* Kyubey of ''Anime/PuellaMagiMadokaMagica'' is such that only magical girls (and those who have the potential to be such) can see him.
** FridgeHorror: Kyubey has strong telepathic powers that enable him to talk to people from far away. He holds conversations with people who are not themselves able to talk telepathically which means he is reading their minds. Kyubey being [[InvisibleToNormals invisible to normalness]] probably involves manipulating people's minds into not noticing him.
** In the ending, [[spoiler:Madoka becomes this to her brother (literally) and Homura. No one else has any reason to believe she exists]].
* Maromi from ''Anime/ParanoiaAgent''. [[MindScrew Or is it?]]
** A bigger revelation is that this is also true of [[spoiler: Shonen Bat.]]
* England and his magical friends from ''AxisPowersHetalia'' - nobody else, save for Norway perhaps, can see them, so they think he's delusional when they catch him talking to or about them, but the fact that he saw a tengu and a youkai when he was at Japan's house as well proves that Flying Mint Bunny and the others have to be real as well.
* [[OurFairiesAreDifferent Puck the elf]] fills this role in ''{{Berserk}}''. Since normal people who have never experienced the supernatural or who are devout followers of the Holy See religion [[InvisibleToNormals can't see supernatural creatures,]] anyone who encounters Guts often wonder who the hell he is talking to over his shoulder.
[[/folder]]

[[folder:Comics]]
* Prior to the ''{{Onslaught}}'' saga, young [[ComicBook/FantasticFour Franklin Richards]] was visited by a so-called "imaginary friend" by the name of Charlie. When "Charlie" telekinetically causes Franklin to drop a glass of milk, he was chided by his mother for it. When Franklin tried to blame it on Charlie, Invisible Woman replies "Your ''invisible'' friend?" Of course, "Charlie" wound up being a projection of Onslaught trying to manipulate the most potentially powerful human on Earth.
* ''ComicBook/BlueMonday'' features Shamus, a six foot, smelly, perverted weasel. Bleu's best friend Clover calls her crazy due to Bleu blaming many things on "Shamus". Fast forward a series and it turns out Clover could see and even talk to Shamus all along, she was just giving Bleu shit.
* In one comic DonaldDuck was sent to the asylum because he was claiming that he's friends with Easter Bunny, whom only he could see. In the asylum other patients started to see Rabbit as well and he was apparently curing them from their own issues. It was hinted that Bunny could be RealAfterAll (we never seen more than his shadow).
** Another comic had an imaginary ''fiend'' which was the incarnation of a common cold. That could counter cold remedies by taking remedies of his own.
* The NewsboysLegion member "Gabby" was friends with a huge furniture-eating pink monster named Angry Charlie, but the other kids didn't believe about Charlie (who helped Guardian and the boys, but always out of sight). Charlie revealed himself when he had to help against Boss Moxie and the forces of [[NewGods Apokolips]].
* Hobbes, of ''ComicStrip/CalvinAndHobbes'', is often interpreted as one of these. However, Bill Watterson always made a point of insisting that neither Calvin (who sees him as a living, breathing creature) nor the other human characters (who see him as a stuffed toy) [[MaybeMagicMaybeMundane necessarily have the "true" perspective]].
** One plot involved Calvin and Hobbes time-traveling shortly into the future, where Calvin ''should'' have finished a homework assignment, so he could travel back with it without having done it himself. While Calvin and his time-duplicate argue over who should do the assignment, Hobbes and ''his'' time duplicate write it together, and use it to make fun of Calvin and his plan. Calvin, without reading it, turns in the assignment, which was noted as being different and better than Calvin's usual style, and capable of telling jokes at the expense of Calvin, which Calvin is ''not''.
** Calvin manages to climb trees, which he wouldn't be able to manage alone, with Hobbes giving him a boost to the first branch. Another time Hobbes tied Calvin to a chair. Other characters express amazement that Calvin can do all these things by (or to) himself, even when it's very clear he needed help at certain points in his adventures.
--->'''Susie:''' ''(watching Calvin and Hobbes wrestle)'' I don't know what's weirder; that you're fighting your stuffed animal or that you seem to be losing.
--->'''Calvin:''' I'm not losing! He cheats!
* Mr. O'Malley, the diminutive, cigar-chomping [[FairyCompanion fairy godfather]] in Crockett Johnson's ''{{Barnaby}}'', was, in spite of the best efforts of Barnaby and his friend Jane, only ever known to exist to the two of them. Numerous potential introductions are ruined by Barnaby's parents looking away at just the wrong moment or leaving the room as he entered, and the two steadfastly refused to believe O'Malley existed in spite of rapidly mounting evidence to the contrary. The strip ended with Barnaby reaching his sixth birthday, forcing Mr. O'Malley to disappear from his life.
* In ''{{Curtis}}'', there's Gunk's pet "Flyspeck Island chameleon", who's constantly breaking things and creating other types of havoc and getting Curtis in trouble with his parents, who assume he's making the creature up. It doesn't help that the chameleon has the power of invisibility.
* ''ComicStrip/TheFamilyCircus'' has occasional appearances by invisible, troublemaking ghosts or gremlins with names like "Not Me" and "Ida Know". While they're obviously meant to be a VisualPun on the time-honored tendency of children to deny responsibility when confronted with their misdeeds, it seems as if the gremlins actually exist in the universe of the strip, even if the parents deny their existence.
* One ''FarSide'' cartoon involves a man being forcibly lifted by his shirt collar off the ground; the person lifting him is invisible both to him and to the reader. An angry-looking little kid explains, "Big Bob is tired of you saying he doesn't exist."
* In Richard Thompson's ''CulDeSac'' newspaper strip, Petey has a friend/nemesis Ernesto, an overbearing, insufferably smug fellow - Petey isn't sure if he really exists or not.
* The Red Dragon in ''{{Bone}}''.
* Then-[[TheFlash Flash]] Wally West eventually learns his imaginary alien friend, Krakkl of Kwyzz, is not only real, but a speedster like himself
* ''ComicBook/StanleyAndHisMonster'': Stanley's parents assume he's just playing make-believe when he tells them he's met an enormous monster and asks if he can keep it. They never learned the truth during the comic's original run, but the 1990s revival mini-series ends with them discovering that Spot is real.
* ''TheSavageDragon'' has an AscendedFangirl[=/=]StalkerWithACrush named She-Dragon, who had seemingly imaginary friends as a result of her initial creation as a parody of John Byrne's fourth-wall-breaking SheHulk. Eventually, however, the voices she was hearing turned out to belong to a group of demigods trapped in another dimension who had a psychic link with her.
* One ''OffTheMark'' strip showed a group of these characters gathered: [[TheFlintstones The Great Gazoo]], [[RoseIsRose Pasquale's guardian angel]], [[ComicStrip/CalvinAndHobbes Hobbes]], [[WesternAnimation/{{Arthur}} DW's magical friend]], [[ComicStrip/TheFamilyCircus Ida Know, and Not Me]], with Hobbes saying "Let's not forget... [[SesameStreet Snuffleupagus]] started out just like us and now ''everybody'' can see him!". The caption is "Invisible Friend Support Group".
* ''ComicStrip/{{Garfield}}'' has at least two known cases from his strips:
** [[http://images.ucomics.com/comics/ga/2003/ga030716.gif Clive]]. This is also an example of a BrickJoke, as it came seven years after the week-long arc that introduced Clive.
** [[http://www.garfield.com/comics/vault.html?yr=1998&addr=981007 Garfield chasing an invisible mouse]].
[[/folder]]

[[folder:Fan Works]]
* In ''FanFic/KiraIsJustice'', one element of Not So Imaginary Friend is defined and enforced by the author. To prevent Justin from just talking to Landras in his room, where his family might notice, the Telepathy Necklace is introduced. It hadn't been abused yet.
* Aside from Hobbes, Socrates of ''Fanfic/CalvinAndHobbesTheSeries'' is about the same as the former.
** Interestingly enough, this makes for quite the FridgeLogic situation. As the plot calls for the two tigers to have adventures with the other three protagonists, they end up being seen by quite a few people as living. While aliens and robots can be {{Hand Wave}}d, other humans like the Brainstorm family (who think he's a robot) don't have that excuse.
[[/folder]]

[[folder:Films -- Animation]]
* In ''Film/IceAge: Continental Drift'', Granny constantly calls out to Precious, her pet which is presumed to be either imaginary or dead. Then Precious turns out to be [[spoiler:a sperm whale]].
[[/folder]]

[[folder:Films -- Live-Action]]
* The film ''{{Harvey}}'', based on a play.
* Frank from ''DonnieDarko''. He's ''literally'' a six-foot rabbit that no-one besides the title character can see. For good reason, since he's [[spoiler:a schizophrenic vision of said character. Or a time-traveling murder victim of that same character. Or a metaphor for the DeusExMachina that hit the ResetButton. Or... [[MindScrew all of the above]].]]
* In ''HeartAndSouls'', Thomas is a young boy who has several imaginary friends who turn out to be the ghosts of people who were killed in a bus accident. As a grown man, Thomas thinks he's going crazy until he talks to an institutionalized woman who confirms she can see them. She even makes up another ghost to make sure they aren't just humoring each other.
* In ''Cooperstown'', a retired baseball player is visited by the ghost of his deceased friend. His grandson and his grandson's girlfriend think he's crazy until they confirm (by asking questions about the ghost's batting average) that the ghost really is there.
* ''DropDeadFred'' centers on this trope.
* The title character in ''RainMan.'' As a young child, the protagonist had an imaginary friend known as "Rain Man" who told him stories. Then he grew up. [[spoiler:The "imaginary friend" turned out to be his autistic much-older brother.]]
* ''PetesDragon'' is heavy on this trope.
* In ''HideAndSeek,'' David doesn't believe his daughter when she said her imaginary friend Charlie killed his wife. [[spoiler: But he soon discovers ''he'' is Charlie, who he created to cope with his anger when he saw his wife sleeping with another man, and was responsible for killing her.]]
* King Brian in ''Disney/DarbyOGillAndTheLittlePeople''.
* ''Francis the Talking Mule'': Everyone could see him, but for the most part, Peter was the only one he would talk to, although it was often subverted when Francis ''would'' talk someone else when Peter was really in a jam.
* The titular canine of ''To Dance with the White Dog'', who is seen only by the film's elderly protagonist[[spoiler: at first]]. She turns out to be [[spoiler: the spirit of his dead wife]].
[[/folder]]

[[folder:Literature]]
* Karlsson in Creator/AstridLindgren's ''Literature/KarlssonOnTheRoof'' behaves as one of these for a long time, although eventually he reveals himself to the rest of the family.
* Commonly used in the ''{{Goosebumps}}'' books.
* Poor Becky from the ''{{Shopaholic}}'' series spends the first half of the second book desperately trying to convince her family and friend that she is, indeed, dating a famous multi-millionaire. HilarityEnsues.
* In Robert Asprin's ''MythAdventures'' series, one volume had a running joke about there being no such thing as Gremlins. Naturally, one did show up at the end of the story.
* This is the central plot point of Creator/CornellWoolrich's ''Phantom Lady''.
* ''Discworld/SmallGods'' had St. Ungulant, a hermit who lived out in the desert with the eponymous small gods. His lifestyle involved daily hallucinations, but fortunately his invisible friend Angus was there to keep him from going crazy. Angus later proved himself to be real by braining a hungry lion.
* The short story "[[http://www.youtube.com/watch?v=KpdLWr_l7OI Thus I Refute Beelzy]]" by John Collier.
* OlderThanRadio: Creator/OscarWilde's "The Canterville Ghost" (1887). While the rest of the newly-arrived Otis family dismiss the ghost, Virginia befriends him, and ultimately aids in his redemption.
* ''Chocky'', in the Creator/JohnWyndham novel of the same name, was thought to be the imaginary friend of a young boy. It turned out [[spoiler: it was really an alien that was scouting the Earth for its species, looking for a child it could teach to advance human knowledge with ETGaveUsWiFi.]]
* In ''TheGraveyardBook'', Scarlett's parents think that Bod, the protagonist, is her imaginary friend. [[spoiler: At the end, she barely remembers him.]]
* In the ''44 Scotland Street'' series by Alexander [=McCall=] Smith, ChildProdigy Bertie's [[TheShrink therapist]] believes Bertie's best friend Tofu is imaginary. He's so convinced of this that he makes absolutely no effort to ascertain this beyond asking "Does your mother see Tofu?" (She doesn't, because Bertie knows she never notices anything) and "Is Tofu here now?" (He isn't. Obviously). He then proceeds to make an entire diagnosis based on this assumption.
* Anna of ''The Woman in the Wall" got stuck in a school employee's handbag because of this trope.
* In the Arthurian novel ''Guinevere,'' a retelling of the legend covering the youth of the future Queen of Camelot, a friend of Guinevere's is considered half-mad because he is acquainted with a choir of very good but invisible singers that only he can hear. Guinevere discovers he's telling the truth because she's able to not only hear them, but ''see'' them; however, they agree to keep this a secret between themselves.
* The focus of the poem "Antagonish" by Hughes Mearns:
-->''Yesterday upon the stair''
-->''I met a man who wasn't there.''
-->''He wasn't there again today''
-->''Oh how I wish he'd go away!''
* In "Mr. Lupescu", a short story by Anthony Boucher, this is done as part of a scheme to MurderTheHypotenuse. Alan wants Marjorie, but she is already married to the wealthy Robert. So Alan pretends to be her son Bobby's fairy godfather "Mr. Lupescu" using an elaborate costume and gains his trust with stories of travels in the Milky Way. He also instills a fear of an imaginary monster called Gorgo that will punish Bobby if he misbehaves. All so that the boy will allow him into the house to meet Robert, whom he promptly kills. "Mr. Lupescu" warns Bobby not to tell people what happened or else Gorgo will take him. Of course, no one believes stories of a fairy godfather killing Robert, leaving the police baffled. Alan goes home and destroys his costume, satisfied in the knowledge that Marjorie, now a rich widow, is available. [[spoiler:Unfortunately for Alan, Gorgo turns out to be a Not So Imaginary Monster.]]
* In "Literature/ThePrincessAndTheGoblin" by GeorgeMacdonald, Princess Irene's great-grandmother (also named Princess Irene) acts as one of these. No-one is quite sure whether or not to believe Princess Irene, even after her great-grandmother engineers a massive victory against the Goblins.
* In the ''Literature/{{Temps}}'' short story "Someone To Watch Over Me", Damon started out as Darren's imaginary friend. It wasn't until he was older that Damon started fighting back against the kids who bullied him and his mum's boyfriends. The [[GovernmentAgencyOfFiction DPR]] classifies Damon as "a semi-autonomous [[PsychicPowers psychokinetic energy field]]", but GentlemanWizard and senior official Loric prefers to call him a {{familiar}}.
* In AndreNorton's ''Literature/DreadCompanion'', Kilda thinks that "She" is an imaginary friend. At one point, Bartare even says that she is, and she uses her to frighten Oomart. Once they are through the CoolGate, she admits the truth.
* In Zenna Henderson's "Loo Ree", six-year-old Marsha enters first grade with what certainly appears to be an imaginary friend. She's also a tough little cuss who will punch you in the nose or knock you flat on your heinie if you say Loo Ree isn't real. So the class has to play along, until they're all behaving as if Loo Ree was real, just invisible... and this is entirely as it should be.
[[/folder]]

[[folder:Live-Action TV]]
* ''SesameStreet'': The long-running gag involving Big Bird and his friend, Mr. Snuffalupagus (a large, furry, mammoth-type creature). From his first appearance in 1971 through the fall of 1985, Big Bird would always try to expose Snuffy to his adult friends, but for some reason or another Snuffy would leave and the adults would tease him about his "imaginary friend." Big Bird would then [[BreakingTheFourthWall appeal to the audience]], "Well, you saw him, didn't you?"
** The recurring gag was dropped in 1985 and the adults made to see him, some say in the aftermath of the growing awaress of child sexual abuse cases and a desire to catch pedophiles who were thriving because children were keeping silent. It was thought that, with possible victims watching ''Sesame Street'' and seeing that Big Bird wasn't being believed about Snuffy, the child might decide to keep quiet. (The adults were very apologetic when they realized Snuffy was real.)
* ''TheAndyGriffithShow'': "Mr. [=McBeevee=]," the 1962 episode where Opie meets a telephone lineman. Because of the way 8-year-old Opie describes [=McBeevee=]:
** He "blows smoke from his ears" ([=McBeevee=], a smoker, is able to make smoke come from his ears when exhaling)
** He "lives in the trees" ([=McBeevee=]'s work is often high atop telephone poles.
** He "has 12 extra hands" (his tool belt and wide variety of tools, which he needs at his side to make various repairs).
** ... it sounds as though [=McBeevee=] is an ImaginaryFriend, and Andy and Barney are skeptical about his existence. Things turn serious when Opie shows his father a quarter (that [=McBeevee=] had given him as a present), leading Andy to conclude that his son may have stolen it,[[note]]Because Imaginary Friends are the first step on the slippery slope to juvenile delinquency, Andy never considers Opie could have found or worked for the quarter and then just ''said'' it was a present from [=McBeevee=]. [[/note]] and things become worse for Opie when they go to [=McBeevee=]'s worksite, only to find nobody there. (Shortly before Andy and Opie arrived, [=McBeevee=] was called to assist another worker.) Andy decides he has to punish his son for lying, but can't bring himself to do it when Opie insists that [=McBeevee=] is real. Just as Andy goes to a clearing to cool off, he muses aloud, "Mr. [=McBeevee=]" and it isn't long before [=McBeevee=] responds.
* ''Series/{{Topper}}'': Ghosts George, Marion and Neil are only visable to Cosmo Topper, who often double talks his way out of situations of people overhearing him talking to them.
* ''Series/{{Frasier}}'': Frasier not being able to prove he's dating a marine biologist/supermodel.
* ''Series/{{Wings}}'': Joe not being able to prove one of his high school friends is stalking him.
* ''Series/FawltyTowers'': Basil not being able to prove a guest has snuck a lady friend into his room.
* ''Series/BattlestarGalacticaReimagined'': Baltar can see (and feel) Six, which can sometimes lead to some rather frightening scenes. And [[CoitusUninterruptus sometimes hilarious ones]]. And for bonus points, the "real" Six has a Baltar running around that only she can see. And [[spoiler:Baltar's Six and Six's Baltar can see each other.]]
* "Catalina's best friend Suzee isn't there" from Creator/{{Nickelodeon}}'s ''SpaceCases''. Saturnian Catalina has an invisible best friend in another dimension that only she can talk to, named Suzee; naturally no-one believes her. This is subverted when an explosion causes the two to trade dimensions and ''Suzee'' joins the crew while Catalina is only seen once more through a trans-dimensional viewscreen.
* ''Series/TheTwilightZone'', "Nightmare at 20,000 Feet". Creator/WilliamShatner's character can't convince anyone, "There's something on the wing!"
** Spoofed [[http://au.youtube.com/watch?v=8a2yDBxf-Jk here]] at 1:43.
** Also spoofed on ''WesternAnimation/TheSimpsons'' when Bart notices a Gremlin tearing apart the school bus. His reward for saving everyone's life? [[GoMadFromTheRevelation An eternity in a mental ward.]]
** Similarly spoofed on ''MuppetsTonight'', [[http://www.youtube.com/watch?v=H6re4XsQZNQ#t=6m28s where Miss Piggy finds herself on a plane with Shatner.]]
-->'''Shatner:''' Oh, ''that'' guy, I've been complaining about him for ''years'', nobody does anything about it. [[CrowningMomentOfFunny Here, have a copy of my autobiography]].
* In ''Series/TheFactsOfLife'', everyone thought Natalie was making up her biker boyfriend, "Snake". The show went so far as to end an episode with the sound of a motorcycle revving up, and Natalie exclaiming "SNAKE!" (with a quick fourth-wall break to inform the audience they'd have to wait a bit to actually see him). We do finally see him a few episodes later, mostly to set up the VerySpecialEpisode where Natalie is the first of the girls to lose her virginity.
** We can actually thank Lisa Whelchel for Snake's introduction. The storyline about Natalie losing her virginity was actually originally written to center around Blair. However, Whelchel refused to appear in the episode altogether because at the time, she was (and still is) a born-again Christian and premarital sex conflicted with her morals.
* In an episode of ''{{Monk}}'', no-one believes that Randy's girlfriend Crystal is real. Randy appears to have [[LineOfSightName taken her name ]]from a box marked "crystal glassware," and the picture he has of her is a wallet insert (He explains that she is a photography model). He spends the entire episode trying to convince everyone she is real, even getting her on the phone at one point, to no avail. She is revealed to be real at the end of the episode, driving away in a taxi so no-one can see her.
* In ''Series/MontyPythonsFlyingCircus'', the notorious [[LondonGangster East End gangster]] Dinsdale Piranha [[note]]a ShoutOut to the RealLife Kray twins, one of which was mentally unstable.[[/note]] thinks he is being watched by an enormous hedgehog named Spiny Norman. He's right.
* The Janitor in ''{{Scrubs}}'' was initially designed as such a character, with the show's creator even intending to reveal him as a figment of J.D.'s imagination if the show didn't last out its first season. In the second season it ended when Neil Flynn asked to be able to work with the other actors. On a DVD commentary he describes his character in the first season as "a Snuffleupagus".
* In ''NorthernExposure'', Joel initially struggled to convince people that he had been abducted by the mountain man Adam, who everyone else regarded as an urban legend. Adam would eventually interact with other townsfolk, becoming a recurring character.
* In the long-running Canadian children's show ''The Polka Dot Door'', there was a character called the "Polkaroo" who was portrayed by one of the show's two adult hosts. In each episode, the host in question would find some pretext for leaving the set, the "Polkaroo" would come on and make his appearance, leave, and said host would come back: "You mean I missed him ''again''?"
* ''GilligansIsland'': In "Gilligan vs. Gilligan", a Russian spy arrives on the island and turns out to be Gilligan's [[IdenticalStranger exact double]]. He starts creating trouble on the island for which Gilligan is naturally blamed, but although Gilligan learns of his presence early on, he can't convince the others of the doppelganger.
* In ''Series/TheFugitive'', Lieutenant Gerard regarded the One-Armed Man as a figment of Richard Kimble's imagination, conjured up to relieve his guilt over murdering his wife. For much of the first season (until the end of the episode "Search in a Windy City"), even Kimble ''himself'' isn't entirely sure that the One-Armed Man really exists.
* In ''Series/UnhappilyEverAfter'' there is Mr. Floppy the stuffed rabbit, who only Jack the father can communicate with, largely because he is partially insane.
* One episode of ''ICarly'' inverts this, when Sam mentions she has a twin sister coming to visit. Freddie, of course, doesn't believe her, mostly because Sam had pranked him so many times, even when Carly and her brother vouched for Sam's story. But Freddie doggedly refuses to believe it, which is a shame as Sam's sister likes him too.
* In the short-lived '80s sitcom ''Series/JenniferSleptHere'', the title character (an old movie actress who had been run over by an [[BadHumorTruck ice cream truck]]) was a ghost who haunted her former house, but was only visible to one member of the family that now occupied the place: a teenage boy named Joey. Much of the show's humor derived from Joey's unsuccessful attempts to convince the rest of the family of Jennifer's existence.
* ''TheBeverlyHillbillies'': Granny runs across a kangaroo which has escaped from the neighbor's place. Everyone thinks she's drunk when she talks about the "giant jackrabbit."
* In the first season of ''HomeAndAway'', 8-year-old Sally had an imaginary friend called Milco. 20 years later, she meets her long-lost twin brother, Miles Copeland.
* The 1960s TV series ''TheGhostAndMrsMuir'' was a sitcom, very loosely based on a 1940s dramatic film. In the sitcom, a young widow and her two children (a boy and a girl) live with their housekeeper in a seaside cottage haunted by the ghost of its earlier inhabitant, a sea captain. The captain chooses to be visible to the widow and her young son, but not to the widow's daughter or the housekeeper, both of whom assume that the ghost is merely the boy's imaginary friend.
* ''Series/DoctorWho'': After the Doctor meets and befriends the young Amelia Pond, everyone else thinks that her stories of him are just them telling them about her imaginary friend. Her boyfriend is astonished when the Doctor eventually appears, having accidentally skipped forward twelve years due to his damaged TARDIS, unable to believe that "the Raggedy Doctor" is real.
** This gets repeated in the final episode of season 5, thanks to some [[TimeyWimeyBall odd circumstances]], leading to [[spoiler: him becoming real again after having been erased from reality]], and the page quote.
** Lampshaded with the BBC America intro, which reminds viewers ''every week'' that when Amy "was a little girl, [she] had an imaginary friend, and when [she] grew up, he came back..."
** The Tenth Doctor apparently becomes this to young Reinette in "The Girl in the Fireplace" after popping out of her fireplace, saving her from a clockwork robot, and disappearing again when she was a little girl.
--->'''Rose:''' Oh, here's trouble. What you been up to?\\
'''The Doctor:''' Oh, this and that. Became the imaginary friend of a future French aristocrat, picked a fight with a clockwork man...
* ''Series/{{Farscape}}'' has Scorpius's neural clone stuck inside John's head. John, being a GenreSavvy guy, named him [[http://www.youtube.com/watch?v=fQTbSCieNAY Harvey]].
* ''Series/{{Seinfeld}}'': Kramer has many friends who never appear on-screen (Bob Sacamano and Lomez to name a few). One episode gave us this delightful exchange:
--->'''Jerry:''' "You sure have a lot of friends; how come I never meet any of these people?"
--->'''Kramer:''' "They wonder why they never meet you."
* Al Calavicci in ''QuantumLeap''. He's a hologram adviser that generally only Sam Beckett can see and hear (although Al is also visible to animals, small children, the mentally handicapped and the dying). Ninety percent of the time, though, anyone seeing and hearing Sam talking to Al assumes that he's talking to himself, because as far as they can tell, no-one is there.
* In the ''Series/{{Charmed}}'' episode "Imaginary Fiends", a demon appears to Wyatt and acts like his friend, all the while trying to corrupt Wyatt into serving the cause of evil. Because only Wyatt can see the demon, the adult characters think that Wyatt merely has an "imaginary friend." The demon, who has done this with other [[WitchSpecies preschool-aged witches]] in the past, is counting on the fact that adults tend not to suspect that there's anything more unusual going on than just a kid playing with an imaginary friend.
* A similar plot occurred in an episode of ''{{Medium}}'' when one of Alison's daughters babysat for a boy that everyone thought was troubled. He would act out, then claim that it was because his imaginary friend told him to. When it turns out the girl can see the "friend" as well, he turns out to be the ghost of a teenager whose girlfriend had left him due to advice from the child's mother. Being a control-freak, after his death he decided to get the boy to act out and drive a wedge between him and his mother as a form of DisproportionateRetribution.
* ''Series/StarTrekTheNextGeneration'': An alien takes the form of a little girl's imaginary friend.
* ''LostInSpace'': The first season episode, "My Friend, Mr. Nobody", has Penny befriending a disembodied voice, that everyone assumes is just her new imaginary friend.
* A variation on ''Series/TheInvisibleMan'': the little girl already has an imaginary friend, and Darien uses his power of invisibility to impersonate "Ralph" and get a witness statement from her.
* On ''{{Lost}}'', Ben has an invisible friend named Jacob who can only be perceived by being completely delusional, being innately connected to the island, or by [[spoiler: [[BerserkButton turning on a flashlight]] in [[{{Poltergeist}} his]] presence]]. Jacob is [[spoiler: later proven to be much, much more than even a typical not-so-imaginary friend]].
* The MonsterOfTheWeek in the ''Series/{{Supernatural}}'' episode "Playthings" is a spirit posing as the imaginary friend of her grandniece.
* One episode of ''Series/SirArthurConanDoylesTheLostWorld'' sees Marguerite stepping into a booby trap and falling into a pit with spikes. She gets hurt and while Challenger gets help she hallucinates about her best friend Adrienne who keeps her awake so Marguerite doesn't fall asleep with a concussion. Later it turns out that she's not so hallucinated at all - which freaks Marguerite out.
* In ''TheBigBangTheory'', Howard tries to convince Leonard's mother that there is nothing going between him and Raj. He even tells her he has a girlfriend, but Bernadette is inconveniently out of town, so she doesn't believe him.
[[/folder]]

[[folder:Music]]
* "Bigfoot!" by the Weakerthans is about a man who is exposed to ridicule after seeing Bigfoot.
[[/folder]]

[[folder:Puppet Shows]]
* For many years (until 1985), Mr. Snuffleupagus on ''SesameStreet'' was such a character, seen only by Big Bird.
** WordOfGod: In an interview on a documentary called ''Sesame Street Unpaved'', hosted by Sonia Manzano (Maria), Snuffy's performer, Martin P. Robinson, revealed that Snuffy was finally introduced to the main human cast because of a string of high profile and sometimes graphic stories of pedophilia and sexual abuse of children on such news programs as ''60 Minutes'' and ''20/20''. The writers felt that by having the adults refuse to believe Big Bird despite the fact that he was telling the truth, [[YouWouldntBelieveMeIfIToldYou they were scaring children into thinking that their parents would not believe them if they had been sexually abused and that they'd just be better off remaining silent.]] Loretta Long corroborated this by uttering the words "Bronx daycare" during Robinson's explanation, a reference to reports of sexual abuse at the PRACA Day Care Center in New York City's Bronx borough, as covered by area TV stations WCBS and WNBC.
** Around the mid 1970s, children began to see Snuffy. Later on, Muppet characters saw him; Elmo was crucial to helping Big Bird expose the truth.
** Many children hated how Big Bird was being driven crazy, accused of just imagining him.
*** In fact, future cast member Alison Bartlett O'Reilly would frequently yell at her TV set whenever she saw the scenes.
*** Ironically, all the Praca employees later [[http://articles.latimes.com/1997-01-05/news/mn-15543_1_day-care-center had their convictions overturned]]. It was [[http://en.wikipedia.org/wiki/Day-care_sex-abuse_hysteria one of many such false cases]] from that period. However, if Snuffy's story encouraged even one genuine victim to speak up...
* ''FraggleRock'' frequently has Doc's dog Sprocket trying (and failing) to bring the Fraggles' existence to his master's attention.
** In one episode, Red discovers the last of the Lily Creatures, but can't get others to believe her. The one Fraggle who does wants to capture and exploit it, so Red "admits" to making the whole thing up to protect it.
[[/folder]]

[[folder:Theater]]
* ''{{Harvey}}'' is one of the best known examples of this trope, featuring the charming but batty Elwood P. Dowd, about to be committed for his belief in his best friend Harvey, an invisible six-foot-tall white rabbit. (Changed to seven feet for the film, because of Jimmy Stewart's own height.)
** Six feet, three and a quarter inches, now let's stick to the facts.
[[/folder]]

[[folder:Video Games]]
* The Zoni from ''[[RatchetAndClank Ratchet and Clank Future: Tools of Destruction]]'' are a group of mysterious little flying creatures that only Clank can see. Naturally Ratchet doubts their existence for most of the game...[[spoiler:until they suddenly become visible to all and take Clank with them through a mysterious rift at the very end.]]
* In ''VideoGame/WingCommander II'', every now and then you're assigned a solo mission. Invariably, you run up against the Kilrathi's stealth fighters on these missions, and when you return to base you discover that your flight recorder has malfunctioned. Add in the fact that your character claimed to see stealth fighters ten years prior when your carrier from the first game was destroyed -- a claim that was never verified and is still in fact ridiculed -- and it's not terribly hard to see why nobody believes you.
* One sidequest in ''NeverwinterNights2: Mask of the Betrayer'' requires you to convince a young magically-talented girl to leave home and train to use her gift. She insists on saying goodbye to what is strongly implied to be an imaginary friend before leaving if you succeed. [[spoiler:Then she opens the door to her bedroom to reveal a [[OurGhostsAreDifferent telthor]] ''{{bear|sAreBadNews}}''.]]
* Spoofed in the game-within-a-game ''Wing-O'' in ''System Shock II''. In one solo mission, you meet a new class of enemy fighter, but no-one believes you because you left the lens cap on your flight recorder.
** That also(?) happened with the Tri-Lackey fighters in the game-in-a-game in ''System Shock''.
* In ''VideoGame/SuperMarioRPG'', Gaz absolutely cannot convince his mother that his Geno doll came to life and walked out the door. She thinks he's lying to avoid punishment for something, though she doesn't know what. Then in walk the heroes with Geno in tow...
** [[MistakenForAnImposter And then she assumes its a person in a costume]]. Cue FaceFault from the heroes.
* In ''VideoGame/{{Psychonauts}},'' the childlike, possibly-insane ReluctantMadScientist [[TheIgor Sheegor]] claims that if Raz helps her rescue her beloved pet turtle, Mr. Pokeylope, he'll be able to come up with a plan to defeat MadScientist [[DepravedDentist Dr. Loboto]]. And indeed, once you rescue him, Mr. Pokeylope [[TalkingAnimal can talk]]. [[VocalDissonance Like a '70's soul singer]], in fact.
* ''VideoGame/{{Touhou}}'': Koishi Komeiji's presence is ignored by adults, so she sometimes serves as one of these to children.
* In ''The Sims 3'', if the ''Generations'' expansion pack is installed, a newborn baby might receive a strange doll in the mail (supposedly from a distant relative). Once the baby becomes a toddler, he or she can build a relationship with the doll, who will then become an Imaginary Friend when the toddler becomes a child. The Imaginary Friend can do tangible things like clean or get snacks or play on a seesaw with its owner, but only the owner can see it, which causes other Sims in the area to feel secondhand embarrassment for the weirdo talking to him- or herself. However, there is a special potion that the Imaginary Friend can drink to become real, and when this happens, it transforms into a normal (albeit oddly-dressed) Sim that everyone can see.
** The Social Bunny from ''TheSims 2'', an imaginary character who appears when your sims are in social failure, is a reference to ''{{Harvey}}''. If multiple sims are in social failure on the same lot, they will each generate their own Social Bunny that only they can see... but the Bunnies can see and interact with each other. Some SelfImposedChallenge rules offer a bonus for getting two Social Bunnies to flirt with each other.
[[/folder]]

[[folder:Visual Novels]]
* In ''HigurashiNoNakuKoroNi'', when Rika Furude was very young, she had a friend only she could see named Hanyuu who gave her knowledge of things like cooking and cleaning. So she was never seen to learn them. Given that Rika was the daughter of the village priest and thought to be the reincarnation of Oyashiro-sama, the local deity, the villagers quickly decide this is evidence of the reincarnation and nearly worship her.
* Mio from ''VisualNovel/LittleBusters'' has [[spoiler:Midori, Mio's imaginary friend whom only she could see. Though it's probably [[SubvertedTrope subverted]] in the end, as it would make a lot of sense if Mio deliberately allowed Midori to be created in the made-up world so she could finally live, which would indicate that Midori never actually existed in the real world.]]
[[/folder]]

[[folder:Web Comics]]
* David Hopkins directly references the movie ''Theatre/{{Harvey}}'' in "The Case of the Traveling Corpse", a story arc of ''Webcomic/{{Jack|DavidHopkins}}''. The comic's titular invisible green [[FunnyAnimal anthro rabbit]] is the "corpse", following a detective who has seen and met him several times throughout Jack's tenure as reaper/Wrath. Of course, nobody believes the detective [[spoiler:except for Justi at the end.]]
* In ''Webcomic/TheOrderOfTheStick'', SquishyWizard Vaarsuvius has finally decided to acknowledge the existence of his/her raven familiar, Blackwing. The rest of the party has chosen not to believe him/her, despite Haley being the one to remind V about the raven in the first place ''and'' [[NominalImportance giving him his name]]. It turns out Haley and Roy were trolling him, Belkar was oblivious, and Elan was [[SpoonyBard Elan]].
* Fluffmodeous from ''Webcomic/SomethingPositive.'' [[MaybeMagicMaybeMundane Possibly]]. He basically looks like a ghostly blue teddy bear, is slightly psychotic, and started to appear to [[AssholeVictim Kharisma]] after she went to prison for a murder that she ''technically'' didn't commit. Is she going crazy, and if so, who ''actually'' put that other inmate into a coma...?
* ''Webcomic/CountYourSheep'' has Ship, who can only be seen by a young girl named Katie... and her mother, her father, her grandparents, her aunt, her cousin and small animals too. However, Katie [[DisappearedDad never knew her father]], her cousin is still a baby and her grandparents refuse to acknowledge Ship's existence [[FlatEarthAtheist unless he angers them]]. This reduces to three the number of humans he can speak with.
* in [[http://gallowshumorcomics.deviantart.com/ Gallows Humor]], the female lead Alma is the only normal human so far who can see the Greek gods. it's a pretty big secret to keep when Thanatos, the god of death, decides he likes your place...
[[/folder]]

[[folder:Western Animation]]
* ''WesternAnimation/BatmanTheAnimatedSeries'' features a disturbing episode entitled "See No Evil", which features a criminal who uses an invisibility suit to sneak into his estranged wife's house and convince his own daughter that he is her imaginary friend.
* ''WesternAnimation/AquaTeenHungerForce'': In "PDA", no one believes Shake about Romulox, who turns out to be real. He returns in "The Last One".
* On ''WesternAnimation/{{Animaniacs}}'', the "Chicken Boo" skits center on someone trying to get others to believe that Boo is a chicken, a fact which isn't made clear until some circumstance causes Chicken Boo to lose his [[PaperThinDisguise flimsy but surprisingly effective disguise]].
* ''WesternAnimation/HiHiPuffyAmiYumi'' does this in the NoDialogueEpisode "Ikkakuju", where Ami tries to convince Yumi and Kaz that she really ''did'' see a unicorn, but they aren't inclined to believe Ami because she earlier tried to make up a wild story to cover her breaking Yumi's new guitar by accident.
* On ''WesternAnimation/TheGaryColemanShow'', Angelica routinely dismissed the demon Hornswoggle as a figment of Andy's imagination.
* The Evil Monkey in Chris's closet is a running gag on ''WesternAnimation/FamilyGuy''. This culminates in season 8, when Chris gets tired of nobody believing him so he actually catches the monkey and proves he wasn't making it up.
** In a single-episode version, Lois discovers she has a long-lost brother who's somewhat unhinged and talks to an invisible girlfriend. Stewie and Brian decide to place a cucumber where she's supposed to be sitting and declare, laughing, that "if it pickles then she's real". A few scenes later, an angry Lois is heard asking about the pickle on the couch.
* "The GreatGazoo" in ''WesternAnimation/TheFlintstones''.
* ''WesternAnimation/TheSimpsons'' played with this in one episode, where everyone believes that Homer's new roofer friend Ray (voiced by Ray Romano) is imaginary, but simply missed seeing him due to a series of increasingly improbable circumstances.
** The event in the hardware shop is probably one of the most plausible, but then ''Stephen Hawking'' throws it way out to left field.
* In one episode of the animated ''WesternAnimation/TeenTitans'', Raven is stuck with babysitting a set of kids. One of them ''appears'' to have uncontrolled telekinesis throughout the episode, and she blames all of it on "Bobby", her invisible super-powered stuffed animal. Raven disbelieves this ridiculous story... until the end, when Bobby ''the eight-foot-tall super-strong teddy bear'' drops his invisibility and starts to beat some serious ass on the villain trying to kidnap the kids.
** Of course Bobby ''is'' a manifestation of said kid's telekinetic powers: the girl in question acknowledges this, but insists this doesn't make him any less real. It's hard to argue with her, really.
-->'''Melvin''': Just because I imagine him doesn't mean he isn't real.
* ''WesternAnimation/InvaderZim'': The title alien is green, with no visible ears nor a nose, has a cybernetic backpack and says thing like "filthy humans". Yet, only Dib notices that he's an alien after seeing him for the first time. Other people are too dense to realise that a whale floating in midair, ejecting an escape pod, from which Zim and his robot GIR come out... is '''not''' normal! Then again, said people verge on being TooDumbToLive and having some sort of WeirdnessCensor or PerceptionFilter combined, along with simply not being present when Zim implements his schemes. The fact that "alien" can also mean someone who isn't of one's country doesn't help (this is in the case of Dib's father who simply believes Zim is just from a different country, contrary to outer space).
** Aside from Dib, Dib's sister, Gaz, knows Zim is an alien but doesn't care because "he is too stupid to take over the world."
* ''WesternAnimation/LooneyTunes''
** Hymie, Daffy Duck's kangaroo friend from the WesternAnimation/LooneyTunes short ''Daffy Duck Slept Here'' (and an obvious spoof of the original Harvey).
** Sylvester was [[RecycledScript repeatedly]] beaten up by a kangaroo (or "giant mouse", as he mistakenly regarded it) which only he would see. When he tried to show it to someone else (usually his son), they would see an actual mouse instead. Though this was subverted at least twice (with the same dialog to boot):
--->'''Sylvester:''' Listen, I don't blame you if you don't believe me...\\
'''Sylvester Jr.:''' But I ''do'' believe you, father! There he is [[RightBehindMe right behind you]]!
** Used again in another cartoon where two dogs, a bulldog named Spike and a smaller dog named Chester, decide to beat up a cat to enjoy themselves. They encounter Sylvester and chase him into a junkyard, where a vicious black panther that escaped from a zoo just happens to be hiding out. Every time Spike goes into the junkyard to thrash Sylvester, he is clawed into pieces by the panther, which he, in a dark maze of crates, thinks is Sylvester. Chester has no problem pummeling Sylvester before Spike's eyes, which convinces Spike that Chester must be tougher than him.
** Used yet again another episode involving the same characters in "Dr. Jerkyll's Hide", where once again the dogs chase after Sylvester. Away from Chester's presence, Spike ends up getting beaten up again by Sylvester, thanks to a potion that transforms him into a giant monster. Chester, of course, never sees this transformed Sylvester, thinking his buddy is being beaten by the tiny tomcat. The final loss of face for Alfie (the name of the bulldog in this episode) is his being thrashed by a fly that has also been affected by the potion, as it occurs in front of Chester's eyes.
*** The same plot was used with Sylvester and Tweety bird, with Tweety thinking a bottle of "Hyde Formula" would naturally [[{{Pun}} be a great place to hide]] from the cat. He repeatedly turns into a monster, but only Sylvester ever sees it happen, and when the other cats see him flee from the tiny Tweety they think he's nuts.
** A more well-known short, ''OneFroggyEvening'', features a man finding the top-hatted Michigan J. Frog, who would only sing and dance in front of him. Every time he tried to show someone else, he acted like an ordinary frog or just as they arrived he was done singing.
* ''WesternAnimation/TinyToonAdventures'' has its own take on ''One Froggy Evening''. Since singing and dancing animals are the norm there, however, they took it one level further: the frog was (supposed to be) ''dead''. Hamton was about to dissect the frog when it started singing and dancing. Naturally, it only sang and danced when Hamton was the only person looking at it.
* On ''WesternAnimation/PhineasAndFerb'', Candace is never able to convince her mother of her brothers' various projects being real because all evidence is destroyed by the end of each cartoon.
** A running gag is that the ''entire extended family'' except their mother is already aware of at least some of it.
* Timmy Turner has '''''[[WesternAnimation/TheFairlyOddParents FAIRY GODPARENTS!!!]]'''''
* In Mr. Hankey's first appearance on ''WesternAnimation/SouthPark''. He was a talking, singing, and dancing piece of poo from Kyle's perspective. But Kyle's friends, parents, and teachers only saw an ordinary piece of poo (along with poo smears everywhere). Kyle's friends have him committed to a mental hospital because they think he's hallucinating. Later, Chef asks them where Kyle is, and the boys tell him Kyle started seeing a magical talking piece of poo, to which Chef responds "You mean Mr. Hankey?"
** Mr. Hat's just a puppet to everyone (except Mr. Garrison), yet he can drive a vehicle, find his own way into Brett Favre's sauna, join the KKK w/o any help from Garrison, and beat up Mr. Mackay.
* Happens in an episode of ''WesternAnimation/ThePowerpuffGirls'', where a new kid has an imaginary friend, but others don't notice. So when his imaginary friend starts to play bad pranks, he got blamed until that thing fully plays pranks even without him near, forcing the girls to create their own imaginary friend when they found out that they can't beat him physically.
* On ''WesternAnimation/TotalDrama,'' [[{{Geek}} Beth]] suddenly starts talking about having a boyfriend named Brady halfway through the season, and repeatedly supplies more and more amazing skills to him. He's also a male model, which is why the only picture she has of him is clearly a promotional headshot. In both endings he shows up and turns out to actually be dating her.
* Spoofed in ''WesternAnimation/HarveyBirdmanAttorneyAtLaw'', where Harvey's client of the week, Ernie Devlin (a HannaBarbera cartoon character inspired by daredevil UsefulNotes/EvelKnievel) tries to convince Harvey that a tapir is trying to assassinate him and presents him a photo of an actual real-life tapir. Said gun-toting tapir appears later at the end of the episode to point out a critical flaw in Harvey's legal defense.
* ''WesternAnimation/BackAtTheBarnyard'': A direct animated spin off of the Nickelodeon movie, ''{{Barnyard}}''. One of the human characters, Mrs. Beady, repeatedly tries to convince her husband and anyone around her that the titular animals can walk and talk. But everyone just thinks she's crazy.
* ''WesternAnimation/SpongeBobSquarePants'' has the episode of "Bubble Buddy", where [=SpongeBob=]'s friend, an apparently inanimate bubble, is dragged around for the whole episode. At the very end, he suddenly becomes alive, grabs a Bubble Taxi, and wishes Spongebob a [[ShaggyDogStory Happy Leif Erikson Day]].
* In ''WesternAnimation/XMenEvolution'', Danielle Moonstar is found injured by Kitty in a cave and taken to the Xavier Institute. Then when Kitty wakes up the next day... No one knows anything about Danielle. It turns out she had been dreaming the whole ordeal (after she had a dirtbike accident and fell unconscious), but the images of Dani were so vivid that Kitty is determined to find her, and she drags Kurt along for the ride, if only to have a witness. [[spoiler:Eventually, Kitty manages to find her for real (she had been trapped in an underwater cave for ''two years'' - only her powers prevented her from dying) and take her to be treated at the Institute. It is revealed that Dani had unknowingly created a mental link with Kitty just before she suffered the accident.]]
* ''WesternAnimation/ThePenguinsOfMadagascar'', "Skorca!": Private is on night watch when he sees a giant orca flying through the city streets. The other penguins dismiss it as a hallucination brought on by too much candy, until they actually see it. (It's actually a balloon float.)
* ''WesternAnimation/EdEddNEddy'' 's Ed had an imaginary friend named Jib. No one believed he existed until he beat up [[ConMan Eddy]].
** Before this NoHoldsBarredBeatdown, Eddy and Edd built an imaginary trap to capture Jib, similar to the above Powerpuff Girls plan. Despite both doing this tongue-in-cheek and believing Jib is just [[TheDitz Ed]] being [[CloudCuckoolander Ed]], [[AchievementsInIgnorance it works perfectly]].
** Plank, [[CloudCuckoolander Jonny]]'s CompanionCube, is also heavily implied to be more than a hunk of wood. In one episode, he somehow "told" Jonny about Eddy's schemes, even though Jonny was [[ItMakesSenseInContext suspended in a tree far away from them]], and in TheMovie, he [[spoiler: drives a bus into a heavily populated city]].
* The Season 1 StoryArc of ''WesternAnimation/{{Rollbots}}'' is about Spin trying to convince everyone, especially Pounder, that not only Vertex is the crime leader of Flip City (though Penny eventually softens to that idea), but that he is a spiderbot (which nobody believes until Vett appears).
* From ''WesternAnimation/RockosModernLife'' when Heffer forgets to turn in an entry flyer and tries to pass the blame:
-->'''Heffer:''' I asked Filburt to do it.
-->'''Filburt:''' I was sick that day, I thought you were going to ask Rocko.
-->'''Heffer:''' Oh, yeah.
-->'''Rocko:''' But I told you I had to work that day.
-->'''Heffer:''' ''(beat)'' I asked my imaginary friend Ferb to do it.
-->'''Ferb:''' [[ThatLiarLies You lie!]]
* In Disney's Disney/TheHunchbackOfNotreDame, it's ambiguous as to whether or not Quasimodo's gargoyle friends are real or products of his imagination, and Frollo at one point reminds Quasi' that stone can't talk. Near the end, just before [[spoiler: Frollo's DisneyVillainDeath]], a different gargoyle Frollo's clinging to for support ''growls'' at him. His expression is one of [[OhCrap shocked horror.]]
* ''WesternAnimation/ChinaIl'': Baby Cake's old imaginary friend, the Dream Reamer. Who also happens to be a [[ManipulativeBastard manipulative asshole]] who collects incriminating pictures of Baby Cake's real life friends and threatens to post them on Facebook.
* On ''GodTheDevilAndBob,'' {{God}} and [[{{Satan}} the Devil]] generally make themselves invisible to everyone except for [[PalsWithJesus Bob]], though [[ChildrenAreInnocent innocent]] [[InvisibleToAdults children]] (like Bob's son [[CheerfulChild Andy]]) and [[NeurodiversityIsSupernatural insane adults]] can see them too. Bob's wife and teenage daughter, meanwhile, think that Bob is crazy and Andy is just playing along.
* Averted in ''WesternAnimation/FostersHomeForImaginaryFriends'', where everyone knows that imaginary friends are real and can see and hear them just fine.
[[/folder]]

[[folder:Real Life]]
* Happens in science way more often than you might think, for example:
** ''Germs''
** ''Meteorites''
** ''The platypus''. Researchers in 1798 who received a stuffed platypus specimen thought it was a ridiculous hoax, complete with crudely sewn-on leather flap on the bill. But, now, of course, we see the living animal. The same, flabbergasted disbelief happened in reaction to stuffed specimens of the kiwi and the King of Saxony bird of paradise.
* No one believed then-President Jimmy Carter when he claimed that he was attacked by a giant swimming rabbit while on a fishing trip until a White House photographer came forward with a picture of the event. It was a regular-sized ''swamp rabbit'', quite a bit bigger and uglier than the cute little pet-shop bunnies people think of when they hear "rabbit". Even Carter had to agree it was damn funny; he first presented it as an amusing anecdote from his trip.
* According to ''The Jargon File'', a "dancing frog" is any bug that occurs unpredictably and cannot be readily induced. Such bugs are extremely difficult to deal with. Again a reference to the cartoon (but predating the trope-wiki).
** Related is the concept of the "schrodinbug", which, for one of several minor reasons, appears only in real-life situations and not in a debugger (a coding environment which is, as the name implies, used to track down bugs). For instance, a bug might only occur when one operation happens too soon after another one, but the debugger runs very slowly so the user can analyze each step to determine where the bug is -- meaning the bug won't happen in the first place. These lead to users reporting bugs that developers can't reproduce when they examine the code.

[[/folder]]

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