"Hello everyone! I'm Amy's imaginary friend. But I came anyway."Unlike an Imaginary Friend, a Not So Imaginary Friend is real, but due to a pile-up of coincidences, mystical restrictions, an explicit or implied Weirdness Censor, 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 One Froggy Evening, the famous Looney Tunes 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 It Was Here, I Swear!. See also Cassandra Truth, Ignored Expert. If the character(s) seeing this character are not believed because they've lied in the past, it's Crying Wolf. Sometimes this character will be Mistaken for an Imposter. Often overlaps with Missed Him by That Much. 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, literally believing in it enough. The Other Wiki has an entry on the Martha Mitchell effect, cases where an individual is misdiagnosed over hallucinations that were, in fact, real.
— The Eleventh Doctor, Doctor Who, "The Big Bang"
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- If Mr. Giggles ever asks you for some cheese, say yes.
Anime & Manga
- Deus Ex Machina (and his assistant Mur-Mur) from Mirai Nikki is introduced as Yukiteru's imaginary friend, but we very quickly learn that this is not the case, he is actually God, and he's been preparing a rather sick game.
Deus: "I'm a god. Why can't I live in your imagination?"
- Given how gods in this series are shown capable of manipulating or 'editing' the memories of themselves or others, there might be a hint of Fridge Horror regarding exactly how Deus took up residence in Yuki's mind.
- The Shinigami in Death Note are a rare example of an actively hidden Non-Imaginary Friend, though most of the cast knows about them by the end.
- Inverted in King of Thorn. 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 Sailor Moon R movie. Mamoru was convinced the alien he saw upon waking up in the hospital, Fiore was only an imaginary friend.
- Kyubey of Puella Magi Madoka Magica is such that only magical girls (and those who have the potential to be such) can see him.
- Fridge Horror: 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 invisible to normalness probably involves manipulating people's minds into not noticing him.
- In the ending, Madoka becomes this to her brother (literally) and Homura. No one else has any reason to believe she exists.
- Maromi from Paranoia Agent. Or is it?
- A bigger revelation is that this is also true of Shonen Bat.
- England and his magical friends from Axis Powers Hetalia - 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.
- 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 can't see supernatural creatures, anyone who encounters Guts often wonder who the hell he is talking to over his shoulder.
- Prior to the Onslaught saga, young 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.
- Blue Monday 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.
- Disney Ducks Comic Universe:
- In one comic, Donald Duck is sent to the asylum because he is claiming that he's friends with Easter Bunny, whom only he can see. In the asylum other patients start to see Rabbit as well and he is apparently curing them from their own issues. It is hinted that Bunny could be Real After All (we never see more than his shadow).
- Another comic has an imaginary fiend which was the incarnation of a common cold. That could counter cold remedies by taking remedies of his own.
- The Newsboys Legion 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 Apokolips.
- The Flash: Then-Flash Wally West eventually learns his imaginary alien friend, Krakkl of Kwyzz, is not only real, but a speedster like himself.
- Stanley and His Monster: 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.
- The Savage Dragon has an Ascended Fangirl/Stalker with a Crush 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 She-Hulk. 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.
- In "Grounds... for Horror!" in Tales from the Crypt #29, a monster in the closet which only a small boy can see kills said boy's abusive stepfather.
- "Horror in the Schoolroom" in The Haunt of Fear #7 is based on John Collier's "Thus I Refute Beelzy".
- One issue of Runaways sees Molly falling asleep after a battle and getting kidnapped by the Provost, a supervillain who only appears in this one issue and is never seen again. She defeats the Provost and helps rescue a bunch of other kids he's kidnapped, but the adventure tires her out and she ends up falling asleep again by the time she gets home. After she tries to explain where the hell she's been for the past few hours, Nico assumes that she just wandered off and grounds her for lying about it.
- Calvin and Hobbes:
- Hobbes 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) necessarily have the "true" perspective. In contrast with most instances of this trope, Calvin appears not to care, or even to notice, that his parents and other characters don't "see" Hobbes as he does.
- One plot involves Calvin and Hobbes time-traveling shortly into the future, where Calvin should have finished a homework assignment, so he can 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 is 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 ties 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 needs 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 fairy godfather in Crockett Johnson's Barnaby, is, 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 enters, and the two steadfastly refuse to believe O'Malley exists in spite of rapidly mounting evidence to the contrary. The strip ends 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.
- The Family Circus 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 Visual Pun 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.
- The Far Side: One 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 Cul de Sac newspaper strip, Petey has a friend/nemesis Ernesto, an overbearing, insufferably smug fellow — Petey isn't sure if he really exists or not.
- One Off The Mark strip showed a group of these characters gathered: The Great Gazoo, Pasquale's guardian angel, Hobbes, DW's magical friend, Ida Know, and Not Me, with Hobbes saying "Let's not forget... Snuffleupagus started out just like us and now everybody can see him!". The caption is "Invisible Friend Support Group".
- Garfield has at least two known cases from his strips:
- Happy! by Grant Morrison has a a cynical hitman team up with a flying cartoon unicorn who's the imaginary friend of a girl he needs to rescue.
- In Kira Is Justice, 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 Calvin and Hobbes: The Series is about the same as the former.
- Interestingly enough, this makes for quite the Fridge Logic 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 Waved, other humans like the Brainstorm family (who think he's a robot) don't have that excuse.
- In To the Stars, Homura insists that there was once a fifth magical girl protecting Mitakihara, but that all evidence of her existence was erased when she Ascended to a Higher Plane of Existence. Nobody believes Homura, and even her allies consider her borderline insane. And then she starts performing actual, verifiable miracles...
- In the Battlestar Galactica fanfic Fail Better, Lucia is this to the young Laura Roslin, who stops believing in her existence as she grows up. Lucia is, of course, real, and it hurts her very much (and makes her unable to touch solid objects in the human world), but she accepts it as the "way of life". Later when she becomes human, Laura discovers that she really was real and to say it surprises her would be an understatement.
Lucia: I always knew it'll be this way... I just never knew it'll hurt so much.
- In the Naruto fanfic Invisible Fox Naruto is rendered permanently invisible at a young age by an accident, is believed to be dead by everyone, and makes no attempt to disabuse them of this. After he saves Hinata from being bullied by pretending to be a ghost, she invites him to stay with her and becomes her secret friend, until he's forced to reveal himself and is basically accepted as part of the Hyuuga clan.
Films — Animation
- In Ice Age 4: 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 a sperm whale.
- In Disney's The Hunchback of Notre Dame, 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 Frollo's Disney Villain Death, a different gargoyle Frollo's clinging to for support growls at him. His expression is one of shocked horror.
- The title character of Paranorman insists that he sees ghosts all over town, and in particular, that his recently-deceased grandmother is still inhabiting the house. The events of the film cause his family to finally believe him.
- Finding Dory has Destiny, Dory's "pipe-pal" who her parents thought was just a figment of her imagination. When trying to find her way back home, Dory gets tossed in a bucket with food for an animal at the Marine Life Institute, who turns out to be Destiny. They are surprised to find out that they both were real animals and not imaginary ones.
Films — Live-Action
- The film Harvey, based on a play. The 7 foot tall bunny called Harvey is invisible to the audience and first we are led to believe it is only a figment of the protagonist's imagination, until doors are magically opening by themselves and purses vanish and reappear. Helps that Harvey is a pooka, a trickster being from Irish folklore
- Frank from Donnie Darko. He's literally a six-foot rabbit that no-one besides the title character can see. For good reason, since he's a schizophrenic vision of said character. Or a time-traveling murder victim of that same character. Or a metaphor for the Deus ex Machina that hit the Reset Button. Or... all of the above.
- In Heart and Souls, 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.
- Drop Dead Fred centers on this trope, as it's all but stated that Fred was not just Lizzie's supposed imaginary friend that her My Beloved Smother mom Polly "cured" her from...
- In Cloak & Dagger, Davey's imaginary friend, Jack Flack, seems to demonstrate this trope periodically, as we see him picking up objects and opening and closing car doors.
- The title character in Rain Man. As a young child, the protagonist had an imaginary friend known as "Rain Man" who told him stories. Then he grew up. The "imaginary friend" turned out to be his autistic much-older brother.
- Pete's Dragon (1977) is heavy on this trope.
- In Hide and Seek, David doesn't believe his daughter when she said her imaginary friend Charlie killed his wife. 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 Darby O'Gill and the Little People.
- 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 at first. She turns out to be the spirit of his dead wife.
- Karlsson in Astrid Lindgren's Karlsson on the Roof 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.
- My Best Friend is Invisible. The invisible friend is the last survivor of an alien invasion of the Earth. The main character and his parents are actually alien abominations.
- Subverted with Good Friends. It turns out that the main character's best friend and bratty sister, who has an imaginary friend herself, are in fact imaginary themselves.
- 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. Hilarity Ensues.
- In Robert Asprin's Myth Adventures 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 Cornell Woolrich's Phantom Lady.
- Small Gods 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 "Thus I Refute Beelzy" by John Collier.
- Older Than Radio: Oscar Wilde'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 John Wyndham novel of the same name, was thought to be the imaginary friend of a young boy. It turned out 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 E.T. Gave Us Wi-Fi.
- In The Graveyard Book, Scarlett's parents think that Bod, the protagonist, is her imaginary friend. At the end, she barely remembers him.
- In the 44 Scotland Street series by Alexander McCall Smith, Child Prodigy Bertie's 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 stairI met a man who wasn't there.He wasn't there again todayOh 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 Murder the Hypotenuse. 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. Unfortunately for Alan, Gorgo turns out to be a Not So Imaginary Monster.
- In "The Princess and the Goblin" by George Macdonald, 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 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 DPR classifies Damon as "a semi-autonomous psychokinetic energy field", but Gentleman Wizard and senior official Loric prefers to call him a familiar.
- In Andre Norton's Dread Companion, 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 Cool Gate, 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.
- Bruce Coville's The Enchanted Files: Diary of a Mad Brownie. Protagonist Alex Carhart's little sister Destiny has an invisible friend, Herbert the Goblin, who later supposedly disappears after her teacher tries to convince her he isn't real (angering Angus, the titular "mad Brownie"). Later on, when the protagonists (including said teacher) travel through the Enchanted Realm, they meet Herbert and learn he's a crewman on a ship there - he met Destiny while he was on shore leave, and left with a promise to keep in touch when his time was up.
- In the ballad "The Erl-King" by Johann Wolfgang von Goethe, a boy claims he is being pursued by a supernatural entity (the Erl-King) which his father cannot see. The father believes the Erlking is only a figment of the boy's imagination, but by the end he "feels a horror" (dem Vater grausets), which indicates he (and with him, the reader) is left wondering whether the Erlking was real, after all.
- The Andy Griffith Show: "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 Imaginary Friend, 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 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.
- 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.
- Frasier: Frasier not being able to prove he's dating a marine biologist/supermodel.
- Wings: Joe not being able to prove one of his high school friends is stalking him.
- Fawlty Towers: Basil not being able to prove a guest has snuck a lady friend into his room.
- Battlestar Galactica (2003): Baltar can see (and feel) Six, which can sometimes lead to some rather frightening scenes. And sometimes hilarious ones. And for bonus points, the "real" Six has a Baltar running around that only she can see. And Baltar's Six and Six's Baltar can see each other.
- "Catalina's best friend Suzee isn't there" from Nickelodeon's Space Cases. 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.
- The Twilight Zone, "Nightmare at 20,000 Feet". William Shatner's character can't convince anyone, "There's something on the wing!"
Shatner: Oh, that guy, I've been complaining about him for years, nobody does anything about it. Here, have a copy of my autobiography.
- Spoofed here at 1:43.
- Also spoofed in The Simpsons "Treehouse of Horror IV" story "Terror at 5½ Feet" when Bart notices a Gremlin tearing apart the school bus. His reward for saving everyone's life? An eternity in a mental ward.
- Similarly spoofed on Muppets Tonight, where Miss Piggy finds herself on a plane with Shatner.
- Eric Streator in the TZ episode "Living Doll" assumes his wife or daughter are using the daughter's talking doll to send him evil, taunting messages. They assume he's lost his mind. Until he trips over the doll and falls to his death — and when the mother picks up the doll it says "My name is Talky Tina — and you'd better be nice to me!"
- In The Facts of Life, 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 Very Special Episode 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 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 Monty Python's Flying Circus, the notorious East End gangster Dinsdale Piranha 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 Northern Exposure, 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?"
- Gilligan's Island: In "Gilligan vs. Gilligan", a Russian spy arrives on the island and turns out to be Gilligan's 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 The Fugitive, 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 Unhappily Ever After 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 Jennifer Slept Here, the title character (an old movie actress who had been run over by an 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.
- The Beverly Hillbillies: 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 Home and Away, 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 The Ghost and Mrs. Muir 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.
- Doctor Who: 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 odd circumstances, leading to 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...
- Farscape has Scorpius's neural clone stuck inside John's head. John, being a Genre Savvy guy, named him Harvey.
- 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 Quantum Leap. 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 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 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 Disproportionate Retribution.
- Star Trek: The Next Generation: An alien takes the form of a little girl's imaginary friend.
- Lost in Space: 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 The Invisible Man: 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 turning on a flashlight in his presence. Jacob is later proven to be much, much more than even a typical not-so-imaginary friend.
- The Monster of the Week in the Supernatural episode "Playthings" is a spirit posing as the imaginary friend of her grandniece.
- A whole race of these called Zannas is introduced in "Just my Imagination." Unusual for this show, they are completely benevolent spirits who do everything in their power to take care of children.
- One episode of Sir Arthur Conan Doyle's The Lost World 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 The Big Bang Theory, 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.
- In the Inside No 9 episode "Tom and Gerri", Migg is this. In the opening scene, when he's begging outside Tom's apartment, Gerri doesn't see him (ostensibly because he's hidden by a car); and later, after Migg moves in, he's always in another room or out of the house when Gerri visits. She soon starts to question whether he's real at all. It turns out Migg is real, but Gerri is not - she had died in a road accident, and Tom was hallucinating her.
- In Tales from the Darkside episode "Ursa Major", a little girl tells her mother that her teddy bear is actually alive and her best friend. Naturally, her mother doesn't believe her, but plays along with it. However, when bad things start happening around the house and the teddy bear is always seen at the crime she assumes that her daughter is doing these actions at first...until the teddy bear growls at her and its eyes begin to glow.
- Zig-zagged in The Haunting Hour episode "My Imaginary Friend." We deal with a preteen boy who's being influenced by a jerkass bad boy who tries to help the kid become popular. His older brother informs him that his new friend doesn't exist and doesn't see him until he exposes himself as real. Eventually Subverted, when it turns out that the kid's Bad Boy friend and his older brother are both imaginary.
- In Thriller there's Mr. George, who gives fatherly advice to little heiress Priscilla Leggett. As her relatives attempt to arrange "accidents", George gently suggests that she go play someplace else for a few minutes; meanwhile he arranges for each of the "accidents" to backfire. George is the dead fiance of Priscilla's mother. He also arranges for his own sister to become Priscilla's guardian. This is based on an August Derleth story.
- "Bigfoot!" by the Weakerthans is about a man who is exposed to ridicule after seeing Bigfoot.
- After The Beautiful People's collective face turn in TNA, Angelina Love started being visited by a woman in the mirror named "Winter" claiming to be her "fan", who would vanish whenever another wrestler looked in it with her. Winter finally appeared to her in person during a brawl with "Las Primas" Rosita and Sartina.
- For many years (until 1985), Mr. Snuffleupagus on Sesame Street was such a character, seen only by Big Bird.
- Word of God: 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, 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 (Susan) 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 (Gina) would frequently yell at her TV set whenever she saw the scenes.
- Ironically, all the Praca employees later had their convictions overturned. It was one of many such false cases from that period. However, if Snuffy's story encouraged even one genuine victim to speak up...
- Fraggle Rock 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.
- 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.
- The Zoni from Ratchet & 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...until they suddenly become visible to all and take Clank with them through a mysterious rift at the very end.
- In Wing Commander 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 Neverwinter Nights 2: 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. Then she opens the door to her bedroom to reveal a telthor bear.
- 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 Super Mario RPG, 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...
- In Psychonauts, the childlike, possibly-insane Reluctant Mad Scientist 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 Mad Scientist Dr. Loboto. And indeed, once you rescue him, Mr. Pokeylope can talk. Like a '70's soul singer, in fact.
- Touhou: Koishi Komeiji's presence cannot be concsiously percieved 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 The Sims 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 Self-Imposed Challenge rules offer a bonus for getting two Social Bunnies to flirt with each other.
- Dawn, the Player Character from Contrast is only visible to Didi and Vincenzo, as revealed in the ending. While Dawn can tangibly interact with the world, she doesn't tend to do so when anyone else is watching, giving Didi a bit of a reputation as an escape artist. It is later established that she was a former assistant of Vincenzo who became trapped in the "shadow dimension."
- In Higurashi: When They Cry, 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 Little Busters! has Midori, Mio's imaginary friend whom only she could see. Though it's probably 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.
- In the third episode of GEOWeasel, Mitri introduces his imaginary friend, Bob, to Weas. Weas is sceptical at first, but is convinced when he's knocked to the ground. It is later discovered that Bob killed two men, leaving enough imaginary evidence to trace the murder to him.
- David Hopkins directly references the movie Harvey in "The Case of the Traveling Corpse", a story arc of Jack. The comic's titular invisible green 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 except for Justi at the end.
- In The Order of the Stick, Squishy Wizard 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 giving him his name. It turns out Haley and Roy were trolling him, Belkar was oblivious, and Elan was Elan.
- Fluffmodeous from Something*Positive. Possibly. He basically looks like a ghostly blue teddy bear, is slightly psychotic, and started to appear to 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...?
- Count Your Sheep 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 never knew her father, her cousin is still a baby and her grandparents refuse to acknowledge Ship's existence unless he angers them. This reduces to three the number of humans he can speak with.
- In 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...
- In A Girl and Her Fed, even the Girl herself thinks her imaginary friend—the ghost of Benjamin Franklin that no one can see but her—isn't real, and assumes he's just a leftover from a really bad LSD trip she had in college. Turns out he really is real. It's unclear why Girl didn't figure this out earlier, though, seeing as he got her rich by traveling into the future to bring back stock tips (and really good alcohol).
- The Turkish Republic of Northern Cyprus exists as a character in Polandball, yet nobody else, save Turkey or perhaps Cyprus itself, can actually see him since they don't recognise him. Thus, he keeps getting mistaken as an imaginary friend◊ of Turkey's.
- In Archipelago Claire's imaginary friend Benjamin is actually the holographic avatar of the Artificial Intelligence that runs the ancient war machine buried under her home. He appears to Claire alone in order to save power, because a little girl wouldn't question such things, and because he saw that she was lonely.
- Beau to Vox in the Creepypasta story Vox And King Beau. Beau visited Vox frequently as a child, but nobody besides her ever saw him, so her mother and everyone else in her life assumed he was an imaginary friend. They had a falling out that caused Beau to leave before Vox was a pre-teen; and in the 10+ years between that and the start of the story, Vox forgot about him entirely... until he starts showing up in her apartment, standing over her bed while she sleeps. Cue Vox trying to figure out if Beau is real or a hallucination.
- Cardboard Friend/ Box Friend. He claims to be Gregory Casket's imaginary friend, but is actually a ghost who feeds off of insanity, which poor Gregory had lots of.
- Batman: The Animated Series 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.
- Aqua Teen Hunger Force: In "PDA", no one believes Shake about Romulox, who turns out to be real. He returns in "The Last One".
- On 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 flimsy but surprisingly effective disguise.
- Hi Hi Puffy AmiYumi does this in the No Dialogue Episode "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 The Gary Coleman Show, 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 Family Guy. 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.
- During a custody dispute in "Petarded", Peter convinces the judge to allow him to call to the stand his surprise witness, "the ghost that never lies". What seems to be an obvious ploy to drum up support for himself is then subverted, much to his own annoyance, when the ghost correctly identifies him as the one responsible for the events that led to him losing custody of his children.
- "The Great Gazoo" in The Flintstones.
- The Simpsons:
- Played with in "Don't Fear the Roofer", when everyone believes that Homer's new roofer friend Ray Magini (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. Afterwards, Lisa points that "Ray Magini" is an anagram of "imaginary".
- In "The Girl Code", Lisa develops an app that predicts the consequences of social media postings. To her surprise, the app develops consciousness and begins to talk to her, but when she tries to show it to others, the app won't respond. It turns out the app is as insecure as Lisa is and is afraid of going live and having to suffer through people's inane postings. It finally reveals itself to the world after Lisa frees it inside the Cloud.
- In one episode of the animated Teen Titans, 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.
Melvin: Just because I imagine him doesn't mean he isn't real.
- 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.
- Alternate interpretation. The girl's power allows her to turn imagination into reality. Bobby is an imaginary friend who became real. The trope still applies either way, though.
- Invader Zim: 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 Too Dumb to Live and having some sort of Weirdness Censor or Perception Filter 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."
- Looney Tunes
- Hymie, Daffy Duck's kangaroo friend from the Looney Tunes short Daffy Duck Slept Here (and an obvious spoof of the original Harvey).
- Sylvester was 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 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.
- A more well-known short, One Froggy Evening, 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.
- Tiny Toon Adventures 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 Phineas and Ferb, 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 FAIRY GODPARENTS!!!
- In Mr. Hankey's first appearance on South Park. 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 The Powerpuff Girls, 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 Total Drama, 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 Harvey Birdman, Attorney at Law, where Harvey's client of the week, Ernie Devlin (a Hanna-Barbera cartoon character inspired by daredevil Evel Knievel) 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.
- Back at the 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.
- SpongeBob SquarePants 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 Happy Leif Erikson Day.
- In X-Men: Evolution, 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. 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.
- The Penguins of Madagascar, "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.)
- Ed, Edd 'n' Eddy 's Ed had an imaginary friend named Jib. No one believed he existed until he beat up Eddy.
- Before this No-Holds-Barred Beatdown, 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 Ed being Ed, it works perfectly.
- Plank, Jonny's Companion Cube, 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 suspended in a tree far away from them, and in The Movie, he drives a bus into a heavily populated city.
- The Season 1 Story Arc of 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 Rocko's Modern Life 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: You lie!
- China Il: Baby Cake's old imaginary friend, the Dream Reamer. Who also happens to be a manipulative asshole who collects incriminating pictures of Baby Cake's real life friends and threatens to post them on Facebook.
- On God, the Devil and Bob, God and the Devil generally make themselves invisible to everyone except for Bob, though innocent children (like Bob's son Andy) and insane adults can see them too. Bob's wife and teenage daughter, meanwhile, think that Bob is crazy and Andy is just playing along.
- Foster's Home for Imaginary Friends: "Imaginary friends" in this series are Tulpas, but one episode has a fake millionaire who thought imaginary friends were ones only their creator could see, and only agrees to give Foster's money if they "showed" him those.
- Uncle Grandpa once thought the tree in the RV was talking to him. Whenever Mr. Gus and Pizza Steve are around, the tree never spoke, so they think Uncle G has finally lost it. In reality, an escaped criminal was hiding inside the tree, tricking Uncle Grandpa into stealing stuff for him.
- An episode of Miss Spider's Sunny Patch Friends has Squirt befriending a bug of microscopic size, and due to the fact that she was too small to be seen and too shy to speak to anyone else, Squirt's family naturally believed she was an imaginary friend.
- The Rugrats spin-off All Grown Up! had an episode called "Izzy or Isn't He?" where Dil made up an imaginary alien friend named Izzy who was believed to exist by pretty much everyone in town, which ended up getting Chuckie in trouble when he accidentally ran over Izzy while mowing the lawn. At Izzy's funeral, Dil puts an end to everything by admitting that Izzy doesn't exist, but once everyone else is gone he tells Chuckie that Izzy wasn't killed and was watching the whole thing in one of the seats in the back. The very end of the episode shows one of the chairs with the seat part down even though no one's there.
- Happens in science way more often than you might think, for example:
- 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.
- Can occur in Real Life when one person talks about a friend or significant other that other acquaintances, for whatever reason, never meet.
- 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.