"From now on you'll have no identifying marks of any kind. You'll not stand out in any way. Your entire image is crafted to leave no lasting memory with anyone you encounter. You are a rumor, recognizable only as déjà vu and dismissed just as quickly. You don't exist. You were never even born. Anonymity is your name; silence, your native tongue. You're no longer part of the System. You're above the System. Over it. Beyond it. We're 'them'. We're 'they'. We are the Men in Black."
His sister, Ryoko Mendo, is served by a team of kuroko, kabuki stagehands that officially aren't there and fulfill her every order, including playing her horse when she's feeling particularly dramatic. They pop up from the strangest places and are much more organized than her brother's minions. Of course, that does not stop the two groups having tea together when their masters are not throwing grenades at each other and complaining about their difficult life.
In Digimon Savers, the main characters are members of an MIB organization, DATS. They even get nifty mind-erasing neuralizers to go with the job. However, these Men in Black lack the Black. Seriously, everyone in DATS wears brightly colored uniforms.
NERV agents in Neon Genesis Evangelion. Unusual in its depiction, as the agents act like real agents. They're only in a couple scenes throughout the whole thing, but their influence and subtlety is implied to be enormous. They don't go Cowboy Cop. They don't need to.
Higurashi: When They Cry has strange "janitors" seen at different points in the story. It's not clear what they are doing, who organized them, or even if they're not just normal people and any suspicious actions they appear to do is just a manifestation of a character's paranoia. They're part of a Government Conspiracy to cover up the medical research going on in the village.
The GOP in Kurau Phantom Memory is populated by Men in Black, with the one in charge being a female version, complete with cool sunglasses and bad-ass attitude, inspired by her hatred for the two protagonists and their kind.
The main characters of Ga-Rei -Zero- are essentially MIB working to protect the ignorant masses from supernatural threats.
Detective Conan's black-clothed organization, who are responsible for turning Shinichi into what he is now. Though they seem to be a very small criminal gang, they are extraordinarily powerful, mainly because the world at large doesn't even know they exist. They basically live off of this trope, committing crimes by blackmailing others into doing it for them, killing those who learn of their existence and anybody they might possibly have contacted, and even killing members whom they consider even a potential threat. Many of their members even wear black outfits and shades (when not in disguise)! It is implied the organization is at least somewhat larger than what we see (how large is anyone's guess) and that the main foes are in fact several of the top ranking members that report directly to the boss. Also, they are always in disguise, because their very existence is a secret to the world and they want to keep it that way.
In chapter 214 of Mahou Sensei Negima!, Kaede and Setsuna are dressed quite literally as Men in Black, though perhaps WIB would be more appropriate. Regardless, in looks they fit the part perfectly.
Ciel from Tsukihime usually dresses up as a teacher or a Church Militant, but she once put on fancy to retrieve her Empathic Weapon that had befriended That One Guy. Apparently she thought it would attract less attention or something. (Well, she can just use her Magical Eye to wipe people's memories, but still.)
Oddly, the title page for one chapter of Ai Yori Aoshi has Tina and Mayu dressed as Men in Black. This has no relationship to anything in the story.
In Katekyo Hitman Reborn!, since it centers on the mafia world, practically everything is all about black suits and ties. The younger tenth generation kept it generic by wearing white shirts, but their older versions go with colored shirts depending on their flames and TYL Tsuna wears a pinstripped suit.
Saruwatari (best known as the Hair Guy) and other Industrial Illusions and Kaiba Corp employees from Yu-Gi-Oh! have this theme going on.
CP9 in One Piece qualifies, given that everyone thought that the Cipher Pol divisions only went up to 8 (similar to how MI6 exists as the super-secret extra number in the James Bond continuities), but it's different in that CP9 has a number of very colorful characters who operate under what are presumably their real names. A number of literal "men in black" work for them as mooks, however. Another alternative would be Baroque Works, whose upper membership operated in a more conventional cloak-and-dagger scenario, with people like Mr. 2 a.k.a. Bon Clay a.k.a. Bentham.
Roger Smith from The Big O, emphasis on the "B": everything he wears (apart from his white shirts) has to be black, as does anything worn by his butler and android companion. Subverted, though, in that he's not a shady government agent, rather a freelance negotiator, but he is in the business of keeping secrets, like his Humongous Mecha-based vigilantism.
The Mooks of the Kiga Group in Mawaru-Penguindrum wear a more classic combination of black overcoat and fedora, but they are definitely men in black in appearance and action.
A bunch of these show up in Marika's cafe in the pilot of Bodacious Space Pirates. Later, Chiaki identifies them as working for various government agencies. Possibly subverted in that they were mostly there to protect her.
Ano Natsu De Matteru has this as a Running Gag in the movie they're making, and then it turns out that a member of the main cast is their leader, and a relative of another one who was referred to a few times is a member of the real MIB. They even show up in the final episode as The Cavalry!
Tsuritama has Akira and his crew of Indians. They all appear to be a part of a mysterious organization called "Duck" (as in the aquatic fowl) that monitors alien activity on Earth, namely Haru and Coco.
Subverted in The Filth, where the secretive operatives of The Hand actually wear day-glo suits and wigs. It turns out the suits are designed to inspire psychosexual urges to make whoever looks at them want to repress them like a bad memory, in effect making them invisible but still able to exert authority.
In Grant Morrison's Doom Patrol run, the Men in Black are only one subgroup of a massive organization that has different suits for ostensibly different purposes (the Men in Green, for instance, are more scatterbrained, whereas the Men in Mauve are implied to be completely ruthless).
Man In Green: There are ranks and there are orders. There are faces at every window. Just be glad they didn't send the Men In Mauve.
The Big Book of the Unexplained has a chapter on Men in Black, of which there are several varieties. All have access to various suits and uniforms and unusually well-taken-care-of older model cars:
In Fables, the army of wooden soldiers that attack Fabletown dress in typical MIB attire.
Gleefully subverted in an issue of Tales of the Teenage Mutant Ninja Turtles, in which two Men in Black show up to debrief the turtles' friend Casey Jones after an encounter with an alien robot. However, the agents are actually aliens themselves, testing human reactions to see whether Earth is ready to be contacted openly by their race.
Gold Digger has Agency Zero, which was a traditional Super Team that switched over to this trope to avoid the downsides of traditional superheroism (supervillains going after them or their loved ones, etc.)
In the universe of Little Victory, England, and several of the Commonwealth nations, employ the O.D.A., who go with a Men in Black look utilizing trench coats and bowler caps.
Parodied in some European Donald Duck comics with the secret bureau T.N.T. (Tamers of Non-human Threats), of which Donald and his cousin Fethry are freelance agents. Their job is to take care of supernatural or alien threats against humanity, while keeping such things hidden from the general public — though there's an almost complete lack of Laser-Guided Amnesia (they resort to making up stories about special effects or humans in disguise), no code names, and the uniform resembles a janitor's outfit more than the usual stylish suits and shades. All this, combined with the fact that they're always in a protagonist role (and their boss being a Reasonable Authority Figure) makes them much less sinister than many of the example of this trope.
The Maxx featured something of a parody of MIBs, a squad of quasi-informed, dark-suited supernatural investigators who are led by psychic messages delivered from the ashes of their dead founder, which they carry around in an urn.
The 6-issue comic that Men In Black was originally based upon. There's a number of differences: one, threats both explicitly supernatural and mundane are also investigated; two, Kay is a lot nastier, acting more like a walking branch of the SCP Foundation; three, we don't see any other MIBs apart from Jay and Kay.
In Discworld crossover fanfic Slipping Between Worlds, when a group of soldiers from "Roundworld" inadvertently arrive in Ankh-Morpork, they set off a The War of the Worlds mass panic about alien invasion. Two of the displaced British squaddies, having stolen civilian clothes, blend into a rally in Hide Park and, un-noticed in the crowd, gleefully watch Ankh-Morpork's homegrown UFO nuts demanding an end to Vetinari's clearly blatant cover-up of proof of alien visitation. Discreetly monitoring the speakers, there are indeed Men In Black - Lord Vetinari's Dark Clerks, assigned there to listen and take notes....
Men In Black, the movies and the series are unsual; they present Men in Black in a positive light. Anything bad they do is usually Played for Laughs, such as the uncertainty over how much brain damage the memory eraser does.
The Lowell Cunningham comic series from which the movies were most directly adapted were less positive: sympathetic, maybe, but these defenders of the Earth were not noble.
The "Low Men" from Hearts In Atlantis.
The Blues Brothers: Jake and Elwood are dressed in black suits, white shirts, and shades. When they relentlessly question a woman while trying to get their band together, she says "Are you the police?" and Dan Aykroyd replies, in perfect police deadpan "No, ma'am. We're musicians." Jake and Elwood's costumes were left over from SNL skits in which they played Secret Service agents guarding Chevy Chase.
The Agents of The Matrix (though they technically wear dark green instead of black, save for Smith in the sequels) are programs that act as the Machines' enforcers within the film's titular Lotus-Eater Machine; they're generally tasked with hunting down human rebels, though as shown in the second film, part of their job is also hunting down programs from their own side that have gone rogue. As part of the Masquerade, they're given very generic names ("Smith," "Brown," and "Jones" in the first film, and the "upgraded" ones "Jackson," "Johnson," and "Thompson" in the second) and seem to hold some ambiguous government position that gives them command over both the police and military.
The MMORPG The Matrix Online, set after the films, introduces Agents Black and Gray. Since the Machines and humans are no longer at war at this point, Agent Gray is the only Agent to have prolonged contact with humans, and this distinction almost makes him feel... "proud".
The Strangers in the film Dark City are actual aliens, which shows in the way they get details wrong: notably, their idea of common, everyday names includes "Mr. Book," "Mr. Wall," and "Mr. Hand."
The bleached-blond Strangers of Knowing (another Alex Proyas film) also seem to embody this trope. They're either angels or aliens, depending on your interpretation.
Lilo & Stitch subverts this trope with Cobra Bubbles, who dresses like a Man In Black despite being only a social worker making sure Nani takes care of Lilo. This becomes a Double Subversion at the end of the movie, when we discover that he used to be a CIA agent responsible for dealing with alien visitors.
The heroes of Laputa: Castle in the Sky are pursued by a quartet of Men In Black (whom they at first call "kuromeganetachi", "the guys in dark glasses"), who indeed turn out to be shady government agents (with an even shadier hidden agenda).
Several films dating from the time of J. Edgar Hoover featured G-men as an early version of the MIB. Those steely-eyed, strait-laced, straight-jawed, two-fistedsuit-and-tie and hat-wearing (to hide the stuntmen) heroes of the silver screen. Ah, the days when you didn't use Laser-Guided Amnesia, you just told people to shut up in the name of the US Government. And they did! Of course, all this came crashing down when Hoover's image got revamped into that of a power-hungry transvestite, wantonly violating the civil rights of anyone whose politics he didn't agree with.
The President's Analyst from 1967 defied the cultivated image of the G-man early on, showing them as suit-and-tie and hat-wearing, quick to kill, unquestioning drones, all shorter than their stunted leader whose grudge against the title character was based on moral differences. Most other spy agencies fared little better: a major scene has spies of all stripes sneaking up on the analyst in a grassy country meadow. All of them, from FBI men to African agents with tribal face scars, to a Genghis Khan-looking Asian, wearing the same regulation black suit and tie (only a Russian agent has the sense to dress like a farmer).
Barton: "That kook said something about aliens being behind the whole thing."
The Chief: "Aliens? Suuure. Listen, Mexicans and Canadians are always a problem. Next thing you know they're going to be blaming it on little guys in shiny suits from Outer Space!"
The alien-hunting organization, hidden beneath a cement factory, run by K. Edgar Singer in Muppets from Space.
Repo Man featured one of the most popular concept of the Men In Black before the MIB movie came out. They're all tall, pale, and have unnaturally-shaped and -colored blond hair.
The Brother From Another Planet is an escaped alien slave. Two alien slave-hunters are after him, dressed in black suits and posing as INS agents. They are utterly unconvincing in their oddly-affected manner. One woman angrily bawls them out in Spanish, the words "Johnny Cash" and "Roy Orbison" heard in her rapid-fire shouting.
Hellboy features regular human agents in suits and ties alongside the superpowered specialists. They tend to not fare particularly well.
Laserblast has a character who's obviously supposed to be one of these despite him wearing the clever disguise of an olive-green casual suit straight from the depths of The Seventies.
In Thor and possibly other Marvel Cinematic Universe films, the agents of S.H.I.E.L.D. dress and act like Men In Black, even though they're portrayed as good guys once you get to know them.
The first Iron Man film defies this trope to an extent. S.H.I.E.L.D. fulfill many of the traditional MIB roles, but are affable, a bit goofy and not very powerful (despite their high-tech lockbreaking device).
Other examples of the MCU show this well may be Obfuscating Stupidity, and that the friendly/goofy facade may well be a deliberate tactic to throw potential threats off or to gain trust faster. Coulson is, of course, the prime example.
The fact that they are, collectively, the Anthropomorphic Personification(s) of conspiracy theories takes them to the point of being a De Construction: when we get a POV from one of them, it notes that he is unsure whether he works for the government or went into the private sector, recalling it different ways on different days (and rationalizes this to himself by saying that "only suckers still think there's a difference"), speaks almost entirely in cliched one-liners, and has no real identity as himself. And because all the Spookshow agents are just MIB tropes without any idea what they're really doing (since none of the theories agree on that), it's easy for Mr. World to come in and take over, just by acting like the sort of person who would be running a huge conspiracy.
The mysterious men in the Wayside School books are there mainly for surrealistic flavor. There are three of them: a bald man, a man with a black mustache, and another man with a black mustache who also carries an attaché case. Their appearance is random, but usually has a connection to a character making life decisions. In one instance, they offer an emotionally fragile boy a choice between safety or freedom. When he chooses the latter, they hand him a contract, which he signs, and then leave. No explanation is given as to what that contract means, although it's shown that that character no longer has to do anything he doesn't want to, like take tests or do homework.
The Ackerberg Institute in Michael Dahl's Finnegan Zwake books are these, down to the sunglasses and obvious pseudonyms.
The Gentlemen of Last Resort in Nation by Terry Pratchett, who owe allegiance to the British Crown but not to the actual monarch, and know the full version of the Magna Carta, which is seventy times bigger than the official version. They wear black suits, and are named Mr. Black, Mr. Brown, Mr. Red and Mr. Amber.
Also the 'Dark Clerk's in Discworld. The History Monks are 'Men in Saffron' in a nod to this trope.
Hearts in Atlantis by Stephen King features the sinister "Low Men in Yellow Coats" who, in addition to their gaudy yellow outfits, drove cars that exuded a feeling of being alive (they were). They're actually aliens searching for the main character's Reality Warper friend, an old man (played by Anthony Hopkins in The Movie). They're not afraid to bribe and kill to get what they want either, though they don't so much go in for memory-suppression. This is expanded upon in The Dark Tower.
Ralph's initial impression of the "Little Bald Doctors" is of alien MIBs in Insomnia.
Subverted in Mercedes Lackey's S.E.R.R.Ated Edge universe in which her covert government elf hunting organization dress are the Men In Green. The green is because of their special suits, which make them invisible to the Sidhe they're after.
The Organization in Matt Ruff's Bad Monkeys, complete with NC guns (Natural Causes) which make it look like their victims died of either a heart attack or an aneurysm.
Played for laughs in the Kitty Norville series. The titular character notices that human employees of a vampire happen to act like Men in Black - well-dressed, mysterious, brusque and emotionless, and the normal law enforcement is at their beck and call. However, once Kitty sees behind the scenes she realizes that they are more or less normal people, and they were oblivious to their appearance until Kitty pointed it out. She uses them to intimidate someone who's being annoying and they enjoy it.
The Laundry Series has, well, The Laundry, the British department tasked with dealing with cosmic threats. Unlike most of their counterparts here, and like British Government departments in real life, funding is a main concern and middle-managers are perhaps a slightly bigger threat to national security than shoggoths. Also mentioned are the Black Chamber (the US counterpart, with far better funding and far fewer morals), the GSA (modern German Men in Black, nicknamed the Faust Force), and the Thirteenth Directorate (Russian agency, descended from certain KGB elements), among others. The "black suits and sunglasses" part is averted, though, since they are civil servants.
The Mothman Prophecies the book talks about MIB agents snooping around town where the sightings were going on. This book is, in fact, probably the Trope Codifier, and is based on witness testimonials from actual people author John Keel interviewed about a rash of UFO/monster sightings in rural West Virginia. The movie made no mention of them.
The Men in Black described were the creepiest sort as well. They had reptilian features, always sported a Slasher Smile, didn't quite seem to know how to use the correct inflections in their speech (much like the G-Man from Half-Life), were completely puzzled by everyday objects, drove dated cars that were somehow brand new, and sometimes giggled unnervingly. One of them called himself "Indrid Cold".
Hunt For The Skin Walker the book mentions reports of men driving around in black Cadillacs in a place where seeing a car would be extremely unusual.
Good Omens has The Them speculate about MIB, who they reckon probably cause traffic accidents because of all the big black cars going around telling people they haven't seen aliens. Unlike most of Adam's ideas they don't show up, although it's possible that America did suddenly start swarming with them and none of the main cast heard about it.
Declare, by Tim Powers, features a mixture of international intrigue and the supernatural; there are several spy agencies hidden within larger spy agencies responsible for dealing with the djinn. Since the book draws its roots from hard espionage, though, said spies do not wear black suits and sunglasses, nor are they there to cover things up from the public. (Though they do cover things up from pretty much everybody as a matter of course.)
H.P. Lovecraft mentioned a sort of precursor version in The Shadow Over Innsmouth — Federal authorities descend on the titular Town with a Dark Secret, dynamite half the buildings, send many of the inhabitants off to secret prisons, and launch torpedoes at the offshore underwater city. The Deep Ones take it as just a temporary setback.
Once More from the Top by A. Scott Glancy has two apparent MIBs interviewing a old soldier who survived the Innsmouth operation, but also subverts the trope by having it be revealed that the Secret War against the Deep Ones is a shoestring operation because the authorities decided to suppress the evidence rather than confront it.
In Adaptation by Malinda Lo, sinister federal agents are spying on Reese, the main character. They kidnap her and take her to a secret government facility. Lampshaded- when her friend refers to them as Men In Black, Reese asks, "Isn't that a Will Smith Movie?
Victor Charlie in Mr Blank and its sequel is a Man in Black in service to the Little Green Men, though it's possible he has other more sinister motivations (how you can get more sinister than that is best left to the imagination). His brain has been repeatedly scrambled to the point that he can only communicate in pseudo-science words and outdated slang.
In Monster Hunter International, the Americans' Monster Control Bureau uses intimidation and various kinds of underhanded acts to maintain the masquerade by silencing witnesses to supernatural creatures, often acting as if they're from other federal agencies to hide the existence of the MCB from the general public.
In the Paradox Trilogy, the Joint Investigatory Spatial Anomaly Task Force, more commonly known as the Eyes. They are tasked with both killing phantoms and hiding their existence from the general public, including mind-wiping or killing those who learn too much.
Live Action TV
The X-Files occasionally had Men in Black as nameless grunts for the Ancient Conspiracy that ran the government. However, when Men in Black were specifically referred to in the episode Jose Chung's "From Outer Space", it was spoofed by casting Jeopardy's Alex Trebek and wrestler/future governor Jesse "The Body" Ventura in the roles. The Celebrity Paradox was zig zagged: the MIB played by Ventura was described as "creepy," while the one played by Trebek "looked incredibly like Alex Trebek," which made those reporting them seem all the more crazy. Meanwhile, another witness in the same episode describes Mulder himself as a man-in-black-government-authority-figure type.
In the episode "Dreamland", Mulder was dropped into the body of an MIB when he switched his body and life with a character portrayed by Michael McKean, who complains that his job is a good deal more tedious than popular belief would have it.
Torchwood's members are, essentially, Men in Black who are doing the MIB equivalent of Not Wearing Tights. They wipe memories of alien encounters as well as confiscate, and reverse-engineer any alien technology which finds its way to Earth. What do they get up to behind the scenes? Well, in the case of Torchwood 3 (Cardiff) at least... lots of sex.
In Power Rangers S.P.D., SPD becomes an MIB organization whenever time travel becomes involved. After their second team-up with the Dino Thunder Rangers, Doggie goes so far as to erase both team's memories - including his own.
Power Rangers RPM, a five-year-old Dr. K was taken away kidnapped by Men in Black and was placed into an organization called Alphabet Soup.
Earlier, Power Rangers Lightspeed Rescue's members were approached, and recruited, by pairs of these. The Rangers themselves, by contrast, were much more open than any previous team, demorphing in public after their first battle.
Although not fitting the "secret government entity" mold of the trope, the Sea Shepherds portrayed in Whale Wars operate black ships, a black helicopter, and in one episode, Peter Bethune wore a black "commando suit" as he put it when he boarded the Japanese whaling vessel Shonan Maru #2.
CSI: Crime Scene Investigation once lampshaded this part, when one of their suspects was actually being watched by the government. Grissom calmly said, "I guess we'll be expecting some men in black suits with Ray-Bans around anytime soon."
A band of men in black suits once tried to steal a body from the morgue (the as-yet-unidentified father of another Victim of the Week) only to be thwarted by Morpheus AKA Dr. Langston and a ton of Bullet Time shots. These didn't work for the government, however, as they had a number of Russian mob tattoos.
Mr. Baxter has several of these characteristics in the mystery miniseries Oliver's Travels.
In the SciFi Channel's game show Cha$e, the "Hunters" are Men in Black tasked with hunting down and tagging the contestants. They move at a brisk walk, stone-faced, unless they see the runners. It can be surprisingly creepy, despite the amounts of Narm their "heads up displays" provide.
Warehouse 13 features two Secret Service agents who are unknowingly recruited to become MIB-like enforcers. Lampshaded in Season 4:
Guy who thinks his wife's turned into a monster: Are you like the Men In Black?
LOST has several creepy suited characters at certain points, such as a mysterious lawyer who demands proof that Kate is Aaron's mother, which she isn't, or Richard Alpert watching baby Locke through a hospital window (which adult Locke told him to do) and particularly Matthew Abbadon, a Scary Black Man who had posed as a physical therapist to tell Locke to go on a Walkabout (thus ending up on The Island), set up the Freighter Crew AND knew about the Oceanic Six hoax. However, the term MIB, or Man in Black, is most commonly used to refer to a mysterious, currently unnamed man wearing black clothes who appears in the fifth season finale and is the archenemy of Jacob, the "Man in White."
As of season 6, we now know one other longtime name for the Man in Black: the smoke monster.
A cooking show, Alton Brown's Good Eats, has fun by invoking this trope whenever they make note of FDA standards. There are always three Men in Black, and the only one who talks is played by Brown himself.
Section 31 from Star Trek, introduced in Star Trek: Deep Space Nine. They are essentially the MIB for The Federation. Technically they do not exist, they have no headquarters, their agents are scattered incognito among Starfleet and other groups. They explain that whether or not you accept an invitation to join, they manage to use you to further their goals anyway. They said that they have existed since the beginning of Starfleet, and Star Trek: Enterprise revealed this to be true. Their goal is essentially to protect the Federation's interests at all costs. Their clothing isn't the black dress suit, but a comparable futuristic black leather outfit.
To clarify, their organisation's goal and name derives from Article 14, Section 31 of the original Starfleet Charter, which allows the rules to be bent or even suspended whenever Earth is threatened. And considering that Earth has made a lot of enemies, that's pretty much a full-time gig.
Morden was the Shadows' MIB. He could give you anything you wanted, for a price.
The ending of the episode "A Spider In The Web" attempted to set up an arc involving an MIB-esque organization called "Bureau 13". When JMS found out there was already an RPG with that name, they were never mentioned again. Except in a novel where they were renamed Department Sigma. It was mentioned that they change names semi-frequently to make tracking them harder.
Ocean Girl had an MIB organization called PRAXIS (Preventative Response And eXtraterritorial Intelligence Service) as antagonists in Season 4. They even had their own faux-Mulder and faux-Scully.
Parodied in Wizards of Waverly Place with the Emergency Wizards, agents of various magical species who dress in black suits, with the mandate to keep mortals in the dark regarding the existence of wizards.
One episode of Even Stevens has Louis and Twitty believing Beans is an alien, which is further reinforced when a MIB is after Beans. Turns out he works for the library and was after an overdue book.
Subverted with Argentine comedy show Caiga Quien Caiga and its multinational versions (Brazil, Chile, Italy and Portugal to name a few), in which the "MIB" part stays only in the presenters and reporters' attires; otherwise they are very (hyper)active and the funny-guy types, even though they deal with Serious Business from time to time (most of the staff in the Brazilian version, for example, is made up of stand-up comedians, after all).
In a delightful call-back to the more classical conspiracy Man in Black, the NUMB3RS episode "Dreamland" featured a mysterious Pentagon agent by the name of Floyd Mayborne. Claiming to be from a nebulous "Department 44", he wore outdated clothing, spoke in outdated phrases, displayed at once incredibly in-depth knowledge of advanced technology yet was fascinated by mundane objects and confused by social norms, not to mention his inexplicably high clearance, "invisible cell phone," and ability to seemingly appear and disappear at will, the mysterious Mr. Mayborne fit all the criteria for the classical Man in Black. In subversion of the more modern interpretation of the Men in Black, he was not only a willing and helpful part of the investigation, but was also instrumental in solving the case. Furthering this, he wasn't trying to cover up anything alien, but stop development of a weapon that wasn't just failing to work properly but was soaking up money like a sponge.
One episode of Castle had Rick Castle call in some help from a friend who at least played the part of being in the CIA, though whether he really was or not is only useful in figuring out whether the dead guy in the case Castle and Beckett are working on was actually in the CIA. The friend comes and goes into the wind, a la Batman, has to be very secretive about everything, and, in not so many words, tells Beckett and Castle, "I can tell you, but I might have to kill you."
Kamen Rider Dragon Knight has the No Men, a sort of No Celebrities Were Harmed version of the Men in Black. They were attempting to capture the Kamen Riders (succeeding only with the main character, until he escaped) until they were able to determine who the real bad guys were.
Heroes: Primatech, for most of the series. Later on, the Department of Homeland Security gets in on the action.
The Sarah Jane Adventures Season 4 episode "The Vault of Secrets" features the return of the Alliance of Shades from the Doctor Who animated serial "Dreamland". While they used to collect evidence of aliens and erase memories, they are now mostly defunct and only guard the titular vault.
"The Idiot's Lantern" features a few sinister men in black from the fifties who make people disappear. They're just regular, overwhelmed government agents who have no idea what to do about faceless "zombies" other than hide them.
The Big Bads of Steven Moffat's run are the Silence, a.k.a. the Slender-Men in black, who look like The Greys in suits. They can make people disappear (by disintegrating them), and messing with your memory is their main gimmick — you forget they exist as soon as you look away from them.
The main character of Dark Skies first joins, then goes on the run from an MIB-type organization (Majestic 12).
Fringe has an interesting variation in the form of The Observers, strange hairless men in black suits and hats, who exist outside of normal time, have been present at virtually every important historical event, and speak with an odd, stilted inflection. They subvert the usual behavior of the MIB in that their Blue and Orange Morality dictates absolute noninterference (except when fixing an earlier interference). As such, they try not to interact directly with people at all, do not employ Laser-Guided Amnesia, and make no attempt to cover anything up. They just...observe.
At the very end of Community episode "Epidemiology" they show up and roofie everyone so they'll forget the zombies.
Honey, I Shrunk the Kids: The Series had a group of these. They were involved in all sorts of conspiracies, up to and including the meaning of the pyramid on the back of one dollar bills. They are themselves aliens, and are killed by the family by tricking them into eating shrunk care tires that expand to their original size shortly afterwards.
Being Human: Appears to have 'men in grey' who work to keep the supernatural a secret.
In one episode of Bones, Hodgins calls in a false criminal report to ensure that a suspect, who is protected by Diplomatic Impunity, is detained at the airport long enough for the FBI to arrive. At the end of the episode, he is seen being led away by men in black suits for interrogation. Being Hodgins, he is ecstatic.
Star Trek: Voyager. The alien MIB version turns up in the episode "Bride of Chaotica!" when two photonic aliens appear on the holodeck program The Adventures of Captain Proton, dressed as grey-suited men in fedoras. They speak in a stilted manner and though dressed like humans of the 1930's are unfamiliar with their society, mistaking the holodeck characters for Energy Beings like themselves and assuming the Large Ham supervillains they encounter are a genuine threat.
The NID is this in Stargate SG-1 in both a negative and positive version of this. Early seasons featured sinister NID agents subverting Stargate Command policy for their own ends; later on, honest and righteous NID agents are introduced, whose main job becomes hunting down their corrupt counterparts from the earlier season.
Agent Terrence Meyers in Murdoch Mysteries has some MIB elements, especially in his first appearance, the episode "The Annoying Red Planet", which is a UFO conspiracy story.
True to the sci-fi nature of their songs, Blue Oyster Cult has multiple instances of MIB in their songs. Most noticeably in the song Take Me Away as well as its music video.
The "Agents of Fortune" mentioned in E.T.I. (and possibly depicted on the album cover) are a possible example.
The Stranglers have a very paranoid release called "The Gospel According to the Men in Black"
Frank Black's "Men In Black": The narrator anticipates a visit from the title figures because he has video proof of a UFO sighting he plans to give to the media. He also speculates on whether they're humans sent by the government or aliens in disguise ("Are they Grey or is it my own nation?").
Will Smith's theme songs to the films, "Men In Black" and "Nod Ya Head (Black Suits Coming)"
Running Wild's "Men in Black" from Masquerade album portrays them as villains for hiding the truth about aliens.
For a while in the summer/fall of 2010 Kanye West and his whole crew started using a smart tailored aesthetic that he called "Rosewood Movement", which had the side effect of making all of them look like Men in Black◊
MIB were a common enemy in Mage: The Ascension. The faction they belonged to, the New World Order convention of the Technocracy, also included Men in Grey (infiltrators, who rarely actually wore grey suits) and Men in White (who acted as internal police). It is noted that this is just one of many guises they have used throughout the centuries.
The nWoD has the Men in Black, mysterious entities from beyond who show up in pristine suits, don't quite act human, go by names like "Mr. Door" and "Agent Clock" and act to "neutralize" any individual who's had an encounter with the supernatural. And if you admit that you are a supernatural being, they will either try to kill you, or attempt to perform a crude lobotomy with whatever tools happen to be available, to "cure" you of your condition.
In Hunter: The Vigil, there are three Hunter Compacts or Conspiracies, at least, who essentially fit under this archetype.
Firstly, there's the Conspiracy officially designated Task Force: VALKYRIE. They're a secret black ops group under the vague control of the US government, dedicated to fighting monsters. These differ from the standard MIBs in that they operate more like a paramilitary group or SWAT force than secret agents.
Then there's a Compact, Division Six, that thinks it's the Men in Black, but they're actually being used as a hitman squad by the Seers of the Throne from Mage: The Awakening. Division Six is a direct reference and possible Shout-Out to Men In Black, referring to the cover story ("(Name of Agency), Division Six") most often used by the MIB agents in the movies and especially in the animated series.
Ironically, the Compact known as Network Zero manages to cross this over with Agent Mulder. It's a loose organization of new media fans who seek out and document breaches in the supernaturals' veil of secrecy — however, one faction, known as the Secret Keepers, then actively covers up these breaches to ensure the rest of humanity doesn't figure it out. Their justification is that "obviously" the monsters are too well-entrenched in politics, the media, etcetera to face just yet; if Network Zero acts too soon, the monsters will tighten their procedures and become even harder to uproot. They want to wait and gather evidence until they have enough that they can blow the veil right off and force all of humanity to accept the truth about the monsters in their midst.
Also referenced directly in GURPS Illuminati, the Third Edition supplement about worlds based on conspiracy theory.
GURPS Warehouse 23, a companion piece to Illuminati, says that the Warehouse contains thousands of records of MIB sightings that the Secret Masters didn't authorise and don't understand.
In GURPS Technomancer, "Mages in Black" are part of the general lore around Seelie sightings and abductions (which may or may not actually happen).
Delta Green in the Call of Cthulhu RPG were the official Men in Black of the setting until a giant snafu in the Seventies that resulted in massive losses and the dismantling of the organization. Now it exists as a conspiracy within several government agencies, while their arch-rivals, the MAJESTIC conspiracy, have risen to the roost with an even less moral approach to skullduggery. At times the Delta Green setting gets positively crowded with sinister guys in sunglasses, all trying to intimidate each other.
The Imperial Inquisition of Warhammer 40,000 can be seen as an unusually well-developed version, which does seek to keep Imperial citizens as ignorant of Chaos (among other things) as possible, and they don't hesitate to silence those who have seen too much in a rather permanent fashion. Including entire planetary populations.
They don't exactly wear black, but they do have black spaceships.
Less "Men in Black" and more "Men in Silver Powered Armor", but the Grey Knights are an elite Space Marines chapter founded in secrecy after the Horus Heresy. All possessing psyker powers and consecrated weapons and armour, they're specially trained and equipped to deal with daemonic incursions of all kinds, and their existence is one of the most closely guarded secrets of the Imperium. If circumstances dictate they must fight alongside other Imperial forces, the secret is maintained by executing the allied forces when the fighting is over (in the case of the Imperial Guard and PDF) or applied Laser-Guided Amnesia (in the case of other Space Marines, or other forces who are too special to be simply "disposed of").
Deadlands features The Agency (an offshoot of the Pinkerton Detectives) and the Texas Rangers, organizations used by the United States and Confederate States respectively. Publicly, they are national law enforcement agents. Less well known to the public is that the two groups are employed to spy on the other group's government, but this itself is a cover for their real activities as Men and Women In Black (literally in The Agency's case; the Rangers wear gray), investigating and suppressing knowledge of the weirdness inherent to the game's setting.
Teenagers from Outer Space has its Alien Control Officers, who are supposed to keep the chaos caused by alien students to a minimum. Since they're equipped with black suits, black sunglasses, excessive ultra-tech firepower, and "All the tactical sense of a pithed hamster", this rarely works.
Bureau 13note Released in 1983, written by Nick Pollotta of Tri Tac Games. - Released long before MIB or X-Files. Players create agents of the titular government bureau and hunt down the things that go bump in the night and keep their existance secret from the nation at large. A classic setting combining supernatural horror with a touch of tongue in cheek comedy, the long awaited d20 version came out at Gen Con in 2008.
Many conspiracies in Over the Edge use people fitting in the description as their Mooks, but the Movers are probably the most eponymous, having presence in pretty much every government.
Paranoia has the Men in Infrared, whose black clothes let them hide among regular Infrareds (low-level grunts making up something like 80% to 90% of the population).
Dungeons & Dragons has the Keepers; mysterious, unnerving, and inhuman aberrations clad in black. They appear human at first glance, but closer inspection reveals the truth - their flesh is livid and rubbery, their joints bend in any direction, and if one removes the goggles or masks they wear, it becomes apparent that they have no eyes. As the name implies, they keep secrets. They seek out beings who know them - any kind of secret will do, as long as it is important on a large scale (or pertains to the keepers themselves). Then they appear, demanding silence and enforcing it in a tried and true manner.
Project Ozma in Eclipse Phase. It's even Lampshaded that they essentially break the laws of physics in this setting, since it's essentially impossible to keep secrets buried this deep without someone exposing them, but Ozma does it anyway. (Firewall, the contrasting Secret Organization, is less concerned about keeping secrets as such and more about simply ensuring that nothing becomes an existential risk to what's left of humankind.)
In Age of Aquarius, the Institute is this. In the first edition, the standard campaign was playing as them; in the second edition, they are one of several playable organisations. Subverted in that they are mostly plainclothes agents, but their intents and purpose are exactly this trope.
Hollow Earth Expedition. In the Secrets of the Surface World supplement, the Paranormal Investigator archetype works for the FBI's Special Investigations Unit. He investigates and deals with supernatural events and things and covers up the truth from the general public. He even has a Neuraliz... er, Amnesia Ray device.
Dark•Matter is positively crowded with these, being a Conspiracy Theory based game. Everyone from PC's working for the the more-or-less benevolent Hoffman Institute to agents of many governments, to represenatives of various other conspiracies all tend to take this look and behavior. There's also an alien race with distinctly inhuman features like six fingers that have their advance scouts on Earth using this guise as cover.
You're Welcome America: George W. Bush (as played by Will Ferrell) is "guarded" by a burly secret service agent who appears between acts. He eventually loosens up and dances to the interstitial music.
The otherwise nameless G Man from the Half-Life series. Not only is he Gordon Freeman's employer, but he is also his observer: Gordon occasionally glimpses him watching from a distance.
He takes on a more direct role in the expansion pack, Opposing Force, where he both helps and hinders Adrian Shephard and rearms a disarmed nuke meant to destroy Black Mesa.
According to himself, he has a fondness for people who know how to "survive".
The Elite Beat Agents from the Nintendo DS game of the same name are over-the-top caricatures of this trope. Unlike many other examples, the EBA are actually out to help people by literally channeling their dancing powers to help their targets succeed in their goals. Clad in sharp black suits, they seem to be vaguely part of some secret government organization and are lead by a guy named Commander Kahn.
Apparently, the MIB aesthetic was selected for its similarity to the stern, black-clad male cheerleaders used in the Japanese game Osu! Tatakae! Ouendan (of which Elite Beat Agents is an Americanized adaptation of), as well as the lead developer's love of The Blues Brothers.
In Realms of the Haunting they appear as a type of enemy, and one of the more dangerous ones, adept at firing guns and magical projectiles.
City of Heroes gives your character a "Man In Black" or "Woman In Black" badge for defeating 200 Shivans, enemies that are a combination of alien goo and human corpses that spawned from meteors. There is also the Crey faction (a mega-corporation), which has people in the same familiar attire and are assumed to have the roles of infiltrating and bullying other companies. And while the actual attire isn't in the MIB style, the Malta group has mostly the same role of silencing and subverting the general populace.
Men in Black and Women in Black are semi-common enemies in the video game Deus Ex. These individuals were Series P augmented agents (Physiopharmaceutical?) whose modifications had rendered them albino. To quote the game, "so far the simple addition of sunglasses and dark clothing appear to have resolved the matter in a practical fashion." Deus Ex was very fond of using tropes and memes to enforce Genre Blindness on the population in the game — it's remarkably easy to scoff at the idea of an MIB, whereas a towering albino with an automatic shotgun is so far off the conspiracy radar that people might actually start listening.
The game also used the conspiracy insistence than Men in Black had "electronic sounding voices".
Deus Ex: Human Revolution has more "conventional" Men in Black seen mostly in sidequests: agents of the conspiracy dressed in black suits with common sounding names as aliases (one of them slips up and almost says Hugh Darrow's real name before switching back to "Mr. Grey").
One level of Psychonauts, "The Milkman Conspiracy", is infested with shady-looking "G-Men" wearing flimsy disguises consisting of a single prop and unconvincing acting (Raz can use this to his advantage: "I am on the road crew. This is my stop sign.") If they catch Raz trespassing in their territory, they drag him off to a dark room and ask him prying questions like "Who are you working for?", "What is the purpose of the goggles?", and "Who is the Milkman?" before unceremoniously dumping him back where he started.
In Max Payne, the Big Bad's mooks all dress in fashionable business suits and shades, and are referred to by title only in the game's credits, which name them the 'Killer Suits'.
Final Fantasy VII has the Turks. Well, most of them fit the bill, except they use dark blue suits with zippers, and only Rude is obsessed with the sunglasses. Tseng, Elena and Cissnei doesn't use any and Reno settles for goggles. Reno and Rude are popular for being Punch Clock Villains, and it is implied that the others are mostly the same.
The online Flash RPG AdventureQuest has N.O.V.A. (The Network of Vesparian Agents) that work for the Devourer Uncreator The'Galin.
The Destroy All Humans! series of games about an alien invasion of Earth naturally feature these as enemies. In the first game, they belong to a secret US government organization known as Project MAJESTIC.
There is even one in Mega Man Battle Network, however this one doesn't wear all black. Instead he wears a black undershirt with a red vest on top of it. He appears three times over the course of the series, first in the first game where he is in ACDC Town on offical government business investigating WWW, when Lan messes in his undercover work, and then in the fifth game where he is tasked with the creation of a task force to stop Dr. Regal's evil plans.
This actually carries over to the task force as since they are under his leadership, they become Men in Black too. It also appears in the cartoon also as Lan and Chaud both become Men in Black in the second season.
Streets of Rage 3 has some, in the Japanese version they are named after metals (Silver, Gold, etc) and in the US release, have strange "Scottish" style names such as "Macleod." Of course, they are mooks, so they're all trying to kill you.
Evil Genius. The Investigator/Agent mooks from PATRIOT come without shades and in suits of various colors, but otherwise conforming to the MIB template. SABRE's equivalent MIGs may also count. The other defense organizations stick to a more military garb.
Agent Superball in Telltale's Sam & Max: Freelance Police games, the doorman of choice for shady organisations. In Chariot of the Dogs he is a classical, UFO-denying MIB, complete with weather-ballon quips and the ability to cause Laser-Guided Amnesia.
Men in Black show up in one mission of Grand Theft Auto: San Andreas. Their lines seem to imply that they're the aliens: "Carbon-based buffon!" and "You evolved from shrews!".
In Alpha Protocol, the agents in the CIA post in Rome wear outfits similar to the traditional MIB garb, though they're not actively hostile to Mike (except that he's intruding in their listening post). Also, there are Conrad Marburg's agents, Deus Vult, who often sport the sunglasses-and-suits look, though some of them prefer dark T-shirts and combat fatigues instead. The goggle-and-jumpsuit-clad G22 agents most accurately fit the role of MIB, but not the outfit.
Pokemon Black And White has Men in Black standing around the Unova reigion, their existence is unexplained, but they do give you items.
The gunmen type enemies in Streets of Rage 3 are all men in a black suit and tie with sunglasses and they use a gun as their main attack. They will also punch and throw you if you get too close to them.
Genya Arikado from the Castlevania series. He's got the suit, personality, and he belongs to a secret Japanese government agency that deals with the paranormal.
The Thin Men of XCOM: Enemy Unknown are alien infiltrators who look like this, in a Slender Man Mythos sort of way. Meanwhile, XCOM themselves are the actual international crack-squad/specialist force responsible for taking out aliens and suppressing information about them. Part of the job is retrieving downed UFOs, apprehending abductees for debriefing and processing, deleting vital intel before someone gets to it or silencing suspected collaborators.
EXALT in Enemy Within are a variation on the visual theme, being decked out in "business casual" clothing (pinstripe pants, white shirts and ties) with some face concealing bandannas for identity concealment. This is meant to convey the idea that EXALT agents are embedded in regular society and work normal day jobs yet ready to move out and engage XCOM at a moment's notice.
While they don't wear suits, this is essentially the role of the Spectres in Mass Effect. The Council gives them the paralegal authority to act above the law and take action as they see fit. Naturally, most of the files relating to them are highly classified.
The Shikaree or Sin Hunters are a fantasy version of this to the Mithra nations in Final Fantasy XI, hunting down those who committed crimes against the Nations. The ones seen in the Chains of Promathia come across as a group of Inspector Javerts, but this is partially subverted in the Ranger quest storyline wherein they are more concerned about the retrieval or destruction of the Artifact of Doom that the criminal stole than the actual criminal, although the player doesn't find this out till the final Artifact Armor quest.
Fans! had its Fantasmagorical Integration Board, or FIB, whose theoretical purpose was the defense of the world from destructive forces. Initially antagonists, then untrusted allies, then antagonists again, then... and so on. Largely a sort of over-arching sendup of this concept and all related ones. Most notably, "Miller" and "Sully" were agents, and "The XYZ-Files" was a way for them to cover their tracks using fiction. They were semi-sympathetic, which was exactly what their "first" leader wanted. It's easier to get away with things when they like you.
In Gunnerkrigg Court, a Flash Back reveals that two rather benign Men in Black were responsible for Zimmy and Gamma's enrollment at the Court, apparently for the girls' own protection. Word Of Tom has since revealed that they were Court staff.
The Continentals is a steampunk murder, mystery, adventure featuring two "Continental Operatives" named Jeffrey Tiffen Smythe and Lady Fiona Fiziwigg who work for an official government agency that doesn't offically exist known as the A.T.S.T.K
The Inexplicable Adventures of Bob! has Agent Ben and Agent Jerry. Initially just a pair of FBI agents who had the bad luck to be stuck with the task of investigating Bob, they have since been officially promoted to the status of a "paranormal taskforce", and now get undesirable jobs like investigating "Fish People reports" in Innsmouth. Jerry blames Bob for this development in his career.
Mr. Verres, Tedd's Dad, is a high ranking offical in a similar organization in El Goonish Shive.
In a recent comic, a bit of (relative)realism was injected into the situation, after Mr. Verres became personally involved, and nearly killed a wizard who was attacking his niece:
Director: Edward, your supernatural and extraterrestrial connections make you invaluable, but I have suspected for a while now that you have too much of a personal connection to much of what happens around here. Your loss of control today confirms it. As of this moment, you are no longer head of the paranormal division, and will not take part in investigations. Mr. Verres: You're firing me?! Director: Oh no, nothing of the sort. You have too may important friends who would raise hell, myself included. No, I'm doing the best thing I can do for everyone, Ed. I'm promoting you to head of Paranormal Diplomacy. Mr. Verres: There is no such position. Director:There is now.
Although Mr. Verres seems to be extremely well suite to the position.
The Walkyverse has exactly one MIB. He's an agent and an alien in disguise.
Times Like This has Agent Scott, who's actually with the FBI's Paranormal Case Department. His division is charged with not letting time travel get out of control. His dwarf status makes it easier for him to disguise himself as everyday objects or small animals. And he has his own neuralyzer too.
In Elf Blood, King, the leader of the secretive paramilitary government-sanctioned magitek-wielding unethically-experimenting Council, naturally favours a dark grey suit and a dark burgundy tie.
All the members of Trying Human's Majestic 12 fit very well, following the dress code (except for 3, who wears a white suit) and being an organization totally dedicated to dealing with alien activity on Earth. Unlike most examples of this trope, a good number of Majic agents are female.
The unnamed agency in charge of dealing with aliens in Alien Dice seems to have relaxed the dress code and is actually pretty reasonable, especially compared to one of the author's other series...
The Cyantian Chronicles, whose AMIB aggressively hunts down any aliens, humans modified by captured alien tech, and humans who've met aliens. Made even worse by the fact that the Cyantians actually want to help humanity. Fortunately some other countries' versions of the MIB are suggested to be more reasonable, particularly the JMIB with whom the Cyantians are preparing for formal First Contact.
Such a group is said to exist in Wapsi Square although they have never been seen, only talked about. They seem to be very reasonable, although they seem to have let the protagonists deal with most of the supernatural problems.
Present by implication in The End. Some governing body is apparently aware of and monitors alien activity on earth, and has composed a series of files on the main characters who were taken off planet at a sci fi convention, but no organization members have made an appearance thus far.
In Axe Cop, when Uni-Baby gets thrown down to Earth from space, for some reason everyone thinks she's an alien (which is technically true) and that someone should fight her. A group of men in black, possibly the Alien Police, show up pointing guns at her, but Axe Cop happens to be driving by and saves her, chopping all their heads off when they refuse to listen to reason.
In Autumn Bay, men in back suits stifle Intrepid Reporter Felicia Kingsley's investigation into the fallen star, even as people in hazmat suits work in the background.
Sluggy Freelance: In "Aylee", when some government agents have been killed and Sharon Gall tries to inquire about what's happened, she's told to forget and not to talk to anyone about it by a couple of men in black representing the government, who want to keep the whole thing internal due to the sensitive positions the victims worked in. She tells one of them sarcastically that he was cooler in The Matrix than in person.
The SCP Foundation. Its documents even specifically mention using a "standard 'Man in Black' concealment pattern" to retrieve SCPs from the UIU.
The Protectors of the Plot Continuum wear black uniforms and use neuralyzers (or Obliviate spells, or memory-erasing drugs, or...) to make canon characters forget that bad fan fiction ever happened. Oh, and they often assassinate Mary Sues, too.
In the Whateley Universe, these are likely to be members of the Mutant Commission Office, whose international task is to monitor mutants and be prepared to handle mutant threats. Since the protagonists are all mutants at the Super Hero School Whateley Academy, this is not a good thing.
Anonymous likes to present itself as a Man In Black with no Man inside the suit. Because they don't exist.
They have a question sign in place of a head. It leads to a different interpretation - they exist, but you do not know who is Anonymous.
The main character of The Slender Man Mythos is an odd case: while he's a Humanoid Abomination and in some interpretations an utter monster, he bears a surprising similarity to the men in black: a sharp suit, the ability to rearrange memories of oddity, and the interest in those who know things which should not be known.
Played with in Welcome to Night Vale with the Vague, Yet Menacing Government Agency. Unlike most 'Man in Black' agencies, they hold a recruitment drive at one point. Initially, Cecil calls it A Vague, Yet Menacing Government Agency, which left it somewhat ambiguous whether the Agents of a Vague, Yet Menacing Government Agency that show up occasionally are always from the same group each time or several different Vague Yet Menacing Government Agencies. As the series goes on, Cecil starts calling it The Vague, Yet Menacing Government Agency, so it could be assumed that it's the same organization.
Johnny Test spoofs this: a pair of bumbling Men in Black are recurring characters who constantly fail to save the day.
The Kim Possible episode "Rufus vs. Commodore Puddles" centers around Area 51. Kim's ride for the mission are a pair of Men in Black named "Agent Smith" and "Agent Smith". Kim's usual formulaic response to their "don't mention it" line, to humbly recount how simple it was to help them in the past, is interrupted by, "No, really! Don't mention it."
There's also SECT, headed by Lieutenant Steel. They handle alien threats as well, but seem a lot less efficacious and less well-informed than the Plumbers (Also don't seem to be a secret from the public).
What do you mean, top secret? Everyone knows about them because they won't shut up about it!
The Transformers mythos has several different takes on the concept in various segments of the mythos, as befits a franchise that often has an Alien Among Us story.
Sector Seven from the live-action movie and associated side-stories. We could tell you more, but A, that would be spoilers and B, we'd have to kill you. This site has no budget, and assassins are expensive. Save us the trouble.
Colonel Franklin, from Transformers Cybertron, and his people seem like bad guys at first, but Franklin turns out to be a good guy at heart. The reason he was so eagerly looking for the Transformers? When Colonel Franklin was just a young boy, a mysterious and otherworldly figure saved his life. That figure, it turns out, is none other than the Autobot hero Evac, and their reunion goes pretty nicely.
Code Lyoko also has its Men In Black, seen mostly in flashbacks relative to Franz Hopper and Project Carthage. Two secret agents appears in episode "False Lead" but don't seem to linked to the other MIB. Parodied when they confess that they are so secret, even the president don't know they exist, and they are not so sure who they are working for. But school directors are allowed to know what even the president must not.
The Fairly Oddparents has MERF, the Military Extraterrestrial Response Force, whose purpose it to protect Earth from otherwordly threats. Considering that Adults Are Useless on this show, you can guess how well that works out.
Jackie Chan Adventures has Section 13, and while they are outclassed by the magic Jackie usually fights, they are good at transportation, are very good against technology-based threats, and have been known to slow the bad guys down long enough for Jackie and Co. to conjure up the spell needed to win. They are a very rare heroic example.
The Venture Bros. has Cardholder and Doe, a pair of "exterminators" sent by [OSI] to deal with Jonas Jr.'s "butterfly problem". Another episode has an entire squad of Men in Black being ominously briefed for a mission, that turns out to be working security for Dr. Venture's yard sale.
The Doctor Who animation "Dreamland", set in Area 51, introduces Men In Black early on. They eventually turn out to be robotic agents of the Alliance of Shades, named Mr. Dread, Mr. Fear, Mr. Terror and Mr. Apprehension.
The S.U.M.A. (Shut Up and Move Along) agents from the Class of 3000 episode "Brotha from the Third Rock". Competence optional.
The Swollen Eyeball Network - a group of conspiracy theorists who communicate mostly via webcam (in silhouette with red eyes). Dib is a member, and they're one of the few groups that doesn't outright dismiss him. Most of the time.
Bill - dresses like an actual MIB, but dismisses the idea of creatures like aliens and bigfoot, choosing to believe in theories like Count Cocofang being a real vampire.
Zim once has GIR explicitly pose as a government agent to rescue him from some UFO nuts.
The first episode of Gravity Falls' second season begins with such agents coming to town. The episode's events convince them that there's definitely something going on.
Based on the secretive government agents of the Cold War era, following the President's every footstep and whispering coded security updates at every turn.
J. Edgar Hoover revamped the popular image of law enforcement from a corrupt, overweight, bumbling brute wielding a blood-spattered nightstick to a handsome, tommy gun-toting, college-educated nemesis of America's Public Enemy No. 1. This public relations campaign gave rise to the "G-man" as a forerunning to the MIB — see the Film section above.
Apparently, the standard MIB get-up has become something of an Ascended Meme where the Secret Service and similar government agents are concerned, though it's possible and in fact fairly likely that the guys in the sharp suits are mostly there as decoys and an equal or greater number are wearing plainclothes.
In the British civil service they have been known as "boxers" as according to the mythology the only address they give for their department is always a PO box. Box 500 and Box 850 are the most well known.
Part of the culture of 'Geek Squad' is a parody on this. Employees refer to themselves as 'Agent [last name or sometimes first name]', wear a uniform designed to be a nerdy version of a secret service agent's uniform, and are often portrayed as being 'super cereal' about what they're doing in both commercials and training videos. Of course, many tech illiterate people find some agents to be overbearing, dressed to kill, speaking an incomprehensible code language to mask the simplicity of their operations, and specially trained by experts to deal in matters too arcane for the normal mind to comprehend, so the parody practically writes itself.
The Securitate was Romania's attempt at The Men in Black during the communist era. This is more of a subversion though, since most of them were nothing more than common street muscle and bar thugs, dressed in black suits.
The term is also used tongue-in-cheek to refer to "Revenue Protection Officers" on UK railways, the people who check tickets and issue fines for evasion. They are almost universally seen in pairs, wearing long black coats (more following the "bouncer" image than a Man in Black proper) and acting like the High Lords of the Universe.
In 1943 an American ship in a harbor was hit. The local hospital was flooded with casualties with symptoms no one recognized. While the hospital staff was working a couple of men in black walked in, swore the staff to secrecy, and told them that the ship that had been hit had contained a large supply of Mustard Gas that had been shipped to the front, "just in case". Then The Men in Black walked out.
Unfortunately for the real soldiers stationed at the port of Bari (Italy) that day. No men in black showed up, and at least 100 Americans, British and Italians died of mustard gas poisoning. A bit of silver lining from this story is that the autoposy reports of these dead soldiers was what inspired the invention of chemotherapy as a treatment for cancer.
Bouncers and other high class security people the world over abuse this trope to the hilt, simply because it looks badass and intimidating to anyone thinking of starting trouble (which is half the point of security staff). Occasionally leads to the fridge logic of bouncers at nightclubs wearing sunglasses.