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It's so simple, yet so complex. It's the perfect Fighting Game formula! HUEHEHEHEHEHEHE!
If you're looking for the character called "Mugen", look here: Samurai Champloo

"Victory means nothing when we're fighting everything."
Mondegreen of Loading screen in "Infinity Mugen Tournament" premade skin

"Mugen" is Japanese for "infinity". M.U.G.E.N, however, is a freeware 2D fighting game engine designed by Elecbyte, written in C with the Allegro library and originally released in July 1999. Beta versions of the engine were made to work on DOS, Linux, and Windows platforms, all of which were distributed through their website.

At its core, the M.U.G.E.N engine allows users to import created characters, background stages, and other game objects through interpreted text files, graphics, and sound compilations to create a functional fighting game similar to commercial games produced by Capcom or SNK. While the engine is set up primarily for fighting game development, developers have used it for several other game types (including shooter and platform style games). Elecbyte officially claims to have forgotten what the acronym M.U.G.E.N stood for, but the readme documentation says its meaning referred to the days when the engine was meant to emulate shooting games instead of fighting games.


The engine allows anyone with the resources to create and import characters, background stages and other game objects. It even supports various types of audio formats (mainly MP3 and MIDI, although it can be configured to play various audio formats via Winamp plugins) so that players can have a soundtrack. Since M.U.G.E.N allows for most of the same types of functionality found in most commercial 2D fighting games, players can basically recreate any of those games' characters and gameplay—which is where the real appeal of the engine lies.

A vast majority of the first wave of M.U.G.E.N sites have either not been updated since 2010 or have been shut down. Because of this, finding certain characters that have become infamous within the M.U.G.E.N community is a near-impossibility.


DOS and Linux versions

First released on the 17th of July 1999, M.U.G.E.N was initially created for MS-DOS. Development of the DOS version ceased when Elecbyte switched to the Linux platform in November 2001. For a time, Elecbyte had a running request for donations on their site to legally obtain a Windows compiler so they could make a Windows version of M.U.G.E.N. The development group discontinued this project in 2003 and shut down their site. Speculation has since pointed at leaks made public of a private Windows-based M.U.G.E.N beta that was provided to donators.

Windows version and subsequent hacks

The private WinM.U.G.E.N beta contained a two-character roster limit, locked game modes, and nag screens. With the beta leaked and Elecbyte gone, a "no limit" hack that removed most of these limitations was made available in 2004 by Rou Hei, followed by subsequent updates to deal with bugs and other issues. This version of M.U.G.E.N is functionally the same as the last Linux release, though with subtle differences and unique issues (mostly revolving around proper music and music plugin support). Due to the changes between the DOS and Linux versions of M.U.G.E.N, many older characters required at least the SFF files to be modified so the engine could display palettes correctly (notably on portraits). This version also had some changes in how certain CNS script controllers functioned, which caused some minor upset amongst the community. Those that could still run the DOS version in some form stayed with that version and even offered DOS patches to downgrade characters for compatibility with the older version.

In May 2007, a hacked version of WinM.U.G.E.N was released by a third party; this hack added support for high-resolution stages (such as those seen in Guilty Gear X) at the cost of losing support for standard resolution M.U.G.E.N stages. Later that month, another hack was done to add support for high-res select screens. In July 2007, another hack—this one created by Sion and Kung Fu Man, based on the last high-res hack—allowed for only the select screen to be high-res, not the stages. In December 2007, a hack from an anonymous source allowed both low-res and hi-res stages in the same build, with only a single line of code necessary for the hi-res stage support.

Elecbyte's website and the return of the M.U.G.E.N engine

In mid-2007, Elecbyte's site returned, though not without some controversy as to its legitimacy, as it only showed a single logo with Google ads on the side. On the 26th of July, a FAQ was added to the site, which claimed that Elecbyte would release a fixed version of WinM.U.G.E.N before major format changes in the next version. Those formatting changes would supposedly remove compatibility in regards to older works: "Do not expect old characters to work. At all."

Despite some widespread agreement in the M.U.G.E.N community that the new site was a fake, things changed around two years later when a new release candidate, MUGEN 1.0, was added to the site. The 1.0 version offered Open GL support as well as proper HD display options, victory quotes, and improved stability as a whole. The supposed widespread incompatibility of older works was never a problem; Elecbyte took steps to ensure that properly-coded characters would not malfunction in the new engine (or would require minimal updates), though screenpacks were not necessarily subject to the same rule. MUGEN 1.0 left the "Release Candidate" stage in January 2011; MUGEN 1.1 was eventually released in August 2013. There have been no updates to the engine since then.

Clone projects

When development of the WinM.U.G.E.N engine stopped, several clone projects started to try duplicating the engine's functionality from scratch. These projects include ShugenDo, InfinityCat, xnaMugen, and Open Source Mugen. Some of these alternatives presented online gameplay capabilities, a feature many users wanted for years. M.U.G.E.N clones currently in development include IKEMEN and Paintown.

For more information, check out these websites:

  • Elecbyte's website. Note that Elecbyte's Website now returns a 403 Forbidden error (confirmed as of the 22nd of April 2017).
  • The Mugen Fighters Guild - This is the starting point for many M.U.G.E.N players. If you are using M.U.G.E.N for the first time, this should be your first stop.
  • Random Select - This site houses a huge database for characters and stages as well as the BIJIN engine, an offshoot of the M.U.G.E.N clone IKEMEN.
  • Trinity Mugen - Created by Vans, Jesuszilla, and Fusion around 2005, the site is pretty much what its name suggests. It is the home of many a worthwhile M.U.G.E.N character, and it will even provide hosting services if necessary. The forum does not see much activity, as most of the action is at the IRC chat.
  • - This is one of the larger databases of M.U.G.E.N characters available today, with just about every character ever made (including some that are otherwise all but impossible to find at all). That also means it has just about every character ever made. Additionally, it hosts its own copies of everything, which annoys no small part of the community; CTRL+F "Warehousing" below.
  • The MUGEN Archive - This is probably the largest M.U.G.E.N database in existence, bigger than even mugencharacters. Like mugencharacters, MUGEN Archive had a lot to do with Warehousing, but in recent years it has redeemed itself by setting up its own forum where creators can upload their own characters, characters and stages that have been offline for years, and works from offline or retired creators.
  • - This is a Japanese M.U.G.E.N blog with a character/stage entry added nearly everyday. It only links content to their original downloads. A translator tool is required for most users. Outdated since 2015.
  • SaltyBet - SaltyBet is like betting on boxing or MMA fights…but instead of betting on when Mike Tyson is going to knock someone out, you get to bet on who would win in fights involving magicians who beat you up with dolls and lasers (sometimes both), Superman, robot ninjas and undead ninjas who brutally murder their opponent, crossdressing nuns, princess vampires, robot animals, killer mecha, a children's mascot with an assault rifle, a fat pink demon, human aliens, and fancy golden-haired aliens who spew poorly-ripped, badly-acted Spanish. (Oh, and Mike Tyson.) SaltyBet uses a modified M.U.G.E.N setup to play a continuous stream of randomised matches picked from a roster of literally several thousand characters, and visitors to the site can register to bet on who will win a given match. The money used to bet on these matches is not real, but the salt produced by these fights sure as hell is. The site also features a pay-(real-money-)for premium service—the Illuminati—that allows bettors to access the site's Compendium, which contains character statistics and matchup odds that can help them make better bets. Check out the site's FAQ for more information, and remember: Always never bet on DBZ...sometimes.
    • SpriteClub - SpriteClub can be considered a free offshoot of SaltyBet that is arguably better features-wise in a number of ways. The website provides the ability for viewers to submit any of their characters, stages, and music tracks for addition in monthly engine updates. SpriteClub also gives users access to view individual character/stage/playlist statistics, a page to create live customized exhibition matches, and the ability to host up to 4v4 rotation battles. SpriteClub has a much smaller user base than SaltyBet, but is considered to be more transparent and open for M.U.G.E.N content creators.
  • MUGEN Database - This database, which runs on a Wikia template, is one of the more up-to-date websites; it focuses on archiving and providing sources for characters and stages.
  • Mugen Free For All - This is another community that focuses on archiving materials for the engine, providing detailed directories of characters and stages that are kept as up-to-date as possible. The members of this group are adept at finding those hard-to-find creations that no one else can, and unlike most archive sites, it is also home to a group of creators and their own original creations.

For the sake of keeping this article from becoming another list of character tropes, please avoid adding entries for characters which are not exclusive to M.U.G.E.N, as tropes associated with pre-existing characters from other media can have theirs listed in the appropriate areas.

M.U.G.E.N-based games with their own pages:

The M.U.G.E.N engine, its community, and even some games made with the engine include the following tropes:

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  • Action Bomb:
    • Alphys can summon Mettaton NEO, who explodes and damages enemies when hit.
    • The Creeper is a playable character whose sole ability is to explode on the opponent for extremely massive, often One-Hit Kill damage. If that fails to kill the opponent, it loses.
    • The A-Bomb is a Lethal Joke Character that's an atomic bomb. Its sole attack nukes the entire screen for an unblockable unavoidable One-Hit Kill, and unlike the Creeper it can use this without dying. That said, several characters are able to survive and even beat it.
    • That Guy can explode at any time (Even when being comboed), though it's Cast from Hit Points.
  • Action Initiative: Like most Fighting Games, attack priority returns as a mechanic, and it's possible to code attacks with higher or lower priority (or even inifnite priority such as an Invulnerable Attack).
  • Action Politician: Senator Lieberman.
  • Adaptational Badass: Pingu, Garfield, Homer Simpson, Princess general, any character who was a non-combatant in their original source material can throw down like never before in M.U.G.E.N.
  • Aerith and Bob: When you have a crossover between as many games as can be imagined (and original characters), this is going to happen.
  • A.I. Breaker:
    • Some types of characters (e.g., mob-type characters, massive boss characters) have a tendency to confuse AI-controlled characters.
    • One Kung Fu Man edit, AK Man (short for A.I. Killer Man), invokes this trope by completely shutting off opponent AI and leaving them helpless. There are still a few characters that can beat him, though.
  • Amazing Technicolor Battlefield: When projectiles, clothing, and the background tend to be all the colors of the rainbow, this is bound to happen. Even drab urban settings or grim Mortal Kombat stages can get colorful real quick.
  • Amazing Technicolor Population: With custom palettes, this is possible for just about anyone. The character literally named "Ms. Fanservice" (actually a joke edit of Yoko) has blue, dark blue, red, and gray-skinned schemes. This does not even get into the characters who are already technicolor, or extremely broken characters such as the infamous "retarded" Peter Griffin (who has a new color scheme for just about every sprite thanks to a lack of any loaded palettes).
  • Anachronism Stew: When you have characters from fighting games that take place during different time eras, this happens.
  • Anthropomorphic Food: The Dancing Banana, a dancing banana with arms and legs, is also a surprisingly dangerous fighter.
  • April Fools' Day: There is a tradition in the M.U.G.E.N community about releasing Joke Characters on this day to fool players. Many such charactrs are surprise characters that people do not expect, while others that are supposed WIPs are fake, and and a few only make the release post in forums but have no download. Most of these releases (the real ones, anyway) are available for this day only, then they aren't. At Mugen Free For All, there is a compilation with some of the few AF chars that were ever saved.
  • Artificial Stupidity:
    • Several characters lack an AI, which makes them use the MUGEN Engine's AI. This consists of them using random moves and attacks for the most part, which usually tends to be ineffective compared to a custom made AI.
    • Many characters, even those with perfect AI, can break when fighting mob-type opponents such as the Alien Queen's xenomorph swarm, the Biohazard, and the Mad Gear Gang. Many AIs also don't avoid (or try to guard) the Stupid Little Drill Tank's unblockable drill, taking huge damage in the process.
  • Assist Character:
    • Some characters have built-in assist characters (usually referred as Strikers, the name for such characters in The King of Fighters). Some have them because they had them in their source game, but the majority of characters with built-in Strikers have them because of the M.U.G.E.N engine's limitations.
    • The Uno Tag System lets you do this with many characters.
  • Attack of the 50-Foot Whatever:
    • This is doable in the vein of Apocalypse from X-Men vs. Street Fighter, so long as there is a proper application of art and hitboxes. This is bizarrely averted with Godzilla and Gundam fighting characters, though there are some stages that allow you to do this (with, strangely enough, Godzilla and Gundam stages). The same goes for Evangelion and Primal Rage characters.
    • It is possible to edit the .def file of literally any character you have, and most of them have a "scale" option. This can result in you beefing up the size, and therefore hitboxes and attacks, of anyone. A fifty-foot-tall Ryu from Street Fighter who is so tall that he is going off screen? Par for the course in M.U.G.E.N.
  • Author Appeal: Of course.
  • Background Music Override: It's entirely possible to have a character play a music track that replaces the stage's normal music (Provided it has any). Examples include RicePigeon's Yuuka Kazami during her Original Master Spark super, Luka Megurine during her various super moves, and Evil Spirit Incarnate/The Scyther has this for the entire fight.
  • Back Stab: Literally for The_None's Segalow, who has a Level 3 Super where he grabs at the opponent and, if successful with the grab, stabs them. If this is done when the opponent is facing him, it does moderate damage...but if it connects from behind, it does massive damage. Segalow does have elements of The Spy, after all.
  • Badass Adorable: Ranging from moeblobs of various anime (Haruhi and Konata were massively popular in their heyday) to, of course, ponies from My Little Pony: Friendship Is Magic.
    • Special mention goes to Derpy Hooves' Quick Draw attack with various guns, including a BFG! Behold!
  • Badass Normal: Anyone who does not throw fireballs/shoot lasers/mutate/use magic can beat up homocidal robots, killer aliens from outer space, evil psychic projections made from two mutants that happens to be bigger than a skyscraper, actual Gods, and Mike Tyson. Kung Fu Man is one of the normals, since he does not have a single projectile attack, although he does have inexplicable Double Jumping ability.
  • Bait-and-Switch Boss:
    • Gay Bahamut/Primeus was originally released under the cover of "SSB Yukari".
    • Later, Suwako's Hat was released as Suwako_RP.
  • Battle Aura: This is common when characters power up and/or use Heat / Blood Heat.
  • Bee Afraid: Someone created a character based on a wasp nest. It just sits there until someone attacks it, at which point it releases a swarm of wasps to overwhelm the enemy, most of the time combo-locking them in place. Not even Juggernaut or The Incredible Hulk are a match for the stinging bastards.
  • Beyond the Impossible: There are characters who can win a match before the match even starts, something that never occurs in any other Fighting Game. It is also a literal breaking of the game's rules, in the sense that their code overloads the game to the point where the opponent fails to load and is thus defeated.
  • Bloody Murder:
    • Giygas' fatalities are jacked from Eternal Champion's Overkills—but they are somehow much more scary, even though they are relatively untouched straight rips.
    • Noroko can shoot blood forward.
    • Zero is here too.
  • Boss Rush: The NES Ninja Gaiden bosses have been made into a boss rush of its own.
  • Break Meter: Some characters have this. For example, Evil Kung Fu Man will get dizzy if hit enough times in short order, rendering him vulnerable.
  • Bruce Lee Clone: Bruce Lee himself is in there.
  • Calling Your Attacks: When Garfield fires hot dogs, he says "Hot dog" in a Dull Surprise voice with each one he fires. Not to also mention Ryu, Morrigan, and the other characters that involve this trope.
  • Cast from Hit Points: Homer Simpson's "Riot of The Beer" mode. It makes all of his attacks much stronger, and gives them greater priority, but using it costs half of his remaining health.
  • Chainsaw Good:
    • Sadako look-alike and general horror movie tribute character, Ella. Duke Nukem has a special palette that gives him the Doomguy's chainsaw (after he blows up Doomguy and steals it).
    • Evil Kung Fu Man's foot turns into a chainsaw.
  • Character Tiers: This is generally impossible due to Loads and Loads of Characters and the varying quality thereof, since analyzing them and their match-ups would take years. Some have tried to do this by separating cheap characters from normal ones, but there is no official tier list outside of a full M.U.G.E.N game.
    • SaltyBet uses a form of tiers in its custom system. Characters who are excessively strong (read: cheap as all hell) get pushed into X-Tier by default. All other tiers are decided by a character's winning record; if a character wins or loses enough matches in a row, they are either promoted (up to S-Tier) or demoted (as low as P-Tier). This tier system does not prevent overly unfair matchups (or system crashes), but it generally produces better random fights than if characters were left to fight each other willy-nilly. The tier system is thrown out for Exhibitions, where players can request fights between characters from different tiers.
  • Chekhov's Gunman: A meta-example. Anyone and anything encountered outside of M.U.G.E.N has a good chance of eventually being adapted to it.
  • Combos: Combo attacks are extremely common among characters, given that it's a Fighting Game engine. There's an in-built code to make your attacks stop comboing once the hit counter gets high enough, in order to prevent infinite combos.
  • Composite Character: Segalow is a weird fusion of Seth from Street Fighter IV, Rugal (uses his Capcom VS SNK sprites but with the moustache shaved off), and Lazlow (as one his voices is taken directly from Grand Theft Auto III, his lifebar portrait is Lazlow's Vice City artwork, and his flavor text on The_None's site is a direct transcript of some of Lazlow's dialogue from GTA III). He also has elements of Ray Park, who played both Rugal in the King of Fighters movie and Darth Maul; his big portrait is Movie!Rugal, and he has a Super Move involving a double-bladed lightsaber. He also has The Spy's Dead Ringer.
  • The Computer Is a Cheating Bastard:
    • One example is certain characters not requiring a minimum Super Bar level to do Super Moves when controlled by the AI, but requiring it when controlled by the player.
    • Omega and Shadow Omega have been programmed by the creator to purposely never use any of their meter when they are being fought as CPU opponents. This allows them to infinitely use Super-based attacks without ever draining meter. This leniency only affects the CPU; the player doesn't get the same privilege when controlling Omega.
  • Counter Attack:
    • Several characters have one of these, and this mechanic can even be implemented via the Reversal or HitOverride codes.
    • Just like in its source games, Wobbuffet can only attack via this method, and Counter/Mirror Coat only work against physical attacks and projectiles respectively.
    • Gustavo can only attack via this method by making homing unblockable fart clouds each time he's hit, the strength of which depend on how hard he was damaged.
  • Crossover: M.U.G.E.N is often used for this, although gameplay styles do not necessarily mix well. This is particularly true when characters from Guilty Gear, a game known for being much more notoriously fast-paced and complex than other fighting games (on top of having ludicrously cheap AI), are involved.

  • Damn You, Muscle Memory!: The possibility of a M.U.G.E.N build having characters from different source games (complete with distinctive control schemes of such) tends to confuse some players when they are getting to know or use new characters.
  • Death of a Thousand Cuts:
    • There are many characters whose attacks will hit the 999 combo meter. These are mainly characters that would fall under SaltyBet's X-Tier orSpriteClub's 2nd or 1st Division.
    • This is particularly funny in reverse when facing a weakly programmed AI, such as Alex Mercer, against a much stronger AI opponent such as Ika Musume, who will combo him to death for several minutes while he flails through the air helplessly.
  • Defeat Equals Explosion:
  • Decomposite Character: Sunset Shimmer's pony and human forms are separate characters.
  • Deconstruction Game: M.U.G.E.N can be seen as a deconstruction of crossover fighting games (as well as games with guest characters), as you can see the far more realistic consequences of having characters in your roster with widely different gameplay rules. Gaze in awe as characters from older games with simpler mechanics note  are mercilessly demolished by characters from modern, fast-paced, combo-oriented games note , or games with more complex mechanics note .
  • Decon-Recon Switch: Thanks to the customizability of the engine, you can rewrite the files and states of your characters for proper balancing.
  • Defeating the Undefeatable:
    • Over and over again. Chuck Norris, a literally invincible Lethal Joke Character based on Chuck Norris Facts. He actually has been defeated before. Before that? He maimed several undefeatable characters with the same hitbox-less advantage, such as the previous Oni-Miko. And people have been trying to one-up Oni-Miko and everyone else since.
    • Both Chuck Norris and Oni-Miko-Z (and countless other "unbeatable" characters) have fallen to the Debugger character, two floating strings of numbers that "delete" the opponent's root file, causing them to be read as nonexistent and dead.
    • Various creators have edited undefeated characters to be actually defeated. The most known case is Elque.
  • Dem Bones: Diablo Skeleton.
  • Depending on the Writer:
    • If about two or more makers share the characters they've converted, don't expect them to be both exactly the same.
    • Few makers also are quite creative in their takes on certain characters. A good example would be The_None's Possessed Heita, who has a mode that comes with Captain Falcon's moves and voice. (Influenced heavily with the works of 3ha, which are almost 2 in 1.)
  • Did You Just Punch Out Cthulhu?:
  • Digital Piracy Is Evil: In the M.U.G.E.N community, there are two forms of this:
    • The first one, "warehousing", involves the practice of hosting a character on a website without the creator's permission. In some M.U.G.E.N circles, this is regarded as a disrespectful and dishonest practice, while others have no concerns about it.
    • The second one, much more subject to ridicule, involves "spriteswapping"—a process where a "creator" takes another creator's character and replaces all of the original character's sprites with "new" sprites. In particularly bad cases, the spriteswap will retain the base creation's gameplay elements even if it does not match the spriteswap's playing style. In even worse cases, the creator fails to change every single sprites, which causes the character to briefly "flicker" back to the original one during certain frames. Many spriteswaps also tend to have jacked-up stats, making them cheap and over-powered, like so. Warner creations are infamous for doing this, especially his first characters like Homer (a spriteswap of CVS Iori Yagami).
    • This is subverted in the case of sprite-ripping characters from pre-existing games and using them in M.U.G.E.N. Capcom was asked about this in the early days of M.U.G.E.N's existence; the company stated that they consider it a form of fan art (so long as no one sells the characters, of course). Every other company seems to have followed Capcom's attitude, at least in spirit.
  • Distant Reaction Shot: Mega Mari's Finishing Move causes an explosion that can be seen from space.
    • Crazy Mukuro has a super move where he grabs his opponent, the screen goes white, and a skull-shaped explosion that can be seen from space occurs. It does less damage than you'd expect from an explosion of that magnitude, however. If he finishes his opponent with it, it's seemingly implied he died doing it, complete with a Sky Face .
  • Ditto Fighter:
    • There is a Ditto character available; it transforms into other Pokémon as its attacks.
    • Characters that are designed to be Ditto fighters, such as Unknown from Tekken, often end up with an attack style that is mostly a mishmash of attacks from other characters. This is due to the difficulty of a programmer actually creating a character that duplicates the moveset of another character.
    • Inverted with Dhalsims, whose "Yoga Evolution" Level 3 Super transforms the opponent into Dhalsim.
    • The MegaBrony's Queen Chrysalis turns into Mega Man, Proto Man, Tomahawk Man, Hard Man, Blade Man and Zero.
    • As Ditto, M.U.G.E.N versions of Yumeji Kurokochi can transform into other Samurai Shodown characters. Also, there is Cerenas' Siron.
  • Divergent Character Evolution: There's the occasional instance of a character starting out as a spriteswap of another character, only for other creators to take said character and heavily differentiate them from their original counterpart. Notable examples include Warner's (and later Judgespear's) Homer Simpson and Warner's Wario.
  • The Dog Bites Back: One of Dancing Banana's introductions has him kicking away Donkey Kong as he's not happy being DK's Trademark Favourite Food and all. Upon losing a match, Dancing Banana's death animation has Donkey Kong dropping in from above before proceeding to eat him.
  • Double Jump: Several characters including the default version of Kung Fu Man are able to use this. One can even set the number of air jumps that a character can do. Cue fighters hovering over the stage for a full minute and duking it out above the camera's view.
  • Dramatic Disappearing Display: Some characters have a code that hides the entire GUI (lifebars, victories, powerbars).
    • Also possible to do so manually through the debug keys- Hold Ctrl and press L, and the HUD will disappear.
  • Drop-In Nemesis: If Dancing Banana loses the match, Donkey Kong will suddenly drop in from above and eat him. Granted, the banana's in no shape to fight back or even move after losing the match.
  • Easter Egg: Some fighters have special entrances with other fighters, and sometimes special ending poses. Deadpool, for example, has special entrances with Iron Man, Captain America, Batman, Cyclops, The Juggernaut, Ghost Rider, and The Mighty Thor.
    • Thanks to the 1.0 update, winquotes also can be directed to certain fighters.
  • Eaten Alive:
    • The Killer Whale devours enemies. Prior to a nerfing, this was a One-Hit Kill, otherwise it chews on the opponent before spitting them out.
    • One of the Dopefish's attacks causes him to eat his opponent if successful.
    • There are vore characters and edits of existent characters with this, which is a NSFW fetish not allowed in various communities.
  • Edible Ammunition:
    • Dancing Banana fires large bananas of varying sizes as projectiles.
    • Garfield throws Hotdogs as projectiles.
    • Homer Simpson throws Donuts as projectiles and one of his specials is Hell Candy Bomb, a candy bar that stuns the opponent for a short time.
    • Spongebob throws Krabby Patties as projectiles.
    • Nev throws ice cream as a projectile.
    • Hotel Mario uses Toast. One of his specials is firing a stream of jpeg Toast at the enemy. Hotel Luigi uses Salami and Spaghetti, and his special is firing jpeg Spaghetti. They can also fire Instruction Books, Toasters, Pennies, and use a jpeg gun, but the most you will see in a match are the food ones.
    • King Harkinian is a projectile spammer that throws "Dinner".
    • And not to mention the Fast Food Mascots as Ronald McDonald and Colonel Sanders.
    • That Guy can throw bowls of cereal and dishes of lobster.
  • Epic Fail: Whenever Homer is involved, as of Vs Iori, who falls on his ass, to Goku, of which Homer poses as Goku, Super Saiyan and all...until he farts.

  • Gainaxing:
    • Despite not bouncing at all in the actual Street Fighter games, Warusaki3's Rainbow Mika does this.
    • There is also one of the trope namers for M.U.G.E.N: Kabao & Warusaki3's Yoko Littner from TTGL.
    • Mugen has an entire community dedicated to NSFW characters that are simply this in a nutshell, albeit typically nude.
  • Game-Breaking Bug: Certain matchups can lead to one character being unable to land a single point of damage on the opponent, both characters being unable to damage each other at all, or outright malfunctions in the engine, due to the different codes used with each character and/or sloppy coding.
  • Game Mod: There are various mods and tools that can alter the M.U.G.E.N engine. Two such examples:
    • The Uno Tag system allows characters to tag out with their partners.
    • There exists a Smash Bros. system for M.U.G.E.N. Now you can duke it out with your favorite fighters, Smash Bros. style!
  • Gender Flip: There's the infamous Midnight Bliss...
  • Glass Cannon:
  • A God Am I: Any "God" version of a character. This happens literally with the Primal Rage characters, who, uh, are gods.
  • Godwin's Law:
    • The "X-Form" of The_None's Skullman has a counter move in which he hits the opponent while being shaped like a swastika.
    • And yes, an Omega Adolf Hitler character exists. As well as an anime one, with sounds from Downfall
  • Gone Horribly Right: M.U.G.E.N is a meta example for the fighting game genre. Do you want an engine where every fictional character you ever knew and loved could fight each other? Now you have it. Unfortunately, this also results in many of those characters being cheap, poorly made, unfinished, not at all true to their original game, or any combination thereof. You also get horribly imbalanced fights between characters with different gameplay styles and engine rules.
  • Gorn: Several characters in the M.U.G.E.N roster, such as those from Mortal Kombat, have lots of gory ways to finish off opponents.
  • Green Hill Zone: Several people have even created the Trope Namer.
  • Green Thumb: Hashi mainly uses plants when attacking.
  • High-Pressure Blood: With Mortal Kombat and Samurai Shodown characters converted to the engine, this was bound to happen.
  • Hit Points: All characters have a HP bar which depletes when they're damaged. Certain characters however use this to show how many "lives" they have, such as the Shoot 'em Up ships (getting hit takes off one of their three "lives" by removing a third of their life bar) or army/swarm based characters (where each individual character getting killed removes part of the lifebar).
  • Hurricane Kick: It's quite common to see both canon and original characters with a spinning kick attack.
  • Immune to Flinching:
    • Super Armor, and its permanent Hyper Armor variant, prevents a character from flinching when hit. This can be coded onto a character via the HitOverride function.
    • Frost Man takes this trope Up to Eleven. He has Hyper Armor, and because he can't be flinched, he can tank hits and deliver numerous attacks that are hard to interrupt (though there are certain fighters that can stop him). He also cannot be grabbed or stunned. Frost Man can actually beat a few cheap AI characters and fighetrs who rely on spamming projectiles or multi-hit moves. He does slow down a bit if he is hit multiple times, though.
  • Improbable Weapon User:
    • Deadpool has a sheep with a cannon to its back in his special.
    • Garfield uses hot dogs as projectiles.
    • Pingu and Finn use snowballs as projectiles.
    • White Len has been known to attack with kittens.
    • Dancing Banana uses oversized bananas as projectiles.
    • SpongeBob uses bubbles and Krabby Patties as projectiles.
    • Princess Bubblegum uses beakers as projectiles that explode on impact when it hits the ground.
    • Sonic uses rings as projectiles.
    • Homer uses doughnuts as projectiles, along with the Hell Candy Bomb.
    • Peter uses beer bottles and his lit farts as projectiles.
    • Adam Admuson can use a Game Boy, a spiked ball (named Mr. Spickles), and a Neural Stunner as projectiles.
    • Daniel can use a Galaxian, Cirno, and the Barrel as projectiles.
    • Bob and Cartoon Guy can use rocket fists as projectiles.
    • Chaos beat Peter to the punch and uses a slow-moving, noxious cloud of fart.
    • Bridget uses modified yoyos.
    • Taz uses burps.
    • Chowder spits out fruit as projectiles.
    • Omega Tom Hanks attacks with posters of his movies and an exploding dog.
    • Hastur, an Orochi/Mizuchi edit which is a lethal joke character, fires projectiles of Mizuchi with certain attacks.
    • Hige can throw Igniz, Krizalid and Original Zero at his opponent.
    • Nev can throw ice cream cones.
    • Cyberbots R.A.D. attacks using his cannons, both with missiles, and simply punching the opponent with them. Given it's a giant Tank, this is pretty absurd and funny.
    • Calvin uses water balloons, a squirt gun, and his wagon.
    • Hugo Simpson releases his homemade Pigeon-Rat.
    • A number of characters by Brergrsart have some:
  • Improvised Weapon:
  • Indy Escape:
    • The Trope Namer boulder sequence has been created as a "boss" stage.
    • The Murder Wall from Kid Chameleon must be outrun as well.
  • Inevitable Tournament: Some M.U.G.E.N forums hold tournaments for fun. While most follow a standard format (usually 1 vs 1 or 4 vs 4), some have fun twists on the genre.
    • SaltyBet used to runs tournament on a weekly basis; it has since started running tournaments after every hundred Matchmaking matches. These tournaments are typically intra-tier tournaments involving B-, A-, and S-Tier fighters; viewers can bet on each match, and the viewer who has the highest total at tournament's end gets some extra Salty Bucks added to their take. A custom tourney can even be held once Salty determines whether any possible matchups will result in a crash or otherwise permanently-delayed tournament.
      • SpriteClub also holds them, with tourneys happening every 50 matches. Unlike SaltyBet, they can come in 2v2note , 1v2, 3v3, or 4v4, as well as in brackets of 8 ,16, 32 or 64, with or without double elimination. Tournaments can go by the Division system, Rating system, or be freenote .
  • "Instant Death" Radius:
    • Oni-Miko-Zero. Literally. Put her up against most regular characters and that character is dead even before the battle starts.
    • The "Debugger" character uses a code that somehow deletes the opponent's root state, causing them to be read as nonexistent and thus KO'ed before the round starts. So far, it can beat Oni-Miko Zero and Chuck Norris with no effort, and is possibly the cheapest character ever.
    • The latest versions of uber-cheap characters (known as "Postman" or "Secretary" characters) run an .exe that affects the game such that only characters with their name are allowed to win.
  • Interface Screw:
    • Multiple characters are able to disable certain buttons on their enemy's moveset.
    • Gramperson's W.D. Gaster is unique in that his stats can carry over through multiple matches on Arcade Mode. Fitting for somebody who has supposedly transcended reality. Heck, he can attack before the match even starts!
  • Intra-Franchise Crossover: Commonly seen here, in which you can make the roster as you like, so you can put the same character from different games in the same created fighting game you like. As example, you can put Ryu from Street Fighter II, Street Fighter Alpha, Marvel vs. Capcom series, SNK vs. Capcom: SVC Chaos, Capcom vs. SNK series and even Street Fighter I in the same roster and make them fight against each other.
  • Invulnerable Attack: Known as "Infinite Priority" here. A favorite of SNK Bosses, cheap characters, as well as "retarded" characters.

  • Jack-of-All-Stats: Amongst the examples we could list sits Kung Fu Man, the default character that comes with any downloaded copy of M.U.G.E.N (mostly as a coding example and a base for creating characters) and eventually became the mascot of the engine.
  • Joke Character: There are a good number of characters that are weak on purpose:
    • Beatdown characters like Sandbag do practically nothing but stand in one place and take damage from everything until they die.
    • Flappy Bird. He's a One-Hit-Point Wonder who dies if he touches the ground or gets hit, and his only method of damaging the opponent is to keep flying to get enough super meter to use his Limit Break. This causes the pipes from his game to appear like a scrolling level. While this is highly damaging, Flappy Bird also dies if he touches those, making him an extremely hard character to play as.
    • And then we have characters who are actual jokes, such as "Pots Styled Eltnum". At first, you might think this is an edit of Eltnum by creator Phantom Of The Server (aka P.O.T.S.). Then you realize it is Exactly What It Says on the Tin: a swarm of pots with Eltnum's face in the front of each.
  • The Juggernaut: While a great many characters fit this mold, The Duane exaggerates this. He can one-shot nearly any other M.U.G.E.N character and has an obscenely huge hurtbox inversely proportional to his hitbox. Even if you manage to hit him, good luck trying to do it again.
  • Jump Scare:
    • The_None's Giygas uses this extensively.
    • Certain edits of Ronald McDonald have actual screamers coded into them to throw the player off in the second round.
    • One of Trouble Man's winposes.
  • Kamehame Hadoken: What's a fighting game without it?
  • Kiai: Being a fighting game engine, there are plenty of examples. The most particularly notable one is the JoJo's Bizarre Adventure "WRYYYYYYYYYYYYYYYY!" (used when anybody uses the Steamroller or when Chuck Norris drops the sun on his enemy).
  • Kung-Fu Jesus: Yes, he is a M.U.G.E.N character. So are God and Satan (courtesy of Adult Swim's Bible Fight).
  • Lazy Artist: This is rather common, especially when new Shotoclones are involved. This is sometimes justified when creators use characters as bases for their distinctive creations (e.g., the majority of the MvC-styled Mega Man characters, which use Mega Man as a base).
  • Lethal Joke Character:
    • Rare Akuma, Chuck Norris, The Dopefish, Zeeky H. Bomb, Slot Machine, The_None's Sue Sakamoto (aided by Logan Keller providing blind fire), Neco-Arc...
    • Wobbuffet. Like its original source, its only form of damaging the enemy is via Counter Attack. However, the power of its counter against physical attacks increases if it takes a hit when swinging, making it able to kill otherwise-broken characters in one hit. And it gets leftovers and Shadow Tag as moves. Finally, it also gets Destiny Bond, which destroys the opponent instead should Wobbuffet get K.O.'d when the move is active.
    • There is also Rolento's Yoshi, whose movelist consists solely of the Hokuto Hyakuretsu Ken.
    • A certain take on Jam from Guilty Gear knocks the opposing character onto a bed and humps until their energy is drained, resulting in either a DKO or a victory.
    • The Killer Whale.
    • One of The_None's April Fools' Day releases, Noah, whose basic attacks—when low on health—would stamp you into the scene of Enter the Dragon to get promptly roundhouse kicked by Bruce Lee. No wonder The Nerd was right...
    • Gay Bahamut/Primeus, The God Of Retarded Characters by RicePigeon, most of whose attacks involve notoriously "retarded" characters.
    • Giygas/Ozma, created by fhqwhgads7 and supposedly inspired by Primeus, is an April-Fools'-joke-character-turned-boss. It is basically a gigantic floating jawbreaker that starts off with Giygas' attacks, then imitates various YouTube Poop characters as it loses health and layers.
    • Vans' Rock Howard, who has the voice of Urien and whose MAX2 super move destroys the universe, crashing your program in the process.
    • Omega Tiger Woods, who can and will soundly pummel almost any character he comes across as long as that character isn't another Omega Tiger Woods. Where does he get that Shrimp Bus from, anyway? He's intended to be an SNK Boss-type character... just bizarre.
    • Similarly, Omega Tom Hanks, who turns the fight into a game of Bullet Hell by sending DVD covers of his hit movies after you.
    • Someone made a version of Mario called "NES Mario". He can only attack by jumping on enemies and he dies in two hits (if you don't press the button to turn into Super Mario again at the expense of some of the lifebar). But one specific programming trick makes him lethal. Fighting game characters flinch when hit, and NES Mario does not. If you get a window of opportunity, you can just keep on stomping your foe and finish them off in less than a minute.
      • Speaking of Mario, someone remade the first level of Super Mario Bros. Your hilariously oversized character will still be one-shotted by Goomba and pits, especially if they have limited jump physics. That stage's creator also remade the first levels of Super Mario Land and Contra. While the Super Mario Land stage is easier, prepare for your character to die in one hit in the Contra stage.
    • Someone made a classic version of Pac-Man. All he can do is move across the stage and munch on whatever gets in his way—but that is all he needs to do. God help his opponent if Pac-Man eats a power pellet...
    • One of the characters used as a "cheapie-buster" in earlier times was the Metool, the Mascot Mook from Mega Man. It had half the attack and defense of a regular character (and died twice as fast), but it was short (making it hard to hit), it could spam a Spread Shot from afar, and it could use its signature helmet guard. Oh, and it could call forth a giant Metool that instantly squishes the oppponent.
    • Saggot, aka "Bootleg Sagat", is an edited Sagat that plays like he came from one of the infamous Street Fighter II bootlegs. This means a whole new level of Tiger Shot spam, ridiculous combo ability, and crashes galore. His theme from the first Street Fighter perpetually plays during his fights, overriding any other music, and his victory pose references the famous "Cornflakes" line from the Street Fighter cartoon.
      • Other Street Fighter bootleg characters that end up being dangerous include Koryu (heavy projectile spamming much like the infamous Koryu edition), BroKen (similar to Koryu), and Viga (whose moves can do serious damage).
    • Flame Hyenard. Just... Flame Hyenard. You WILL BURN! BURN! BURN TO THE GROUND! if you fight him.
    • Zeori and NMOri, two entries in TrinityMUGEN's "Iori contest".
    • The Space Invader. The "Lethal" part comes from the fact that his laser is a One-Hit Kill, and the "Joke" part comes from the fact that it dies in one hit.
    • Iea. He flies off screen and dies if he gets hit, including his own assists. However, he has a lethal sword attack and can summon falling blocks that can one-shot opponents.
    • Winnie the Pooh. Specifically, the one from Winnie the Pooh's Home Run Derby. His baseball bat normally does pathetic damage, but if you time the attack as soon as he glows, it offs 1/3 of the opponent's maximum health or so. And it can't be blocked.
    • "Ms. Fanservice," who seems like a heavy edit of Yoko who uses other Ms. Fanservices for her moves, and an entirely different moveset. It sounds like a run-of-the-mill gag character, and is overall tamer than most characters on this list, but she has extremely aggressive AI, able to take down many other characters who aren't outright cheap. Including the original Yoko she was based on, who isn't a cakewalk herself.
    • NES Megaman plays like the NES classic games, obviously. More closely to Mega Man 2. Like the classic games, his Mega Buster does pitiful damage, his weapons have limited ammo and he lacks a slide, giving him poor mobility. Oddly enough, he doesn't have his Mercy Invincibility, taking more damage in the process. Oh, and despite having a power bar, he lacks any specials or hypers along with fragile defense. However, he makes up for this with his sheer small size, making it hard for opponents to hit him. The Metal Blades can shoot in 8 directions, making it useful as an anti-air move and has the most ammo. The Time Stopper while as useless as in the original game (made even more worthless as Mega Man cannot recharge his weapons here, making this a one-time use until next round) can be used to interrupt attacks or flee from combos, allowing Mega Man to free himself. But his deadliest weapon is the Air Shooter. Thought it was useless? Think again! Remember that trick against Crash Man where if you position the tornadoes right, Crash Man takes enormous damage? Here, it's even easier as most fighters are big enough for Mega Man to hit. If the opponent is not careful, Mega Man can unleash a flurry of tornadoes and can drain the foe's health within seconds.
    • The Wasp Hive by an unknown authornote . It it totally immobile and doesn't do anything, but attacking it summons a swarm of deadly wasps that Zerg Rush the attacker and constantly sting them, which doesn't do much damage, but each hit causes stunlock, potentially overwhelming them in a Death of a Thousand Cuts combo that is very difficult to break out of.
    • Brergrsart's Fleet of Falling Father Figures. If it misses its only attack, the Fleet is instantly killed. But if the attack lands, it's a One-Hit Kill, and it's quite hard to dodge as well.
  • Lethal Lava Land: Diablo's stage, among others.
  • Loads and Loads of Characters: Players can download literally thousands of characters to play with. Many of the archive sites and wikis list somewhere over 2,000 characters, while betting sites SaltyBet and SpriteClub have more than 8,500, ranging from fighting game rips to original characters to characters based on (or ripped from) miscellaneous other video games and media. A large majority of them are Shotoclones, though. Sturgeon's Law is often in full effect, too.
  • Luck-Based Mission: Whether Bokosuka Wars wins or loses is purely luck, just like in the original NES game. It is also the only way he can give or receive damage. Any fight with Bokosuka Wars will be a draw if he cannot reach the enemy's hitbox (assuming the opponent even has one) or if the opponent is immune to grapples. A Mirror Match is also a guaranteed draw.
  • Luckily, My Shield Will Protect Me: The Metool's signature helmet guard makes it invulnerable against anything short of code manipulation, and is one of the reasons why it's a Lethal Joke Character.

  • Man-Eating Plant:
    • Hashi, technically is one.
    • Samurai Shodown Konoha uses one in her Zetusmei Ougi.
  • Mechanically Unusual Fighter:
    • There are lots of these floating around. An original character example is Omega Tiger Woods—he cannot block at all, but he has a crosshair that drops missiles (and a claw arm) on the enemy.
    • Most Shoot 'em Up characters in M.U.G.E.N become this, as they play almost exactly like in their source game. Examples include R-9, Fire Leo III, and Vic Viper.
    • Otherwise normal characters can become this if they are configured to play like this under certain palettes. ShinRyoga and Neo Ankh's Mario has a "ghost mode," where he is completely invincible and has a quickly charging power meter, but his health depletes fast as well.
      • SaltyBet and SpriteClub regulars know that most of these sorts of edits are usually placed on a character's 12th color palette (or "12p"). To ensure fairness during Matchmaking and Tournament modes, characters are limited to their first four palettes. When players request matches for the Exhibitions, any palette can be chosen.
    • Mirror Cube Square is a floating cube that fights solely with projectiles and is healed by attacks, but loses its health rapidly if left alone. The best way to beat it is to therefore not attack it.
    • Supermystery's Sonic the Hedgehog characters play like the Classic Sonic games. Pressing A, B, and C will jump (or spindash if you're crouching), X spawns itemboxes, Rings spawn at random, and, much like Sonic 2, collecting 50 rings will make you super.
    • Certain "fighters" aren't characters but rather entire levels in themselves, such as "M-NES Game 1", "M-NES Game 2", "Gameboy Game 1", and so forth.
  • Mega Manning:
  • Mighty Glacier: Plenty. Juggernaut, Hauser, the Alien Queen...
  • Moe Anthropomorphism: The OS-tans are in M.U.G.E.N already, as well as some of the Nijiura maids.
  • Mood Dissonance: A wacky, cartoonish character fighting in a Darker and Edgier setting can give off this effect, such as Stimpy on an Alien vs. Predator stage with bloody corpses in the background. The reverse obviously applies too, like a Predator on the Warner Bros. studio lot from Animaniacs. And of course, two characters of different mood styles fighting each other (Homer Simpson vs. Freddy Krueger).
  • Monster Clown: Dark Donald, an overpowered edit of Ronald McDonald, is even stronger than Rare Akuma.
  • Moveset Clone: Many sprite swaps or sprite edits of another character tend to be these, especially if the movesets aren't changed at all.
  • Ms. Fanservice: There is a character literally named "Ms. Fanservice". Created by DrKelexo, she is an edit of Warusaki3 and Kabao's Yoko Littner that includes cameos of several fanservice-friendly fighting game girls (e.g., Felicia, Dizzy, Chun-Li, Elena, Yuri Sakazaki and King).
  • Musical Assassin:
  • My Kung-Fu Is Stronger Than Yours: This is the basic premise of the EXTREMELY cheap characters (e.g., Chuck Norris) "taking part" in the Nuclear War, constantly being updated to beat each other. If any one of them is defeated, expect their update to have immunity to the move that killed it. This mindset reached the point where they became capable of winning matches against regular characters before a match even started.
  • Mythology Gag: Dcat's Krang has attacks, quotes, and even color palettes from various shows, comics and video games in the TMNT franchise (and in one instance, his crossbow move is taken from a kids' colouring book).
  • Nerf: Certain creators have modified overpowered/cheap characters into far more balanced versions of themselves, done by often removing or toning down the elements that made them overpowered. An example would be Yuki's Elque, modified to be far less overpowered by Ironcommando and Zigg4d.
  • Nigh-Invulnerability: Alot of the characters have either zero hitboxes or seemingly infinite health.
  • Nintendo Hard:
    • A lot of AI patches go here. For a specific example, look at the work of Misobin_ISM: He turns mild-mannered (but still challenging) characters into absolute monsters. His patch for Vergil basically pits you against an encyclopedia of his combos. Dio lays you out with some crazy tandems and abuses his teleport while defending. Geese will counter all of your moves and force feed you a Deadly Rave. His Shin Akuma is as insane as you would expect. There is also Hutano, who basically unlocks the true power within 9's Melty Blood characters and shows you some of the most nightmarishly evil combos ever seen.
    • Muteki's Guilty Gear characters are built with an aggressive AI that fully exploits the computer's natural advantage against human players. It blocks most attacks without a second thought and links together very long strings of attacks and supers to make sure that the human player can't fight back for more than a second; combined with the extremely fast gameplay of the franchise, this tends to turn anything not incredibly fast-paced into chowder.
    • Any of the Cyberbots characters (save for Z-Akuma) have unbelievable AI.
    • For a non-fighting example, pitting fhqwhgads7's The Kid and Yukari Yakumo together will start the match with The Kid in a scrolling obstacle course. Keep in mind that like in the game, The Kid dies with one attack, and you can't fight Yukari unless you get through the course. Even then, the match simply becomes a boss fight against Yukari... and Primeus.
    • For a long, long time, Sander 71113's Wolverine was known as an absolute monster and the bog standard for players looking for a challenge.
  • No Ending: Most characters do not have ending storyboards for completing arcade mode. Or intros, for that matter.
  • No Fourth Wall:
    • In one of her winquotes, RicePigeon's Yukari Yakumo recognizes M.U.G.E.N as a computer program, and how amazing it is to merge diverse worlds together, then concludes that humans must really have been inspired by her.
    • In general, it's possible to edit winquotes, so any character can play this straight. There is a version of Rocko who comments that M.U.G.E.N Day can be a very dangerous day.
    • Unlimited Team's Deadpool has an hyper move where he grabs standard M.U.G.E.N lifebars and powerbarsnote  and hits his opponent with them.
    • Pingurules' Robbie Rotten has one quote commenting that, since you're reading a victory screen, you must be playing version 1.0 or higher.
  • No-Holds-Barred Beatdown: Several melee super arts. One of Segalow's even uses the trope name.
  • Nonstandard Character Design: If your roster contains characters from games with wildly different art styles, this is bound to happen.
  • Nostalgia Level: There are a few Bonus Level characters that do this. The most popular ones are the ones made by Bane84. They are M-Nes_Game1 (Super Mario Bros.). M-Nes_Game2 (Contra), and M-gb_Game1 (Super Mario Land).
  • Nuke 'em:
  • One-Hit Kill: Any character that possesses an extremely convenient one to use is almost always considered to be extremely cheap and/or a Lethal Joke Character.
  • One-Hit-Point Wonder:
    • The Kid from I Wanna Be the Guy. Complete with blood spatter and GAME OVER. PRESS "R" TO TRY AGAIN.
      • Subverted in later versions where he gains super armor while facing himself.
    • The Space Invader is destroyed in one hit, but its laser is a lethal attack.
    • Flappy Bird. If he gets hit even once or if he touches the ground, he's toast. If he uses his Limit Break and bumps into any of the pipes, he's also toast.
    • Bokosuka Wars loses all his life if he loses the coin toss on his attack.
  • Overly Long Fighting Animation: Many a One-Hit Kill qualifies for this, but special mention goes to Goldion Hammer, which has a one-minute-long animation.

  • Painfully Slow Projectile: Quite a number of characters have slow-moving projectiles that can be easily avoided... or can be used to cover stay on the screen for a good while so that the opponent has less breathing room.
    • Space Invader's only attack has it fire a single slow-moving pixelized ray that can be easily blocked or jumped over (and can only have one on-screen at a time). If this connects and isn't blocked, however, it's a One-Hit Kill.
  • Petting Zoo People: Izuko Chrysoberyl and many other characters.
  • Power Creep, Power Seep: This tends to happen when creators do not adhere to the idea of converting characters exactly as they were in the source game.
  • The Power of Rock:
  • Pragmatic Adaptation: While most characters are either labelled as accurate but actually aren't, there are a number of characters that are deliberately not meant to be accurate, such as CCI Ironmugen's Ryo or The_None's Shaq. In some cases, accuracy may not be a good thing.
  • Press X to Die: The F1 key does this to player 2. For player 1, it's CTRL+F1.
  • Rage Quit: This is parodied with Rage Rock, whose Hidden Desperation Move crashes the game.
  • Real Men Wear Pink: Since it is easy to customize the colors of the character palettes, it is easy (in most cases) to put even the manliest of men in pink clothes.
  • Red Oni, Blue Oni: Anything involving Arpa/Chainsawdentist will inevitably have him as the Red Oni, except for his videos with Ashram VII, which has more of a Crimson Oni Scarlet Oni dynamic.
  • Retraux: Some of Masukenpu-kun's characters emulate the NES style, featuring 8-bit graphics and 2 button gameplay. So far, these characters include Gorilla, Guerrilla, Sumo, Ninja, and Kangaru.
  • Rule 63:
  • Rule of Fun: This is the only real explanation for the numerous offbeat characters available in the community. Considering how you can pit Peter Griffin against Fat Albert against Sonic the Hedgehog against Michael Jackson against Chuck Norris if you want to, no other explanation is really needed.

  • The Sandbag: The Trope Namer, made by gncmario, is a character. However, it can't be controlled. This also makes it the ultimate Joke Character.
  • Schizophrenic Difficulty: In addition to the Lethal Joke Characters covered above, there are several characters (or at least versions of characters) who are much harder or easier to take on than you might think. Alucard's AI is pretty easy, but Team S.M.R.T's Homer Simpson can be a tough fighter, especially if he enters Riot of the Beer Mode.
    • In general, characters from older games with extremely different mechanics and pace can have problems with characters from newer games—think Street Fighter II versus Guilty Gear.
  • Shapeshifter:
    • The_None released a version of Kishima Kouma dubbed "Shadow Kouma" that at first appears to be a perfectly innocent custom take on the character. Then you actually see him in action and he turns out to be a Shang Tsung type fighter who transforms into every character The_None has created for his attacks. He does have a handful of unique moves, including a team up with Ralf Jones and JoJo style tandem attacks.
    • Before that, there was Cerenas's Sihon (who transforms into various Samurai Shodown characters) and the collaboration between Andre Lopes and Ryan Kerns in the form of Mugena (who mainly transforms into various female characters).
    • Shang Tsung himself as well. OMEGAPSYCHO's version deserves special mention, as he managed to make him able to transform into nearly every MK1 character but Goro. Juano's Shang Tsung features every Mortal Kombat II character (including Jade, Noob Saibot, and Smoke) save for the bosses.
    • Ditto transforms into other Pokémon and uses one of their moves whenever it attacks.
  • Shotoclone:
  • Shout-Out:
    • Kamek is loaded with them. He can summon one of three Pokémon at will and can use fatalities, one of which is directly based on one of Smoke's. His Troopa Rush super is admitted in his readme to be a takeoff of Tron Bonne's Lunch Rush special. Some of the objects that can fall from the sky in his Switchblock Drop super are the Egg-o-matic, the Master Emerald, a cow, and Lavos. And he can use Ultima.
    • Numerous characters use Mortal Kombat-esque fatalities or otherwise incorporate something from the game, such as Most_Mysterious's Dink Smallwood speaking some of Shao Khan's lines, or the "Shao Mario" from Slot Machine, which is Mario's Super Mario World-appearance given Shao's voice.
  • Showy Invincible Hero: The players who make M.U.G.E.N videos on YouTube.
  • Silliness Switch:
  • Situational Sword: It is possible to code attacks that can only hit in certain situations. Some examples: If the opponent is in the hit state note ; if the opponent is not in the hit statenote ; if the opponent has been hit by a certain previous attack note ; and if the opponent was not hit by a certain attack note .
  • SNK Boss:
    • Depending on the creator, a character's AI can be written in such a way that any character (even existing SNK Bosses) can turn this trope Up to Eleven.
    • Akame counts when computer-controlled. Due to her advanced AI, she is quick to pull off her moves, and she reads you like a book, meaning she can block many of your own moves and counter with her "Barrier Burst." Some of her specials can even KO you instantly!
  • Some Dexterity Required: This tends to occur as a reflection of the source game (e.g., "The Pretzel", the Fan Nickname for Geese Howard's Raging Storm command), although changing the command to something easier is a simple matter of character editing.
  • Spiritual Successor: The readme claims that inspiration for the engine was taken from the PC homebrew Street Fighter II clone SFIBM (at least in part). It also had a modular engine that facilitated editable characters to the point that some gained new moves and others were completely broken. Not unlike many MUGEN characters.
  • Stylistic Suck:
    • Kung Fu Man's default intro and ending storyboards qualify, as they look like a child's crayon drawings.
    • Most_Mysterious's (of Omega Tiger Woods (in)fame) entire creationhood can be basically summed up as this.
    • Dee Bee Kaw's sprites are all MS Paint.
    • The Dancing Banana also counts in a way, what with being a rather pixelized character, but the reason for this is because his graphics are based off the original emoticon.
    • ADOM's sprites count as this with clear inspiration being taken from various animation errors found in DDR's creations.
    • Brergrsart's True Monando Boy, being based on Shalk, naturally has this, his sprites looking like they were drawn in MS Paint.
    • The majority of characters made by the author Googoo64 are this. They're horribly animated, yes, but that won't stop them from kicking the asses of some of the stronger characters on the roster.
  • Summon Magic: Some characters do this as a Super Move by calling in a reinforcement to perform an assist (see Kamek in the Shout-Out entry above). For example, Hatsune Miku takes this Up to Eleven with her super singing attacks - if she sings a soundtrack from a well known franchise, a character from the franchise comes in to perform the assist. And given how many there are...
  • Super Move Portrait Attack: The_None's Shadow Kouma deserves special mention, for that he has a super move that takes this trope literally. Yup, said move involves the portrait itself hitting the opponent.
  • Stone Wall: Frost Man fits this bill. He has permanent Super Armor that makes him Immune to Flinching. He cannot be comboed, thrown, or stunned. Thanks to his high defense, he is a durable and damn near unstoppable tank. However, he also has limited attacks, does pretty weak damage (save for his Super Moves), and lacks good combos. A few characters can even break his Super Armor if they possess the right counter moves.
    • Plant Man from Mega Man 6 has a Power Battle version where his Plant Barrier makes him immune to all attacks. The trade-off: His regular buster (seed?) shot takes about a second to activate and can only shoot one seed at a time. It does pretty weak damage, too. He can still use his shield to attack, but that will lose his invulnerability.
  • Swiss Army Weapon: Most of 3ha's characters have custom modes based on completely unrelated characters. Among examples:
  • Tag Team: An undocumented code called TagIn allows a character to change their state as well as that of their partner's. This can be (and often is) used for a Tag Team function as well as a Switch-Out Move.
  • Take That!:
    • Rare Akuma is the godfather of all Take Thats, aimed at shitty "Shin", "Orochi", and "Evil" edits of many characters. He has an abundance of special effects, is effectively immortal, and can kill most characters in the space of a few seconds.
    • There is an entire full game being made with nothing but Akumas with completely different movesets. The creator of the project, Basara-kun, admitted he did it because he was sick of all the Akuma edits going around.
    • Rikard's most prolific creation is Slightly Pissed Off Ryu, a parody of the various Shin, Evil, Orochi, Violent, and Holy Ryu edits on the internet. Rikard's "story" basically sets Ryu as a McDonald's bum, depressed and physically out of shape after finding his wife Sakura cheating on him with Akuma (he has appropriate, and hilarious, victory and winquotes against both of them). His Hadokens are usually a pathetic short range burst, his Shinkuu Hadoken may U-turn right back into his own face, he falls flat on his back after a Shoryuken, he sometimes breaks his ankle when he does his trademark Hurricane Kick, and one of his other attacks has him lobbing either a McDonald's meal or M. Bison's corpse at his opponent. Most Ryu edits run on graphics over gameplay; this one runs on pure Rule of Funny.
    • P.o.t.S released Bison...literally. It is an actual bison with M. Bison's cap on its head. It uses distorted versions of Norio Wakamoto's voice clips from Capcom vs. SNK 2: Mark of the Millennium as well as clips from the Animated Adaptation. Given the inspiration, Bison is balanced as a boss character—he has high stamina, infinite prevention measures, and an AI that takes full advantage of the character's high power. Instead of being a Take That! to cheap characters as Rare Akuma was, Bison is a Take That! to joke characters and serious characters, simply by existing. Hilarity did indeed ensue.
    • Arpa's Casual Evil Ryu is a huge-yet-sly Take That! to Infinity Mugen Team's "Eternity of Heroes" character template (and its many, many flaws), amongst other things. He outright says so in his True Readme...which is written in Saurian and also features a Take That! to that game.
    • Two particularly infamous badly-made characters by the same author (Peter Griffin and Bender) were glitchy messes that flashed in weird colors, had very limited animation, overpowered stats and nonsensical attacks. Ironcommando made a character named "20000" that murders both of those characters during his intro.
  • There Is No Kill Like Overkill: Anything involving lots and lots of blood, characters with lots of flashy effects, and any attacks that reach the 999 combo limit. Ironcommando is pretty much a top contender, if not the Overkill Overlord. Once he became much less egotistical and willing to listen to feedback, he stopped adhering so strictly to the trope.
  • Time-Limit Boss: Yee (yes, that Yee) is essentially this, since each time Peek finishes his song, Oro's head will pop in as an unblockable, fullscreen attack that will kill most characters within four hits.
  • Training Stage: This is one of the two stages that comes pre-packaged with M.U.G.E.N (along with Kung Fu Man's stage), and is often used for character demonstrations due to both the ready availability and the lack of distracting, flashy scenery.
  • Trope Overdosed: Since the engine allows for a crossover of practically every 2D fighting game in existence, this was bound to happen.
  • Ultimate Showdown of Ultimate Destiny: This bears repeating—every fighting game character in history, and then some.
  • Unexpected Gameplay Change: It is theoretically possible to import any character from any game, not necessarily fighting games. This trope is the end result if the characters are ported with their source mechanics. For instance, there are versions of Marisa and Patchouli, using their Mega Mari sprites and gameplay.
    • Certain bonus stages can be this. One minute you're fighting your opponent; the next, you're dancing DDR style or going through World 1-1 from Super Mario Bros.
  • Unwinnable by Design: Any fight against Oni-Miko-Zero, Debugger (if he is on P1's side), or any registry editor-based character for that matter.