[[quoteright:218:[[VideoGame/SuperKOBoxing2 http://static.tvtropes.org/pmwiki/pub/images/undefeatable_000_8463.jpg]]]]

->''"Well, that was unexpected..."''
-->-- '''Chaos Warmaster [[Literature/CiaphasCain Varan the Undefeatable]]''', ''TabletopGame/{{Warhammer 40000}}'', [[FamousLastWords last words]]

A regular scourge in the ring: a character so powerful, so unstoppable, that not even the greatest of fighters can overcome his wrath. Be it a GentleGiant, an ArrogantKungFuGuy, or the TheBigGuy with a mean streak, this character is an unbeatable scourge that other fighters either dread facing or anticipate fighting in order to gain fame for being the first to beat him. However, they all fail. But nothing lasts forever...

Basically, this is a character who is introduced as and/or is famous for being brutally unstoppable, and, for a long time, they continue to be so, until that one hero (or villain) can finally show the world what he's made of by defeating him. These characters appear in varied roles: they can be a BigBad, TheDragon, or, sometimes, just some seemingly unobtainable goal. Often, such a character will also be either a {{Jerkass}} or somewhat intimidating to give the hero even more support for beating him, but not always. This character may also play a role of the ''[[DavidVersusGoliath Goliath]]'' if the one who beats him looks to be totally outmatched at first glance.

Said undefeatable may come in the form of an ImplacableMan or HeroKiller.

Depending on the character, the fighter can still stay as powerful as they were after being beaten, but, occasionally, once beaten, they lose their power and become a regular fighter just like the rest. See TooPowerfulToLive, LordBritishPostulate, and DidYouJustPunchOutCthulhu. Compare TheWorfEffect.


[[folder: Anime and Manga]]
* Happens twice in ''Anime/TengenToppaGurrenLagann'', once when Simon defeats Lordgenome, and again when Team Dai-Gurren overcomes the Anti-Spiral.
* The East is burning red! Master Asia's first appearance on screen in ''Anime/MobileFighterGGundam'' involves destroying 3 giant robots with his bare hands by catching and returning artillery shells, picking up the ground one was standing on, and tearing one to pieces with a headband. He is in fact explicitly titled "The Undefeated of the East"
* ''Manga/OnePiece'' fans theorize that this is the reason Captain Whitebeard was rarely characterized as anything but 'the world's strongest man'. Obviously someone's going to rise to his level and beat him in battle, most likely the main character or a future BigBad. [[spoiler:It actually took an entire army, including all three [[OneManArmy Admirals]] and five of the Seven Warlords of the Sea, a regretted ambush from one of Whitebeard's allies, and Blackbeard's entire crew to kill him.]]
** Shown example includes when Luffy defeated Eneru, due to being a RubberMan which Eneru's lightning powers couldn't directly harm. Up until then, the Skypeians, some of the Shandians, and possibly even Nami believed, from seeing what he could do, he was as he said literally [[AGodAmI an invincible god.]]
** Another example is when the Straw Hat Pirates raided Enies Lobby and defeated [=CP9=], who have never failed a mission, [[ShroudedInMyth exist only in rumor]], and as far as Marines were concerned, were the reason Enies Lobby had never fallen to anyone. In fact, this generation of [=CP9=] were the strongest in its history. More specifically, Monkey D. Luffy defeating Rob Lucci, the strongest ''individual'' in [=CP9=]'s history, who had such a reputation that the Marines leading the Buster Call were more than willing to bet that he would win for sure. Only for him to be put in a coma by Luffy. Even Bartholomew Kuma did not see coming that Lucci would be defeated ''at all'', let alone by Luffy.
** Crocodile definitely counts. He's introduced to us as the first Big Bad of the Grand Line, belonging to the same group as Mihawk (who had curbstomped Zoro a while earlier). Luffy challenges him... and gets almost killed. Crocodile proceedes with his plan, but Luffy turns up again, knowing Crocodile's weakness... and gets almost killed again. In the end the rubber man manages to defeat the sandman - who had fought with a poisoned hook. If it weren't for his extreme luck, Luffy would be deader than dead.
** Which makes the one guy of this type that remains all the more awesome: Mihawk. He is always referred to as "the World's Greatest Swordsman", has never been defeated and used to spar with Shanks until Shanks lost his left arm, after which he didn't see enough of a challenge in him. Just a reminder, Shanks is one of the four guys the entire Marines are supposed to counteract.
** Beating one of the Seven Warlords of the Sea or Four Emperors in general is this trope. The Warlords rely on their reputation just to help cull the pirate population, while the Emperors have been stated to be the four most powerful pirates in the world. Defeating any one of them could throw the balance of the Three Great Powers off the kilter.
* Kazu from ''Manga/AirGear'' was already getting some serious badass cred from his fight with Sleipnir, but he finally proves, once and for all, that he's no longer the little bitch who needs [[TheHero Ikki]] to fight for him when he [[spoiler:takes out Nike, a ridiculously powerful HeroKiller who's [[ImplacableMan never lost a fight]]]]. Sure, he had help, but he still stood alone for most of the battle.
* In ''Manga/HajimeNoIppo'', we have WBA Featherweight Champion Ricardo Martinez, the "living legend", who is just ''made'' of this trope. Point. by. point. [[spoiler: Eiji Date, the former Japanese champion, local RetiredBadass and the only person to defeat Ippo was defeated ''twice'' by him.]]
** Takamura, one of the ''protagonists'', is this trope to all of his opponents. He ''has'' the reputation of being unbeatable and his opponents do fear and respect his strength. In fact, WordOfGod outright says he is the best boxer in the entire series, above even the aforementioned Ricardo.
* Three villains in ''Manga/DragonBall'' and ''Anime/DragonBallZ'' (King Piccolo, Frieza, and Buu) were known to be nearly unstoppable and had been terrorizing the world/galaxy/universe for ages; eventually all three of these were defeated by Goku.
** Frieza in particular was referred to by every character who knew him as the undisputed strongest being in the universe, such that he has (at least by his claim) never had to use anything close to his maximum power to defeat an opponent before he faces the Z-fighters, and even the arrogant Vegeta didn't want to fight him without the power of ''immortality'' on his side.
** Broly's unique form of Super Saiyan is apparently ''the'' Super Saiyan of legend, which renders Vegeta (usually beyond stubborn) near-catatonic in his presence. It takes the combined efforts of the main cast to defeat him.
** Cell is a unique case of [[FromNobodyToNightmare a villain who goes from being a simple minded man-eating monster to the closest thing to a god at that point at the time]] and he was also stronger than Goku at the time. In fact he is this until Gohan kills him.
** The role is reversed with Beerus, the BigBad of the 14th movie and the universe's designated God of Destruction. Not even Goku can defeat him, even after he briefly becomes a Super Saiyan God. To top it off, not only is his attendant Whis actually his trainer, but he reveals that the other universes have warriors stronger than him or Goku.
* In ''Manga/{{Naruto}}'', Gaara had never been injured before his fight with Lee, and Naruto defeated him for the first time. Pain also never lost a battle, even against the leader of the Rain Village, one of the strongest ninja in the world who defeated the three Sannin, [[spoiler:until he loses to Naruto.]]
* In the ''Franchise/DotHack'' franchise, just about anything created by Morganna might count: the Dawn Wanderers (aka "Guardians") went undefeated throughout ''Anime/DotHackSign'', except at the end, where ''one'' was taken down by a large team of players (that included one of the most powerful players in the game, bar none). The eight Phases (Skeith in particular) also wreaked havoc throughout The World, being completely unstoppable by way of having infinite HitPoints.
** The backstory also provides another example in The One Sin, a boss monster of the original World so powerful no player could beat it. Doing so is what earned Balmung of the Azure Sky and Orca of the Azure Sea their status as legendary players.
* From ''LightNovel/ACertainMagicalIndex'', Accelerator. The most powerful esper in Academy City, no one has ever managed to land so much as a single blow on him. Then Touma Kamijou comes along, manages to negate Accelerator's power, and defeats him in combat by punching his lights out. Touma has a tendency to do this to other people as well, all thanks to his power to nullify anything.
** Shizuri Mugino was ranked the fourth most powerful esper in Academy City, then Shiage Hamazura, a guy with no powers at all, tricks her into blowing herself up. All thanks to his ingenuity and determination, he beats her in both rematches as well.
* ''Franchise/LyricalNanoha''
** ''Manga/MagicalGirlLyricalNanohaVivid'' has Sieglinde Jeremiah, a tournament veteran who had never been defeated in battle, and whose single loss was due to her not appearing for her match. [[spoiler:Einhart]] gets a shot at breaking her streak [[spoiler:and eventually fails.]]
** Subverted in ''Anime/VividStrike''. Rinne Berlinetta was originally set up like this, only for it to be revealed that Vivio has already beaten her in the past. That said, Rinne's only lost was in points and she hadn't been defeated via knockout yet [[spoiler:until her second loss to Vivio]].
* ''Anime/{{Pokemon}}'': The Elite Four, as well as several other characters, including the infamous legendary spammer Tobias. While Ash fails to win the match against him, even defeating his Darkrai counts since it's a feat no one else accomplished. The fact he manages to also take out his Latios is icing on the cake.
* In ''Manga/SpecialA'' Hikari's goal is to beat her rival/LoveInterest, Kei at something. ''Anything''. Unfortunately, Kei's TheAce and is undefeatable at ''everything''. The only person to ever beat him is BigBad Yahiro, who cheated.
* [[FieryRedhead Lina]] [[DestructiveSavior Inverse]] and her TrueCompanions are finally called ''{{LightNovel/Slayers}}'' at the end of Evolution-R, after [[DidYouJustPunchOutCthulhu killing]] (part of) [[GodOfEvil Ruby-Eye Shabranigdu]].
* The ''Franchise/YuGiOh'' franchise's protagonists tend to make a habit of this, starting with a duel against Seto Kaiba...
** Yami Yugi's losses could be counted on one hand, and even then they were always the result of the opponent cheating or manipulating the duel is some way [[spoiler:until the end of the series when he loses fairly in a duel with Yugi.]]
* Played with in the manga version of ''Manga/YuGiOhGX''. Judai keeps the habit early on, including a 2-on-1 victory against Manjoume (because the latter refused to work with his spirit card, whereas Judai and Winged Kuriboh are inseperable). [[spoiler: Manjoume then returns the favor in the TournamentArc... only to be defeated by the much more [[AlwaysABiggerFish undefeatable Marufuji Ryo]].]]
* Kaito had this attitude during his duel with V in ''Anime/YuGiOhZEXAL''. (Of course, while V's card, Number 9: Dyson Sphere, was a ''very'' powerful card that sure ''seemed'' undefeatable, V's claim that it was never defeated [[FridgeLogic had an obvious flaw:]] he clearly could not have used it more than once or twice in the past, seeing as a duel using a Duel Monster the size of the sun would likely have been witnessed. So his boast that it had "never been defeated" was probably meaningless. Unless one considers the possibility of V using this card in Duels not involving realistic holograms, but seeing how the series treats Duels, Especially ones involving Numbers, as SeriousBusiness with RuleOfCool, it's improbable.)
** ''Definitely'' meaningless. In a later duel, Kaito used Number 9 against Tron, and Tron defeated it with a Monster that was not even his strongest card. Clearly, there are far stronger Numbers than Number 9, and V's claim was complete BS.
** Or... Tron was the person who taught V how to fight, considering this was his father who was also a more experienced duelist than he was.
* In ''LightNovel/HighSchoolDXD'', Raiser Phenex was supposed to be undefeatable because of his HealingFactor, but Issei defeats him with holy water and a Christian cross, both are devil weaknesses. It helps that Issei has a dragon arm that makes him partially immune against those weaknesses.
* At the start of ''Manga/InitialD'', the Akagi Red Suns were undefeated in the world of street racing even as they went around Japan challenging other racing teams on their home turf. This all changed when they challenged [[CrouchingMoronHiddenBadass Takumi and his Toyota Trueno AE86]] in a downhill race on Akina.
** On the flipside, Project D has yet to be defeated legitimately (Takumi got defeated a few times, but most of his defeats are technical).
* ''Manga/TokyoGhoul'':
** Kishou Arima has such nicknames as "The Undefeated Ghoul Investigator" and "{{Shinigami}}". During the finale of the first series, Kaneki finds himself facing off against him. [[spoiler: ......and is mercilessly subjected to a CurbStompBattle that leaves him on the verge of death. But in the process of going down, he manages to damage Arima's weapon and even ''nick'' him. It seems this impressed Arima enough that the sequel shows he's taken an amnesiac Kaneki as his [[MoralityPet protege]] and serves as a ParentalSubstitute to him]].
** In the sequel, the Quinx and Itou Squads find themselves facing [[ImplacableMan Noro]], a ghoul infamous for being a nigh-invulnerable horror. They manage to bring the creature down, but at a terrible cost: [[spoiler: Shirazu and the majority of Itou Squad are killed in the process, with Kuramoto and Mutsuki both suffering serious injuries]].
** The sequel also sees a rematch between Kaneki and Arima. [[spoiler: Though initially overwhelmed and fully intending to commit SuicideByCop, Kaneki eventually regains his will to live and defeats Arima in battle. Afterwards, Arima ponders having remained unchallenged for his entire 18 year career.....and then slashes his own throat, dying in Kaneki's arms while confessing his secrets. As a dying request, he asks Kaneki to take credit for his death and promises the reason will become clear soon]].
* ''Manga/AttackOnTitan'': Eren manages this during the battle with [[spoiler:Reiner]]. At least, [[spoiler:until he puts out a DistressCall and Bertolt [[DeathFromAbove falls on them]]]].

[[folder: Comic Books]]
* Champion of the Universe: a Creator/MarvelComics character who goes around the universe challenging people to boxing matches, who was undefeated until [[ComicBook/FantasticFour The Thing]] stood up to him. Not that Thing beat him physically; Thing was just too stubborn to stay down after getting knocked out, so the Champion conceded. More recently ComicBook/SheHulk beat him too.
** Champion of the Universe is considered by many fans to be a subversion (or very bad example) of this as he has pretty much never defeated ''anyone'' with a name.
*** He has defeated Adam Warlock, ComicBook/BetaRayBill, Drax the Destroyer, the Silver Surfer and ''Gladiator''. He handily beat She-Hulk as well; however, she then spent a month working her ass off (in human form) and bulked up impressively...and realized the Infinity Gem he was using could be counted as a "weapon" - and was therefore against the rules - and beat the tar out of him. With the Gem, he is ''undefeatable''. Without it, he's tough, but not impossibly so. Gladiator is quick to note that any of them could have beaten him at that point, to which She-Hulk responds by... saying something outrageously sexist.
*** He is apparently defeated for good when Titania, armed with the Gem, picked up a mountain and squashed him under it. He's immortal, but without the Gem, [[AndIMustScream he's not strong enough to free himself]].
* Manute from ''ComicBook/SinCity'' was TheJuggernaut of the series. At the end of ''A Dame To Kill For'', Dwight had to resort to shooting Manute several times, kicking him off a roof, and then having Miho pin him to the pavement by shoving swords into his arms. This did not kill him, nor did it even knock him out. It got him out of the way nonetheless. He's killed in a hail of gunfire in the next volume, ''The Big Fat Kill''. In the extended cut of the movie, this was changed to being bisected by Miho.
* This is ComicBook/SquirrelGirl's shtick, since she's a Silver Age hero in a Modern Age setting.
* In ''ComicBook/TheDarkKnightReturns'', [[spoiler:Batman defeats Superman. An ''old'' Batman versus a Superman who hasn't aged a day. It takes missiles, an overpowered [[MakeMeWannaShout supersonics gun]], PoweredArmor, electrical gauntlets ''powered by the whole Gotham City'', the Bat-Tank, and a kryptonite-tipped arrow, but he actually does it.]]
** [[spoiler:Although, as per usual, Superman really wasn't fighting to kill or seriously injure Batman. Also he recently had a nuke explode on his face, and was still recovering.]]

[[folder:Fan Works]]
* In ''Fanfic/CodeGeassThePreparedRebellion'', Zero hands Cornelia her first defeat at the Battle of Saitama Ghetto

* ''Film/{{Miracle}}'', which is [[BasedOnATrueStory based on the "Miracle on Ice"]] hockey game described under Real Life.
* The German film ''Das Wunder von Bern'' (2003), [[BasedOnATrueStory based on the 1954 "Miracle of Berne"]] described under Real Life.
* Tai Lung in ''WesternAnimation/KungFuPanda''. So powerful that not even an army of rhinos, the Furious Five, or ''his own master'' could stop him. Po defeating him is what finally secures his status as [[TheChosenOne the Dragon Warrior]].
** It's specifically mentioned that the only other person who can defeat Tai Lung (Shifu's own teacher, Master Oogway) has just [[AscendToAHigherPlaneOfExistence ascended to a higher plane]]. It's possible that Shifu himself could have defeated Tai Lung using Oogway's technique, but he likely hasn't mastered it yet, and there's still the guilt he has over Tai Lung's StartOfDarkness. Basically, Shifu deciding to stay and fight Tai Lung is even stated to be a DelayingAction, while Po and the Furious Five help evacuate the valley.
* Played with in ''Film/RealSteel'' where Zeus is a robot fighter that has won every match he fought by knockouts on the first round. That changes in the fight against Atom, where the latter gets up after a vicious beating right before the first round ends. [[spoiler:Ultimately, Atom is unable to win but so is Zeus and, although he ends up winning by technicality, the audience of the match considers Atom the true winner because he came close to actually knocking out Zeus]].
* Luke Skywalker does this in ''Film/ReturnOfTheJedi'' when he finally defeats Darth Vader in a lightsaber duel, who had personally defeated and killed countless Jedi who were far more experienced. Vader is completely caught off guard [[spoiler: and decides to return to the light side of the Force when Luke then spares his life rather than kill his own father]].
* Combined with SerialEscalation in the ''Franchise/{{Rocky}}'' series:
** ''Film/{{Rocky}}'': Rocky is a nobody boxer given a chance against Apollo Creed, an unstoppable champion who wins every single fight via knockout. Subverted in that Rocky doesn't actually ''beat'' Apollo. However...
** ''Film/RockyII'': Because the Rocky/Apollo fight was so close, a rematch is demanded, only this time Apollo has trained to become even ''more'' Undefeatable. This time around Rocky does beat him, but barely.
** ''Film/RockyIII'': Rocky has become complacent as the World Heavyweight Champion, fighting a string of no-hopers arranged by Paulie to keep Rocky from losing his title. Then the monstrous Clubber Lang demands a bout with Rocky, beating him soundly and knocking him off his pedestal until he returns for a successful rematch, courtesy of some training from [[DefeatEqualsFriendship former rival]] Apollo Creed.
** ''Film/RockyIV'': Rocky goes into retirement. The Soviets unveil their steroid-pumped ''machine'' of a boxer, Ivan Drago. Not even Apollo Creed can beat him, so Rocky [[TenMinuteRetirement comes out of retirement]], flies to Russia, trains by jogging in the snow and chopping trees instead of using fancy machines, beats Drago, and single-handedly ends the Cold War.
** ''Film/RockyV'': Rocky, unable to fight himself due to old age and a brain injury, goes into retirement, but agrees to train and manage the [[RecklessSidekick impetuous, street-fighting]] Tommy "The Machine" Gunn. However, Gunn's arrogance and bad temper culminates in a streetfight against his [[RageAgainstTheMentor former mentor]] Rocky. Guess what? Rocky beats him, though the original script ended with his death shortly afterwards.
** ''Film/RockyBalboa'': Rocky [[RuleOfThree goes into retirement]], but finds himself dissatisfied with the inexplicable [[DudeWheresMyRespect lack of respect]] he receives despite his impressive record. Thus despite being in his 60s, he [[TenMinuteRetirement stages a comeback]] and, just like in the first movie, fights to a draw with the world champion, Mason "The Line" Dixon. In [[Film/{{Creed}} the next film]], his retirement finally sticks, and he acts as a mentor to Apollo Creed's son, Adonis.
* ''Film/GameOfDeath'': The guardians of the pagoda in the original version have exceptional skills and are thought to be undefeatable. Bruce Lee disproves this.

* As mentioned in the page quote, Varan the Undefeatable from the Literature/CiaphasCain novel ''Cain's Last Stand'', whose reputation largely stemmed from [[spoiler:his use of a Warp-derived CompellingVoice to force his opponents to defect to his cause]]. This being a Ciaphas Cain novel, you get no points for guessing who wins the inevitable confrontation between the two.
* ''Literature/ASongOfIceAndFire'': Robb Stark never lost a battle in the War of the Five Kings. [[spoiler: He still ended up losing the war (and his life) because treacherous allies turn on him and join his enemies. Together, they hatch a plan that becomes the backbreaking and traumatic Red Wedding.]]
* In ''Literature/TimeScout'', ''Wagers of Sin'', Skeeter Jackson steals a small fortune from an undefeated champion of the Roman arena. Guess who Skeeter ends up facing there? Guess who wins?
* In ''Literature/TheExcaliburAlternative'', there is surprise all around when a hitherto untouchable [[spoiler: Federation battle squadron gets utterly {{Curb Stomp| Battle}}ed by Avalon Empire forces.]]
* Parodied in ''Literature/{{Discworld}}'' book ''Discworld/SoulMusic'', where an up-and-coming BarbarianHero decides to call himself Vincent the Invulnerable, goes into the Mended Drum to announce this, and lasts about twenty seconds. In fact, [[TooDumbToLive terminal stupidity of this type]] is [[TheCoronerDothProtestTooMuch quasi-officially designated as "suicide" by the Watch]], suggesting that this happens ''a lot''.
** There's also a remark in ''Discworld/InterestingTimes'' where Rincewind thinks to himself that many a dark lord's FamousLastWords were "You can't kill me because I've got magic ''[[KilledMidSentence aaaaaargh!]]''"
* A folk tale or legend is used by the trainer of Warders in the ''Literature/WheelOfTime'', as a warning not to get cocky. He asks his class who the greatest swordsman of all time was. They all respond immediately and in unison. He then asks who handed him his only defeat. They are silent. "A farmer with a quarterstaff!" This particular lesson was delivered after Mat Cauthon, a farmer with a quarterstaff, had just defeated Gawyn and Galad, two of the best students in the group. At the same time. While recovering from an injury.
* In ''Literature/MistbornTheOriginalTrilogy'' the Lord Ruler's most feared enforcers are the Steel Inquisitors, mysterious figures with steel spikes driven through their eyes and protruding from the back of the skulls, and believed to be invincible. That Kelsier manages to kill one, pinning it to a wall by its own eyespikes and decapitating it, goes a long way to convincing people that the Lord Ruler is capable of being defeated at all. [[spoiler: The rest of them in the city are killed the easy way, when an infiltrator discovers their AchillesHeel and uses it to destroy them as they sleep.]]
* Arra Sails, one of the few women among the ProudWarriorRaceGuy vampires in ''Literature/TheSagaOfDarrenShan'', is this in the combat halls of Vampire Mountain. [[spoiler: She is defeated by Kurda Smahlt, a [[ActualPacifist peaceful]] person but an [[MinoredInAsskicking unexpectedly good fighter]], [[UnderestimatingBadassery because she underestimated]].]]
* Amongst thousands of challengers, Karsa Orlong from ''Literature/MalazanBookOfTheFallen'' is the fist to manage killing [[spoiler:the Emperor of a Thousand Deaths]] who was supposed to be unkillable. Though he had help figuring out what the problem was, and Samar Dev at hand, who [[spoiler:had the souls trapped in her knife help transport him to the Warren where he could kill Rhulad before he was revived by his sword again]].

[[folder: Live Action TV]]
* ''Series/WalkerTexasRanger'': The fifth-season episode "Warriors," where a criminal steals a genetic healing formula from a scientist (who was perfecting it for the benefit of good), and then uses it to develop a prototype muscleman that couldn't be stopped. Walker and Trivette find out firsthand how brutal this man-mountain is when nothing they do can so much as faze him. Eventually, during a final confrontation where the muscleman has Walker beaten to a pulp, the scientist throws flammable liquid and a blowtorch in his face, and Walker is able to finally kick the stunned muscleman to his doom.
* General Staal of the 10th Sontaran Battle Fleet, known as "Staal the Undefeated", from the ''Series/DoctorWho'' two-parter "The Sontaran Stratagem"/"The Poison Sky". The Doctor addresses the lack of foresight such a name shows.
--> '''The Doctor:''' That's not a very good nickname. What if you do get defeated? "Staal the Not Quite So Undefeated Any More But Never Mind"?
* T-Minus from ''Series/BattleBots'' defeated Hazard...[[http://www.youtube.com/watch?v=NHSAH8U0fL4 in the quarter finals]]. For those of you who don't know, Hazard was previously undefeated for 3 tournaments and [[http://www.youtube.com/watch?v=TeoJCYz10go obliterated almost everything it fought]].
* Across the pond on ''Series/RobotWars'', there was the ultimate house robot, Mr. Psycho. 750kg of heavily-armed, heavily armoured hell on tank treads. Some roboteers mess with the house robots from time to time, but Mr. Psycho was the exception because even ''attempting'' to attack him was basically futile. Unfortunately for Mr. Psycho, [[https://www.youtube.com/watch?v=d7nyYaKxJgI#t=5m50s nobody told Team Firestorm the meaning of "futile"]].
** Razer, with its huge crushing beak and fearsome design, is one of the most impressive robots to have ever appeared on the show and had a win/loss record to match: ''40 victories'' against 6 losses, four off which were immobilisation by technical issues and one being a controversial judges decision. Razer has, however, been beaten by knockout ''twice'' by the same robot: Pussycat. [[spoiler:And a third time by Pussycat's [[{{Expy}} successor]] Kill-E-Crank-E in the 2016 reboot. [[TakingYouWithMe Well, sorta]].]]
* [[TheDreaded Theokoles]], [[RedBaron the Shadow of Death]], from ''Series/SpartacusBloodAndSand'', an undefeated gladiator who once killed ''[[OneManArmy one-hundred]]'' opponents at once. Oenomaus was the only opponent who ''survived'' a match, and that was only because he lasted so long that the crowd called for him to live. Spartacus and Crixus managing to defeat him is considered an in-universe CrowningMomentOfAwesome.
** This example works on both sides, as Theokoles's sole reason to accept the fight in the first place was for the glory of beating Crixus, [[RedBaron The Undefeated Gaul]].
* Lancelot defeats the unbeaten Arthur in ''Series/{{Merlin}}'' by feigning defeat and then taking him by surprise.

* An important figure in the story of the Japanese hero Minamoto no Yoshitsune's life was the warrior-monk Benkei. His goal was to defeat a thousand warriors, but after 999 victories, his thousanth opponent was Yoshitsune, who bested him. Benkei [[DefeatMeansFriendship swore loyalty to Yoshitsune]], serving as his retainer and companion for two years, at which point Yoshitsune was betrayed, [[BetterToDieThanBeKilled and committed]] {{Seppuku}}. Benkei [[HeroicSacrifice died defending him]] from enemy soldiers while he did so, and [[DiedStandingUp was still standing]] and [[DefiantToTheEnd holding his weapon]] long after he had actually died from the onslaught of arrows. (Many of his foes actually thought he was a ''[[TheDreaded demon from hell.]]'', he was such a terror in battle.)

[[folder: Professional Wrestling and MMA]]
* This is a common angle in ProfessionalWrestling, where a wrestler is famous for being unbeatable, and is known as the most powerful wrestler of them all until that one {{Face}} can eventually defeat them.
** An old and famous example of this type of [[TheGimmick gimmick]] is Wrestling/AndreTheGiant (whose final "beaten" angle closed out his long career), and a few newer wrestler who got their start this way are Wrestling/TheUndertaker, Wrestling/{{Boogeyman}}, and The Great Khali (who is still relatively unstoppable even after being defeated). An older example would be Wrestling/HaystacksCalhoun, who does have a losing record, far as the recovered records show, against a handful of wrestlers but for the most part had TheGimmick of a traveling baby face enforcer who'd draw some interest to the territory, win some matches and be on his way.
** Nearly every Japanese promotion has one such "undefeatable" wrestler, referred to as the "ace." Aces range in {{Kayfabe}} ability from the relatively beatable Wrestling/ManamiToyota of [[Wrestling/AllJapanWomensProWrestling Zenjo]] or Wrestling/HiroshiTanahashi of Wrestling/{{N|ewJapanProWrestling}}JPW to the almost never losing one on one in his home promotion but not always winning there in TagTeam matches or due to time limit draws Wrestling/{{Rikidozan}} to the staggering, unbeatable might of [[Wrestling/ProWrestlingNOAH NOAH]]'s Wrestling/KentaKobashi. Wrestling/{{All Japan|ProWrestling}}'s then NOAH's Wrestling/MitsuharuMisawa was probably Japan's most consistently unbeatable wrestler - during any given year, Misawa's pinfall losses could be counted on one hand.
*** This trope was particularly noticeable in 80s WWF, where every new big bad {{heel}} destroyed everyone in his path until they finally got a shot at Wrestling/HulkHogan who took them down with his {{Five Moves Of Doom}}. Hercules Hernandez, Wrestling/KingKongBundy, and [[Film/NoHoldsBarred Zeus]] come to mind, but there were definitely others.
*** Wrestling/{{Vader}} was also an example of this in early '90s Wrestling/{{WCW}}, with faces lining up to take him down -- and all failing, until Wrestling/{{Sting}} came along.
** Wrestling/TheUndertaker had a perfect 21-0 winning streak at ''Wrestling/{{WrestleMania}}'', and his upcoming Wrestlemania opponents (most recently, [[Wrestling/CMPunk CM Punk]]) would often [[TemptingFate talk about how they will become legends by ending said streak]]; [[Wrestling/JohnBradshawLayfield JBL]] once mentioned (prior to losing the opportunity to even face Taker) that ending the streak would be a bigger accomplishment than winning a world title. Then came Wrestlemania XXX, and the streak finally ended at the hands of Wrestling/BrockLesnar, thus leaving the record at 21-''1''.
*** Wrestling/{{Goldberg}} was also given one of the biggest streaks in Wrestling/{{WCW}} history, starting from his introductory match as a {{Jobber}} against Wrestling/HughMorrus, going all the way to defeating [[Wrestling/HulkHogan Hollywood Hogan]] for the title. His ''173 match'' winning streak was finally ended by Wrestling/KevinNash, with the aid of [[ExecutiveMeddling his newly obtained booking superpowers]] and a taser by Wrestling/ScottHall.
*** Wrestling/SamoaJoe's twenty one month reign as Wrestling/RingOfHonor Champion where he traveled around in between his obligated ROH dates challenging anyone to try and take to the belt so he could use their defeats to justify calling it a world title. He was eventually toppled by Wrestling/AustinAries of Generation Next. Joe would later go on a much less dramatic 18 month undefeated streak that nonetheless produced Wrestling/{{TNA}} most financially successful program ever when it was broken by Wrestling/KurtAngle.
*** Nothing could beat Wrestling/{{Umaga}}. Not Viscera, not Wrestling/JohnCena, not Wrestling/JeffHardy, not Wrestling/{{Kane}}, not even [[Wrestling/{{DGenerationX}} [=DeGeneration=] X]]. It got to the point his manager, Armando Estrada, began to refer to Umaga as "The Undefeated". It finally took having Wrestling/JohnCena using a [[FinishingMove STFU]] with the detached ''ring ropes'' to defeat him.
** The first match Wrestling/MsChif's best known for her two year reign with both the Wrestling/{{N|ationalWrestlingAlliance}}WA World Women's and Wrestling/{{SHIMMER}} Title belts. Particularly when Madison Eagles beating her for the latter resulted in Eagles being the first woman not working for a major ''and'' the first not based in North America to place on top of Pro Wrestling Illustrated's top fifty.
** Wrestling/TheShield were never pinned/submitted in trios matches for seven months until finally bested by Wrestling/TeamHellNo and Wrestling/RandyOrton in June 2013, upon which Lilian Garcia announced their first ever clean loss on the microphone.
* Not at all an unheard story in [[UsefulNotes/MixedMartialArts MMA]], although all-around badass Fedor Emelianenko has had the most success at remaining undefeated, with a record of 31-1-1, the loss coming from a controversial stoppage due to a cut on his head and the no-contest from an accidental headbutt.
** Unfortunately, the other side is that in a rematch the former "undefeatable" may show that the loss or draw was actually a fluke, leading to an unfortunate CurbStompBattle. Cases in point: Matt Serra against Georges St-Pierre, Tsuyoshi Kousaka against Fedor (the cut loss), and Antonio Rodrigo Nogueira (the accidental headbutt no contest).
** Pretty much Mauricio "Shogun" Rua's claim to fame in the modern UFC: after two poor first performances in the company he showed renewed form in knocking down Chuck Liddell and slugging him out in the fist round, then gave the ''performance of a lifetime'' against legend-in-the-making UFC light heavyweight champion Lyoto Machida, only to lose the highly controversial decision that almost everyone except the judges thought was Shogun's. [[spoiler:He then goes on to knock out Machida in the first round in their rematch, winning the Light-Heavyweight title.]]
** Frankie "The Answer" Edgar recently took the UFC lightweight belt from the previously considered "unbeatable" B.J. Penn at UFC 112. Penn hadn't lost in the lightweight division in ''eight years'', but Edgar managed to upset the champ with a set gameplan; mixing up his offense, and pushing the pace with his speed.
** It eventually happened to aforementioned Fedor Emelianenko after he received his first legitimate loss to Fabricio Werdum. Werdum was understandably excited.
*** It happened again the fight after that, with Antonio "bigfoot" Silva dominating him and beating him by TKO.
** Most recently, Chris Weidman knocking out [[BoringInvincibleHero Anderson Silva]], who had a 17 fight winning streak, with his last loss being a DQ.
** It happened again in May of 2014: UFC Bantamweight Champion Renan Barao had not lost a professional fight since his very first one in 2005 and had been either Interim or Undisputed Bantamweight Champion since July of 2012. Then came unheralded underdog TJ Dillashaw, who proceeded to not only defeat Barao but thoroughly dominate him through the first four rounds before TKOing him in the fifth to take the title.
** UFC 193 on November 14, 2015 saw what most fans and experts considered the impossible: The defeat of "Rowdy" Creator/RondaRousey. 20-1 underdog and former pro boxer Holly Holm would shock the world by dominating Rousey en route to a shocking second round KO, becoming only the second person to win the UFC Women's Bantamweight Championship and handing Rousey her first MMA loss.
** UFC 194 just under a month later possibly topped Rousey's loss with the long-awaited Featherweight title unification bout between Jose Aldo and Conor McGregor. The fight had five months of hype behind it, it had an added stipulation that the winner would join Ronda Rousey on the box for the next game, and both men had long, ostentatious entrances. The fight? It lasted ''thirteen seconds'', with McGregor knocking Aldo out with the first punch of the fight.
** Unfortunately for McGregor, it happened to him as well: at UFC 196, he moved up to welterweight for a sort-notice, non-title fight against Nate Diaz. McGregor did well enough in the first round but suddenly tired in the second, allowing major underdog Diaz to force him to tap out to a rear naked choke, handing McGregor his first loss in some time and first in the UFC. Earlier, the aforementioned Holly Holm suffered her first pro loss at the hands of another massive underdog: two-time Rousey victim Miesha Tate, who choked Holm out to win the Women's Bantamweight title.
** Luke Rockhold had not lost in the UFC since his debut against a PED-aided Vitor Belfort. Since then, he had gone on a tear, finishing opponent after opponent, including taking the Middleweight belt from the aforementioned Chris Weidman in 2015, prompting many to proclaim him the true successor to Anderson Silva atop the divisional throne.. His first title defense was against short notice replacement Michael "The Count" Bisping, who had been submitted by Rockhold almost two years earlier. The heavy underdog Bisping would exact his revenge by KOing Rockhold to win the title in the first round.

* ''Roleplay/DestroyTheGodmodder'': The godmodder is well defined here, despite being able to take down things like massive battle fleets and Chuck Norris himself with minimal effort, the godmodder has already been defeated once.

[[folder: Tabletop Games]]
* ''{{Exalted}}'' is all about doing this to the extremely powerful people you don't like. You can even do this to The Unconquered Sun. Unconquered does not mean Unconquerable.

[[folder: Video Games]]
* In ''Franchise/StreetFighter'', this role is filled by Sagat in [[VideoGame/StreetFighter the first game]], The King of Muay Thai (alternatively, the God or Emperor of Muay Thai), who, at the end of the game, is eventually defeated by Ryu, and, afterwards, loses his entire reputation, joins the BigBad's organization, and, after a little soul searching, does a HeelFaceTurn and focuses on becoming stronger. Storyline-wise, he's still one of the most powerful characters in the game, and he's only lost three times, and each time he technically didn't lose giving his all (the first time, Ryu was consumed by his desire to win, [[TheCorruption briefly losing himself to]] [[TheDarkSide Satsui no Hadou]] and sucker punching Sagat with a [[DangerousForbiddenTechnique Metsu Shoryuken]], which is how Sagat has that scar across his chest, and the other two times he either was too distraught to give his all [[note]]his fight against his former disciple Adon; Sagat, despite losing, was in such a blind rage that he put Adon in traction for ''several months''[[/note]], or let the opponent win [[note]]his fight against Dan; Dan's desire to [[YouKilledMyFather avenge his father Go's death years ago at Sagat's hands]] was a big factor in Sagat's HeelRealization and eventual HeelFaceTurn[[/note]]).
** Gameplay wise, he has consistently been top tier in every appearance, to the point that many fans have labeled it either a "tradition" or a "running gag" for Capcom.
** Akuma has also only been "defeated" once, by Gouken in his youth. He would later turn up for a rematch in which he killed Gouken ([[ConvenientComa well, not quite]]), and hasn't outright lost a match since (he has, however, forfeited against people who have potential to get stronger if he leaves them alive, since his honour code won't let him fight people who aren't at their strongest).
*** Speculation has it that Akuma ''did'' lose to a NotQuiteDead Gouken upon their reunion in ''[[VideoGame/StreetFighterIV IV]]'' (given that Gouken ''{{No Sell}}ed'' the [[DangerousForbiddenTechnique Shun Goku Satsu]] with the Power of Nothingness), which is why he no longer hounds Ryu by the time of ''[[VideoGame/StreetFighterIII III]]''.
* This is a large part of the main plot of the first ''Franchise/MortalKombat game''. Goro had dominated the competition for centuries prior, and was a seemingly unstoppable force, and defeating him was a vital step in paving the way for Shao Kahn's defeat.
* In ''VideoGame/BlazBlue'' we have an interesting variation of this trope: How do you beat a supercomputer with three omniscient minds that has manipulated the countless {{Groundhog Day Loop}}s the world has gone through to its own perfectionistic ends in [[XanatosSpeedChess a game]] [[CosmicChessGame of chess]]? Believe it or not, [[FauxAffablyEvil Hazama]][=/=][[EvilGenius Terumi]] [[CrazyPrepared Yuuki]] knew how to cheat his way to victory, and we, the players, are left to ask ourselves: Why him? Why, of all people, ''him''? Why, of all the possible outcomes, did ''[[BigBad HE]]'', [[SatanicArchetype the embodiment]] of the [[OmnicidalManiac worst possible outcome]], have to win the Continuum Shift? Why? Because he ensured that there was no other possible outcome aside from his victory.
* The Elite Four fill this role in every ''Franchise/{{Pokemon}}'' game (as well as the anime), while Red, the protagonist from the first game, fills this role somewhat in the game in which he appeared as a boss.
** Giovanni from the Special Manga fits this trope extremely well, as it is said that no one has ever defeated him in his time as a gym leader. The Elite Four in the Kanto Arc also fit this trope as they are constantly called undefeated more so than in the games. The Legendary Pokemon in the anime and games are constantly implied to be undefeated as well. And then we have Pikachu.
*** Giovanni is even ''stronger'' in the ''Anime/PokemonOrigins'' special. How strong is he? In their first battle, his Nidoqueen (not his most powerful Pokemon) trounces Red's Charizard with barely an effort. In the following battle at the gym, [[spoiler: Giovanni decides to use his two strongest Pokemon against Red's team made specifically to take on the invincible Ground-type gym leader, and ''the first one, Rhyhorn takes down four of them before being eliminated in a DoubleKnockout'' (said opponents were a Victreebel, a Kabutops, a Snorlax, a Jolteon ([[{{Irony}} taken down by a single electric attack]]), and an Hitmonlee). Then Charizard, now stronger, faced Rhydon, and managed to scrape a victory]].
** Volkner has this reputation as a gym leader. It doesn't translate very well to the anime, though, considering the regional conference typically requires its entrants to defeat the gym leaders to make it in. And that's before he got bored of crushing everyone's dreams and started giving away his badges for free.
* Falling somewhere between VideoGames and RealLife is the defeat of Kerafyrm the Sleeper in ''VideoGame/EverQuest''. Having never intended gamers to challenge it, the programmers gave Kerafyrm 10 billion HP (for reference, a standard dragon has 100 thousand and gods top out at 2 million). It took almost 200 of the best players in the game over four hours to kill it. On the second try.
** The first try ended at 27% life when Kerafyrm disappeared. Sony reset the entire scenario. According to them, they thought the scenario was bugged because Kerafyrm wasn't supposed to be that close to death ever. Gamers called them out for their repeated lies.
* In the original ''KnightsOfTheOldRepublic'', you can rise all the way up in the gladiatorial ladder on Taris, eventually, defeating and killing the undefeated champion who killed every challenger in the last decades, so that nobody dares to challenge him any more.
* The Ravager is the undisputed champion of the arena in ''VideoGame/JadeEmpire''... he gets a lot of hype, and it's all freaking justified. The bastard is the second/third hardest fight in the game.
* In ''VideoGame/TheElderScrollsIVOblivion'', in a similar subplot, you can defeat the Gray Prince, the undefeated Grand Champion of Cyrodiil Arena. However, there is also a subquest that allows you to kill him without any fight and claim the title...
** In ''VideoGame/TheElderScrollsVSkyrim'', Alduin is supposed to be unbeatable. The best the old heroes of Skyrim could do is cast him forward in time, and even when the Dragonborn kills him, Alduin's is the one dragonsoul the Dragonborn doesn't absorb upon death.
* The Gear fighting champion Rico in ''VideoGame/{{Xenogears}}''.
** In addition, the whole point of the game is to kill [[spoiler: ''God.'' Well, ''technically,'' [[MindScrew it's a superpowered war machine that happens to fulfill the typical purposes of 'God' for the planet the game takes place on....]] yeah, [[{{Understatement}} it's a little confusing.]] Still, the fact that it's not ''technically'' a god doesn't make the task any easier.]]
* Not a fighting series, but the ''Franchise/AceAttorney'' series has this with prosecutors with perfect conviction records, at least in the Phoenix Wright era. Combined with the fact some of them were a bit [[AmoralAttorney obsessed with getting the defendant guilty]], it made winning the client's freedom that much sweeter. Subverted one time, when Godot announces that he's never lost a case... and then reveals that that's because he's never prosecuted a case before.
* From ''VideoGame/{{Iji}}'', Annihilator Iosa, who is known as "Iosa the Invincible" for surviving a [[ApocalypseHow Planetary Extinction event]].
* In ''VideoGame/ArmoredCore'' games, Nineball is known for having held the position of #1 pilot the longest, thus those who can beat him are famed as "Ninebreakers".
** The arena champion from Armored Core 3, Ace, reached his position without suffering a single loss.
* [[NamesToRunAwayFromReallyFast Crawmerax the Invincible]] from ''VideoGame/{{Borderlands}}''. The mission for beating him is called [[LampshadeHanging "You. Will. Die."]] and the achievement earned for putting him down is called "Vincible". ''VideoGame/Borderlands2'' and ''VideoGame/BorderlandsThePreSequel'' keep up the ThemeNaming for their raid bosses, including [[DepartmentOfRedundancyDepartment the Invincible Son of Crawmerax the Invincible]].
** In ''VideoGame/Borderlands2'' everyone is really impressed when you go toe-to-toe with Jack's [[TheBrute Brute]], Wilhelm, and come out not just alive but victorious, possibly solo, given that Wilhelm had previously taken on the four original Vault Hunters and forced them to RunOrDie. [[spoiler:In cut audio, it turns out he went down so easily because Jack poisoned him as part of a greater plan.]]
* ''Franchise/MassEffect'' presents [[OmnicidalManiac the Reapers]] as undefeatable. They've spent countless millions of years wiping out all advanced organic life in the galaxy [[ViciousCycle every 50,000 years]]. Finally, [[spoiler: at the end of ''VideoGame/MassEffect3'', [[PlayerCharacter Commander Shepard]] ends their reign [[PyrrhicVictory at great cost]]. [[GainaxEnding ...we think]].]]
* In ''VideoGame/AsurasWrath'', the Seven Deities are repeatedly described as undefeatable gods. Well, Asura puts them to the test on his RoaringRampageOfRevenge....and finds them wanting. Shortly afterward, he goes up against [[spoiler: Ghoma Vlitra]], which is described as a force so powerful it cannot be killed, only subdued temporarily. No prizes for guessing what Asura does to it. Finally, the game's last, DLC-specific chapters, culminate in Asura fighting [[spoiler: Chakravatin, who is effectively {{God}}, and is so powerful that his supreme fortress is literally larger than entire galaxies and he uses stars and planets as projectiles.]] Three guesses what happens to ''that'' theoretically indestructable asshole.
* In ''Franchise/{{Shin Megami Tensei}}'' games, this happens ''a lot'', as you will be seeing yourself defeating many seemingly undefeatable creatures in various myths and religion. Your enemy in this game can range from a simple fairy to out-and-out '''[[TheOmnipotent OMNIPOTENT]] [[EvenMoreOmnipotent GODS]]''', and you can win against them, storyline and gameplay-wise. The games go to great lengths [[NintendoHard to make sure you will be defeated a lot, though]], and some games do not permit this.
* ''Videogame/BioShockInfinite'' goes to a great deal of effort to emphasize how invincible Songbird is. Elizabeth refuses to even let Booker fight him, insisting that it would be a completely hopeless fight. In the end, [[spoiler:[[SubvertedTrope she's right]]. It's a deconstruction of the standard player expectations when hearing about an invincible enemy. When Elizabeth says "You can't beat Songbird," the game isn't setting up an awesome boss fight, it's setting up the fact that ''you can't beat Songbird''. Elizabeth does eventually kill him in a cutscene though, but only after her PowerLimiter has been destroyed and she's basically a PhysicalGod]].
* In ''VideoGame/EmeraldCityConfidential'', Petra defeats Mombi, the resident champion of the wizard arena. Mombi, who is a SoreLoser, calls Petra out after the match for using parlor tricks rather than just magic to win.
* In ''Manga/WanganMidnight Maximum Tune'', you get special titles for defeating a player with a long-enough win streak.
* The final fight in the ''VideoGame/PunchOut'' series is about defeating the undefeatable.
** In ''Mike Tyson's Punch-Out!!'' on the NES did this by making the final opponent Mike Tyson, who was undefeated at the time the game was made.
** In ''Super Punchout'', Nick Bruiser has a 42-0 record. His twin brother Rick is almost undefeated, having lost to Nick.
** ''VideoGame/PunchOut'' for the Wii does this for the FinalBoss Mr. Sandman. Not only does he have a whooping 31 wins - 0 losses record, but his introduction cutscene shows him knocking out every other boxer in the game like it was nothing.
* ''Punch-Out!!'' clone ''Super KO Boxing 2'' takes this UpToEleven by making KO Kid fight the Executioner, a menacing fighter out of Portugal, who has a 1000-0 record. Only one managed to escape his [=KOing=] wrath.
** For reference, Executioner single-handedly dwarfs the experience and win record of all 16 boxers in the SNES Super Punch-Out!!
* In ''VideoGame/YuGiOhCapsuleMonsterColiseum'', losing to Yugi's friends makes them incredulous that they actually won.
-->'''Tea:''' I won! I canít believe it! ''I actually beat Yugi!''\\
'''Joey:''' Yugi, I won, but Iím sure it was just luck. A miracle, even.
* In ''VideoGame/YuGiOhDuelLinks'', Yami Yugi and Kaiba can lose to anyone in the game, leaving their opponents incredulous that they won.
* ''VideoGame/FiveNightsAtFreddys'' has a meta example. The game's version of HarderThanHard, [[FanNickname 4[=/=]20 Mode]] (accessed by using [[LevelEditor Custom Night]] to set all animatronics to their highest difficulty), is [[NintendoHard extremely brutal]] to the point where Scott Cawthon, the developer, thought it was flat-out impossible. Then Let's Player [=BigBug=] went and beat it. As of now, 27 people have done so and been able to prove it.

[[folder: Web Comics]]
* Bun-Bun is like this throughout ''Webcomic/SluggyFreelance''. The main characters seem confident he can beat just about anyone or anything, including immortal assassins and world-destroying demons. He gets beaten a few times over the comcic's run however.
* Old Man Death in ''Webcomic/GirlGenius'', a BadassNormal human [[RetiredBadass who used to ride]] with the BloodKnight [[SuperSoldier Jagers]] and never lost a fight. Due to his reputation, Jagers constantly try to defeat him for his NiceHat, but never managed to do it even in his old age. He finally lost the hat when Maxim challenged him for it, and even then, Maxim only succeeded by being "sottle", [[spoiler:ordering a hat sandwich to go, forcing Old Man Death to prepare the hat and hand it to Maxim lest the old man risk his reputation as the SupremeChef of his gourmet sandwich shop]].
* The Arena Champion in ''Webcomic/TheOrderOfTheStick'', who has a perfect win record and has killed 37 gladiators in a row, including a stone giant with PC Class Levels. Naturally, Roy has to try to beat him in a death match, [[spoiler:a chance that he looks forward to when he learns that the Arena Champion is [[PsychopathicManchild Thog]]]].

[[folder:Western Animation]]
* Warhak, the villain from the GrandFinale of ''WesternAnimation/KimPossible'', claimed to be 'the most fierce warrior in the galaxy', indicating that he had conquered hundreds of planets with little resistance. He even managed to knock out both Kim and ''Shego'' with a single punch. In the end, both he and his battlemate Warmonga[[note]]who herself had proven tough enough to take on both Kim and Shego (while the former was wearing her battlesuit), and was defeated by [[SnipeHunt trickery rather than combat]] in her previous appearance[[/note]] were destroyed by Ron when he called upon his Mystical Monkey Power.
* In season 3 of ''WesternAnimation/TheLegendOfKorra'', the four active members of the Red Lotus are described as undefeatable, with no single person having a chance of defeating any of them individually, much less the four of them together. However, Tenzin actually comes close to proving this wrong in his one-on-one battle with their leader Zaheer, as he seems to have the upper hand thanks to his years of experience and mastery bending air outmatching Zaheer's skilled but inexperienced style, but Zaheer's reinforcements show up before the battle is over.
** In the finale, [[spoiler:Mako]] actually does manage to defeat one of them, [[spoiler:Ming-Hua]], in single combat, through [[spoiler:using his lightning to electrocute her, taking advantage of the fact that she was submersed in the water she used for her own bending]].

[[folder: Real Life]]
* Tiger Woods was 14-0 in golf's four major championships when he held the lead (by himself or with others) after 54 of 72 regulation holes...but that came to a stunning end when he lost the 2009 PGA Championship with a two stroke 54 hole lead to unheralded Y.E. Yang. And then three months later Tiger crashed into a fire hydrant outside his home in Florida, and the rest has been history.
* Mike Tyson was the undisputed heavyweight boxing champion who was mowing down everyone who came into his path, including previously unbeaten champions like Michael Spinks...in 91 seconds. James "Buster" Douglas was supposed to be just another speed bump to the champ (in fact, the February 1990 fight was held in Tokyo because no American venue would have it). No one told Douglas, though, who proceeded to knock out Tyson in the 10th round and become one of the unlikeliest heavyweight champions in boxing history.
* The [[http://en.wikipedia.org/wiki/Miracle_on_Ice Miracle on Ice]], where the USA ice hockey team of the 1980 Winter Olympics manage to defeat a Soviet team that was nigh-unbeatable in the world scene for more than a decade. For bonus points, the USA team was made up of collegiate ice hockey players and had been crushed by the Soviets in an earlier exhibition game 10 to 3. "Do you believe in miracles?"
* The "Miracle of Berne" (4 July, 1954) in which the West German team came back from trailing 0-2 against the "Magical Magyars" to win [[TheWorldCup the FIFA World Cup]] by 3 goals to 2. This ended an undefeated run by the Hungarian [[UsefulNotes/AssociationFootball football (soccer)]] team lasting four years and 32 matches, during which they won the Olympic gold medal in 1952, the 1953 European Cup of National Teams (precursor of the UEFA European Championship), became the first continental European team to defeat England in Wembley Stadium (by 6-3) and defeated West Germany by 8-3 in the opening round of the 1954 World Cup.
* [[UsefulNotes/{{Tennis}} Tennis]] star Rafael Nadal entered the 2009 French Open as the World No. 1 and 4-time defending champion who had never been beaten on French clay ever since his debut at the 2005 French Open, not even by the legendary Roger Federer, and had just set a record streak of 31 wins at the French Open. His fourth-round opponent, Robin Soderling, was all set up to become yet another one of his conquests as the 23rd seed who had never even reached the quarterfinals of a major tournament before and had been steamrolled by Nadal in all of their previous matches. Soderling apparently hadn't read the script, however, as he proceeded to turn in the game of his life and defeat Nadal in one of the biggest upsets in tennis history.
** And it happened to Nadal ''again'' at Wimbledon 2014. Back at number 1 in the world and the current French Open and US Open Champion and runner-up at the Australian Open, he played Nick Kyrgios, a 19 year old Australian ranked 145th in the world, in the fourth round. Nadal was defeated in four sets.
* A literal example in the 2007 SuperBowl match between the New England Patriots and the New York Giants. The Patriots had an undefeated regular and playoff season. They seem to have the best offense and defense ever assembled in NFL history, or so the many sports commentators kept saying.. Superstar quarterback Tom Brady completed 50 touchdowns throughout the season, running up the score and completely dominating most defenses he faced. The whole country believed they'd be the second team besides the 1972 Miami Dolphins to have an undefeated NFL season, complete with a Super Bowl victory. At the same time, the New York Giants had an up and down season. There were times when the fans demanded that the managers fire coach Tom Coughlin and replace quarterback Eli Manning, whom many football fans regarded as not being as talented as his older brother Peyton Manning. However they fought and clawed their way to the playoffs and the Super Bowl game. During the game, millions who watched were in shock as not only did the Giants stop the Patriots dominating offense, but they were able to only hold them to 14 points, winning the game. Eli finally escaped from his brother's shadow by matching him with a Super Bowl win, and Tom Coughlin had his coaching contract extended. And just to show the win wasn't a fluke, they beat the Patriots again in the Super Bowl at the end of the 2011 season, and Eli Manning surpassed his brother with two Super Bowl wins (until Peyton won his secnd ring at the end of the 2015 season).
* When chess grandmaster Jose Capablanca was defeated by fellow grandmaster Richard Reti in the 1924 grandmaster tournament in New York, it was his first loss under tournament conditions in ''eight years''.
* In a way, the Miami Heat vs the San Antonio Spurs in 2013. Up until that point, the Spurs never lost in the NBA Finals; they never even ''trailed'' in a Finals series. They were up 1-0, 2-1, 3-2, and were literally 28 seconds away from winning their fifth championship... and then the Heat improbably forced overtime in Game 6, took that game by the slimmest of margins, and proceeded to defeat the Spurs in Game 7, becoming the only team to have beaten the Spurs in the Finals. This is especially poignant since the Spurs proceeded to defeat the heat in the Finals in 2014.
* Rulon Gardner winning the gold medal in Greco-Roman wrestling in overtime, against Aleksandr Karelin at the Sydney Olympics in 2000. Until that victory, Karelin had been undefeated for ''13 years'' (out of a 18 year-long career), the last 6 years during which he '''didn't give up a single point to his opponents'''.
* Serena Williams went into the 2015 US Open having won the last four tennis majors and being the overwhelming favorite to complete a calendar-year Grand Slam (i.e. winning all four tennis majors in a single year). Everything seemed to align for her in the semifinals with her opponent being 43th-ranked Roberta Vinci who had a 0-4 record against her and Flavia Pennetta taking out 2nd-seeded Simona Halep in the other semifinal...then Vinci ''won'' in one of the biggest sports upsets of all time.