Our hero is really in a pickle this time. The latest villain uses a unique weapon, technique or tactic which beats anything else the hero can do. So how does the hero get out of this? By using the same tactic himself!

Some authors, especially video game designers, like to have their hero use a villain's own methods against him. This could be due to the reason stated above: because the only option the hero has to counter said tactic is the tactic itself. Other times, it might be an honor thing. Or things could have just turned out that way. Whatever the reason, equally matched fights are cool.

Perhaps this is so popular in video games because it allows for variety in gameplay. In fact, many a FisticuffsBoss fight is against a similarly unarmed opponent. When the enemy's fighting style is radically different from the hero's typical style, this can be an UnexpectedGameplayChange.

[[MirrorBoss Villains can use this tactic, too]]. It's sometimes cited as a reason for creating an EvilKnockoff of the hero. PlayingTennisWithTheBoss is arguably a sub-trope of this.

Compare FaustianRebellion, where the villains really should be ''in charge'' of the game, yet are at risk. Also compare HoistByHisOwnPetard, which is where villains are defeated by their own weapon or plot, but not necessarily by a hero. See also ATasteOfTheirOwnMedicine, which is a type of {{Revenge}}.

----
!!Examples

[[foldercontrol]]

[[folder:Anime]]
* ''Manga/BeetTheVandelBuster'' could fight effectively against the gun-wielding Frausky only after he had learned how to properly use his own gunlike EmpathicWeapon, as opposed to his other four {{Empathic Weapon}}s, which are all melee.
* The main crew of ''Manga/OnePiece'' tend to fight against similarly skilled members of every QuirkyMinibossSquad they encounter: Zoro fights other swordsmen, Sanji fights martial artists and Usopp fights projectile users, while Luffy inevitably ends up going after the BigBad for that group.
** Lampshaded in one fight where Sanji matches up with a swordsman while Zoro finds himself squaring off with a martial artist.
*** Typically they fight similar opponents intentionally. Zoro for example wants to be the greatest swordsmen in the world, so fighting other swordsmen is a bit important for that goal.
** The Straw Hat crew was challenged to a Davy Back Fight, where a pirate crew challenges another crew to a series of games with crew members as the prize. The Foxy Pirates used several underhand tricks to get the advantage but the Straw Hats naturally beat them.
** The [=CP9=], confident in their abilities, made a game out of rescuing Robin where they divided five keys among them (one which unlocked Robin's cuffs) and had the Straw Hats scramble to defeat them and find the right one before Robin was permanently taken away.
* Frequently used in ''RanmaOneHalf'', but notably subverted and then averted when Ryoga learns the Shi Shi Hokodan technique. After being devastated by the technique, Ranma attempts to master it, but this proves impossible, as the Shi Shi Hokodan is powered by depression, and Ranma (despite all circumstances) is a pretty happy fellow compared to Ryoga, and certainly can't hope to match his misfortunes. Instead, he resorts to mastering a variant powered by his ''confidence''. This works for a time, but Ryouga -- helped along by the depression of having his technique thwarted -- then uses the ''Perfect'' Shi Shi Hokodan. It's fueled by a level of absolute depression for which Ranma can't muster an equal amount of confidence, especially once Ranma starts losing. In the end, Ranma achieves victory by finding a way to turn Ryouga's own attack against him.
* ''BoboboboBobobo'' is quite fond of using parodies of his enemies' attacks.
* The ''Manga/{{Naruto}}'' character Kakashi Hatake is known as the "Copy-Ninja" for his ability to flawlessly copy an enemy's moves, using his Sharingan eye, ''even as they are performing them''.
** In one instance, the ninja he was copying was so surprised by Kakashi's perfect move for move copy that he stopped cold in the middle of his sharingan. ''[[CrowningMomentOfAwesome Kakashi continued anyway and completed it despite having never seen it.]]''
* In an episode of ''[[SuzumiyaHaruhi The Melancholy of Haruhi Suzumiya]]'', the SOS Brigade are challenged by the Computer Society at a video game of the latter's own design to keep their computer (and their EmotionlessGirl, thanks to Haruhi's tendency to treat brigade members like property.) The SOS Brigade ends up winning in spite of only having a week of practice, having a strategic moron for a leader, and [[TheComputerIsACheatingBastard rampant cheating on the part of the Computer Society]].
** Straight example since it took rampant cheating on the part of the EmotionlessGirl for them to win.
*** Technically, she didn't cheat. The only thing she did that wasn't within the rules of the game was to turn off the computer club's cheat.
* During the Kyoto StoryArc in ''RurouniKenshin'', Saitou challenges Sanosuke to hand-to-hand combat (the latter's specialty), even going so far as to suspend [[CombatPragmatist fighting dirty]], in order to prove that Sano isn't on his or Kenshin's level (and consequently, a liability in the coming battles). Needless to say, it was a NoHoldsBarredBeatdown, and not in Sano's favor.
* The favored method of the D'arby Bros. in ''Manga/JoJosBizarreAdventure'' is to force the heroes to play an innocuous game (poker, a video game, or Rock-Paper-Scissors) and then cheat like hell at it to win (since, according to them, it isn't cheating if you don't get caught). Naturally, the heroes have to cheat right back while catching the D'arbys in the midst of their own cheating. The results were... [[VillainousBreakdown memorable.]]
* The Virtual Nightmare Arc in ''Anime/YuGiOh'' was nearly an entire storyline devoted to this Trope. The Big 5 thought to defeat the heroes by dueling them with the Deckmaster System, a special set of HouseRules that they thought would give them an advantage. To their dismay - and horror - the heroes adjusted to this system ''very'' quickly, and in every duel the Deckmasters played a role in the villain's defeat. (Even in Yugi's duel against Noah, where Yugi was using Kaiba's Deckmaster, which wasn't of any use to him, Yugi nearly defeated Noah after the villain carelessly summoned ''his'' Deckmaster. Noah only escaped defeat (''that'' turn) because [[ScrewTheRulesIMakeThem he could pretty much give Shinato any effect he wanted]] ''whenever'' he wanted.
* Yugi was also able to beat Duke Devlin at ''Dungeon Dice Monsters'' by adapting to Duke's game rather easily, but a lot of that [[HoistByHisOwnPetard was Duke's fault]]; he had made the DDM version of Dark Magician, [[TheAce Yugi's favorite card]], ''very'' powerful and very similar to the one Yugi was familiar with. Yugi couldn't help but ''thank'' him for creating such a faithful adaptation of his best card before scoring the winning move.
* In Anime/YuGiOhGX, Judai manages to defeat a deck destruction expert by deck out. He also beats a guy using a quiz deck with a quiz of his own.
* In ''Anime/YuGiOhZEXAL'', Tron's entire strategy revolved around this. His two Numbers (Number 8: Heraldic King Genom-Heritage and the even stronger Number 69: Heraldry God - Coat of Arms) could both steal the effects and even the names of opposing monsters, using them themselves and leaving the opposing monsters powerless. (Thankfully, the RealLife versions of these cards are ''far'' less potent.)
* This is the tactic employed by the [[AntiVillain Anti-Spiral]] in ''Anime/TengenToppaGurrenLagann'' - whenever the protagonists get a bigger mecha, they field an equally big one to try and instil despair into the protagonists in order to dampen their [[HotBlooded hot blood]] powered Spiral Energy.
* When Kenshiro fights Shu in ''Manga/FistOfTheNorthStar'', he managed to defeat him through a secret Hokuto Shinken technique that allows him to emulate Nanto Seiken.
** During his battle with Raoh, Toki artificially increases his strength to use his opponent's fighting style. Unfortunately he doesn't succeed.
* In ''MagicalGirlLyricalNanohaStrikerS'' Nanoha defeats Teana using her own attack, Crossfire. She gets even in ''Manga/ViVid'': during a 5-on-5 mock battle Nanoha and Teana use Starlight Breaker against each other, defeating most of their opponents in the process; in the end, Nanoha is shot down by her own trademark spell, while Teana (barely) remains standing.
* In ''LightNovel/TheCircumstancesLeadingToWaltrautesMarriage'', Waltraute manages to beat Thor in a fight using lightning. He didn't take it well.
* In an episode of ''Anime/FullMetalPanicFumoffu'', Kaname is kidnapped by a gang of thugs. Sosuke's answer is to kidnap the gang leader's younger brother, and threaten her to kill him if she doesn't release Kaname. Not only that, but he also reveals that he knows a whole awful lot about the other gang members' personal belonging and loved ones, and declare it would be a ShameIfSomethingHappened to them. This does the trick marvelously well: the gang members run away in terror, and Kaname is freed. [[spoiler:Then Sosuke reveals that it was all just a trick: he actually formed this plan together with the leader's brother, saying it was an emergency. This doesn't stop the scene from being tense, as Sosuke and the kid were both damn convincing.]]
[[/folder]]

[[folder:Fan-Fic]]
* In ''[[FanFic/NewLookSeries Joe's New Look]]'' Big John tries to roast Joe by throwing flames at him. But, Joe leaps in the air and Big John's own men get burned instead.
* In ''Fanfic/TheLegendOfTotalDramaIsland'', the Eagles copy the Muskies' mass barrage tactics in the dodgeball match. It doesn't work especially well, thereby subverting the trope, because the Eagles don't realize that the Muskies are throwing [[AttackPatternAlpha organized patterns]].
* In the ''FanFic/PonyPOVSeries'', [[BadFuture Dark World]]!Twilight does this twice. First, during the Duel of Tears against [[WoobieDestroyerOfWorlds Traitor Dash]], she transforms into a pegasus and matches TD move-for-move. Then, during the FinalBattle, [[spoiler: she tricks [[TrueFinalBoss Nightmare Paradox]] into using her TimeMaster abilities so that Twilight can [[PowerCopying copy them]] and use them to take advantage of how much Paradox's GroundhogDayLoop plan has screwed up the timeline as part of a move to defeat her for good.]]
[[/folder]]

[[folder:Film]]
* The final battle of ''Franchise/PiratesOfTheCaribbean: Curse of the Black Pearl''. In order to even the odds between himself and the cursed undead pirates, Captain Jack Sparrow picks up a gold piece from the cursed treasure trove, transforming into an [[NighInvulnerability immortal]] undead pirate himself, allowing him to more easily buy time until the curse is broken and the evil pirates are rendered killable.
* ''Franchise/{{Predator}}'' franchise:
** In ''Film/{{Predator}}'', Dutch uses stealth tactics to defeat the Predator.
** In ''Film/{{Predator 2}}'', Harrigan kills the Predator with its own disc weapon.
* In ''Film/TronLegacy'', Rinzler, [[spoiler:a re-purposed Tron controlled by Clu]], [[DualWielding uses two light discs]] in combat, and is considered nearly unstoppable. Sam Flynn finally defeats him by using his father's disc in conjunction with his own.
* in ''Film/TheMatrix'', Neo and the other humans are nearly powerless in any direct confrontation with the Matrix's agents, and can only gain the upper hand through luck or the element of surprise (which is nearly impossible to obtain). Neo surprises his fellow humans by surviving a face-to-face encounter with an agent by dodging its bullets (as seen in the famous "bullet-time" scene).
-->'''Trinity''': How did you do that?
-->'''Neo''': Do what?
-->'''Trinity''': You moved like they do. I've never seen anyone move that fast.
[[/folder]]

[[folder:Literature]]
* In ''Literature/{{Animorphs}}'' [[FriendToAllLivingThings kind-hearted]] [[TheHeart Cassie]] is the one who comes up with this strategy as the way to defeat SixthRangerTraitor [[spoiler:David]].
* In ''VideoGame/{{Crysis}}: Legion'' it is speculated (and the third game confirms) that the NYC Ceph [[ContinuityDrift look different from the Lingshan Ceph]] because of trying to imitate human equipment and tactics. They do pretty well until Alcatraz returns the favour.
* In the Literature/HonorHarrington books, after repeatedly suffering losses due to Havenite deep raids, Manticore's reconstituted Eighth Fleet is tasked with doing the same right back.
[[/folder]]

[[folder:Live-Action TV]]
* Since July 2005, when the first FormulaOne driver was a guest on ''TopGear'', none had cracked [[BadassDriver the Stig's]] record in the Suzuki Liana, and notably, only one actually took the same line the Stig takes going around the track (though it's speculated that the rainy weather was what handicapped him). Then Rubens Barrichello comes on the show, takes the same line as the Stig, and ''beats his record by a tenth of a second''.
* In a championship round of ''JunkyardWars'', the Turbines stole an entire car from the Pit Crew's lot, and foiled the Crew's attempt to steal it back. This could be karma in action, as the Pit Crew had stolen some motorcycles (yes, ''several'' motorcycles) from their opponents in a previous round of the championship.
* Before Jon Stewart took over ''Series/TheDailyShow'' and Series/WinBenSteinsMoney was in its prime, Stein was given a set of five questions to answer after an interview. The questions were outrageously difficult and based on very obscure facts. (Stein, to his credit, managed to answer one correctly.)
* On ''Series/{{Heroes}}'', this is now Peter's new strategy thanks to the DiscardAndDraw ability that he regains after losing his original ability and taking the ability-granting formula.
* A non violent version of this occurs in one episode of ''Series/{{Friends}}''. After Joey moves out of Chandler's apartment, Chandler gets a new roommate that is [[SanitySlippage a bit off the loose end]] and conveniently forgets Chandler's many requests to move out. Chandler then decides to beat the guy at his own game by changing the locks on the door and having Joey move back in while pretending the crazy guy was never his roommate at all. The nut job actually falls for this and leaves.
[[/folder]]

[[folder:Professional Wrestling ]]
* Many times a wrestler will have a trademark finishing maneuver. As in the WWE game cited above, a point of drama is to use a wrestler's finisher against him/her. This only works if the move in question is unique, though; there's not as much drama if Wrestling/{{Kane}} and Wrestling/TheUndertaker trade Tombstones and chokeslams, since they both 'naturally' have them. Some of these can cross with [[HoistByHisOwnPetard/ProfessionalWrestling Hoist By His Own Petard]].
* Also in wrestling, certain characters usually have matches that are claimed to be their specialty (The Undertaker has casket and buried alive matches, [[Wrestling/MattHardy the]] [[Wrestling/JeffHardy Hardys]] are associated with ladders, Wrestling/TheDudleyBoys with tables, Kane with the Inferno Match), but generally they tend to lose those matches.
* At some point in [[Wrestling/DwayneJohnson The Rock's]] career, he began to make a habit out of hitting his opponents with their own finishers. This included giving Wrestling/TripleH a Pedigree onto a table, giving the Undertaker a chokeslam, spearing Wrestling/{{Goldberg}}, putting Wrestling/KurtAngle in the ankle lock and giving Wrestling/StoneColdSteveAustin lots and LOTS of Stunners. While he usually tried to pick up a pin after this, they pretty much always kicked out. Also, this usually meant that eventually the other wrestler would give him the Rock Bottom.
** At ''WWE Vengeance 2002'', July 21, 2002, in the [[http://www.wrestling-titles.com/wwe/wwe-h.html WWE World Heavyweight Title]] Triple Threat Match between the Undertaker (c), the Rock and Kurt Angle, Rock chokeslammed Taker, Angle gave Rock the Rock Bottom, and Taker gave Angle the Angle Slam.
* At ''Hard Justice 2008'', Kurt Angle tried to use the Styles Clash on Wrestling/AJStyles himself, only for Styles to turn it into the Angle Lock in midair and force Angle to tap out to his own finisher.
* At ''Final Resolution 2010'', Douglas Williams pinned AJ Styles after using the Styles Clash on him.
* Wrestling/{{Kane}} has always been a sadistic monster (though his character can be a NobleDemon depending on plot) that loves playing mind games and mentally tormenting his opponents. What did Wrestling/{{Edge}} do when he had to beat him for the World Heavyweight Championship? Kidnapped [[Wrestling/PaulBearer Kane's dad]] and spend the next few weeks torturing Kane in all sorts of sadistic mind games and torturing his daddy. Kane tries to call him out on it, only for {{Edge}} to remind him of how he's only doing the exact same thing Kane always does. So far, it seemed {{Edge}} has one upped Kane.
* At ''Sacrifice 2007'', Wrestling/JamesStorm tried to attack Chris Harris with his signature beer bottle, but Harris clocked him with a bottle of his own.
* Subverted hilariously when Wrestling/VickieGuerrero attempted to Spear [=Edge=]. She comically bounces off him like he was a brick wall.
* Wrestling/JushinThunderLiger once used Asian Mist on its most famous user, Wrestling/TheGreatMuta.
[[/folder]]

[[folder:Tabletop Games]]
* {{Averted}} in ''TabletopGame/DungeonsAndDragons'' 4E; although [[CastingAShadow Necrotic]] damage is an option, often the best weapon to fight evil with is [[TheUntwist Go]][[HolyHandGrenade od.]] Indeed, the assassin (the first [[TheDarkArts Shadow Striker]]) is widely regarded as one of the [[JokeCharacter worst classes.]]
[[/folder]]

[[folder:Video Games]]
* In ''VideoGame/MetalGearSolid'', Solid Snake has to find a sniper rifle in order to fight Sniper Wolf, who is a HopelessBossFight until you run back to find it, and you fight Revolver Ocelot early in the game when you don't have any guns heavier than a pistol. Inverted when Cyborg {{Ninja}} willingly drops his sword in order to fight you [[FisticuffsBoss hand-to-hand]], should you remove your own weapons during the fight with him.
** And VideoGame/MetalGearSolid2's final fight makes you battle Solidus with swords only. Here any use of guns is not possible.
** ''VideoGame/MetalGearSolid4'' had a sequence where you get to [[spoiler:pilot Metal Gear REX and battle Liquid Ocelot in a Metal Gear RAY]]. And it's awesome.
** With the exception of the original MGS, though, this is entirely optional for the most part, as there are several ways to beat each boss or situation. With [=MGS3=]'s The End, for example, you ''could'' fight fire with fire by sniping him, or you could sneak around and make the fight up close and personal. Or just run out the clock (although this takes several days without cheating).
** Don't forget, you can snipe him long before his actual boss fight. When he is being wheeled out at the docks, you can snipe him down easily.
*** It's optional in the first MGS as well. When you fight Sniper Wolf [[spoiler:again]] you can take cover behind an embankment and spam Nikita missiles at her.
** Inverted in the fight with Laughing Octopus in MGS 4, where [[spoiler: she will occasionally hide in a cardboard box]]
* In ''VideoGame/KingdomHeartsII'', many of Sora's Reaction Commands involve him copying the enemy's signature moves. For example, he can copy the aerial dive attack of Xaldin, and against Demyx he can challenge him to a musical duel.
** For an earlier example, look no further than [[BonusBoss Kurt Zisa]] in the first game. In its first phase it only uses physical attacks. And it locks your magic forcing ''you'' to only use physical attacks. Then its second phase uses only magic based attacks. Guess what you have to use to break his shield.
* Much of ''VideoGame/ZoneOfTheEnders: The 2nd Runner'''s plot involves acquiring the [[FlashStep Zero Shift technique]] so that the player's HumongousMecha Jehuty will be able to fight on equal footing with its EvilCounterpart, Anubis.
* Black Waltz No. 3 in ''VideoGame/FinalFantasyIX''. As his name implies, he fights with black magic, and your party includes a black mage of your own, Vivi. Black Waltz also has the ability to fly into the air, making him virtually impossible to hit with short-ranged physical attacks but still easy prey for Vivi's magic. And Vivi automatically begins the battle in [[LimitBreak Trance]] mode, allowing him to cast two spells per turn. It's obvious what you were meant to do (not that you ''have'' to, but...)
** Black Waltz No. 2, however, is a subversion. If you use Vivi's spells against him, he will taunt you and counter with a higher-level spell, handily discouraging you from "fighting fire with fire". And if you're wondering about Black Waltz No. 1... Vivi isn't in your party then.
** See also Blue Magic, in which a character can learn enemy-exclusive skills, usually via getting ''hit with it''. This includes the instant-death skills.
* When you kill TheDragon in ''{{Rune}}'', he falls into a pit of green goo, accidentally transforming into a [[OneWingedAngel super zombie]]. He realizes that he has basically beaten you and jumps over the InsurmountableWaistHeightFence you're now trapped behind; you then commit suicide by jumping into the goo and becoming a super zombie yourself.
* Meta Knight, the recurring sword-wielding WorthyOpponent from the ''{{Kirby}}'' series, usually leaves a sword in the boss arena for you to take and use against him. Originally, in ''Kirby's Adventure'', he refused to start the fight until you took it, but in ''Kirby Super Star'', he will fight you if you wait several seconds without taking it, which isn't advisable outside of the Arena due to the time limit you're given, plus the extremely low amount of ammo he creates makes defeating him without an ability extremely difficult (Though future games and remakes remedy this by making him generate stars after most attacks).
** King Dedede does the same with the Hammer power in the 'Revenge of the King' section of ''[[UpdatedRerelease Kirby Super Star Ultra]]''.
** Miracle Matter, from ''[[VideoGame/Kirby64TheCrystalShards Kirby 64]]'', uses attacks based on the 7 abilities Kirby can copy. It can only be harmed by whatever ability it is copying at the moment (or by inhaling the power-granting things it drops and spitting them out at it); its immobile default form is completely invulnerable.
* ''EternalDarkness'''s final boss involves you [[spoiler:summoning ''another'' final boss that beats it in the ElementalRockPaperScissors circle, and letting it loose. While the two gods fight, you tackle the other dude that summoned the first one.]]
* According to the Strategy Guide, it is almost impossible to defeat the final boss in ''BaldursGate 2'' without temporarily giving into your evil nature and turning into the Slayer, which the final boss also starts the fight as. It should be noted that this is rubbish, all you really need is a strong character. They seem to like the idea of you turning into the Slayer for the final boss fight though, and the game drops hints to that near the end of the game.
* Topo in ''VideoGame/BraveFencerMusashi''. When Musashi attempts to start a boss fight, she is aghast that he would consider [[WouldntHitAGirl hitting a girl]] and challenges him to a dance contest instead. Failing to copy her moves in the resulting rhythm minigame will result in being blown into an electric fence.
* ''MetroidPrime: Hunters'' and ''Metroid Prime 3: Corruption'' both feature this trope. The final boss changes the color of its [[ForMassiveDamage obvious weak point]] and its own weapon to match one of the six weapons you have at your disposal. ''Corruption'' features enemies that can enter [[QuadDamage Hyper Mode]] - the best counter being to do that yourself.
** ''Metroid Prime'' also features Space Pirates who wield copies of one of your weapons and are only vulnerable to the same weapon they use.
** Also, in ''Metroid Prime'' the fight with the Metroid Prime's exoskeleton form can only be damaged by attacking it with the weapon that corresponds to its current colour and attack pattern. What's more, Metroid Prime always needs Phazon weaponry to finish it off, which it always gives you in some way or another, be it via puddles, projectiles, or injecting you with the crap.
* Some of the more recent Wrestling/{{WWE}} {{Wrestling Game}}s allow players to "steal" their opponent's finisher with a special combination of buttons. This can get rather hilarious if, for example, the player is playing as The Big Show (who measures 213 cm and weighs an even 200 kg), and borrows Jeff Hardy's signature Swanton Bomb (which involves leaping off the top turnbuckle, flipping forward 270 degrees, and landing back-first across a prone opponent).
** Swanton Bomb nothing. Have Show or Andre the Giant steal Rey Misterio's finisher--swinging kick through the ropes, land on the apron, spring to the top rope, then fly off and land sitting on the victim's shoulders, then backflip into a pin. Tell me there isn't anything more frightening than seeing a 500-pound wrestler flying groin-first at your face.
** Or on the other side of the gamut, playing Rey Mysterio and having him do a Tombstone Piledriver on the Undertaker.
* In ''VideoGame/MegaManClassic'' games, the titular character gains the abilities of the Robot Masters that he defeats, which are typically useful against another Robot Master. However, in ''VideoGame/MegaMan2'', Metal Man is particularly weak to his own weapon; two shots on Hard mode will take him out.
** This is even more prominent in ''VideoGame/MegaMan3'', where ''every'' robot master is weak against his own weapon.
* In ''VideoGame/TakAndThePowerOfJuju'', Tak defeats Tlaloc by turning Tlaloc's sheep curse back on him.
** In ''Tak 2: Staff of Dreams'', Tlaloc uses half of the Staff of Dreams to turn into a huge purple monster with tiny bat wings. Tak counters by using his half of the staff to... turn into a huge '''blue''' monster with tiny bat wings.
* The final battle of ''[[SpyroTheDragon Spyro]] 2: Ripto's Rage'' involves competing with Ripto to gather orbs which give [[EleventhHourSuperpower special powers]] to whomever collects them.
* In ''VideoGame/ChronoTrigger'', one of the fights against Magus invokes this trope; whatever magic is used against you is the only way to successfully fight back, and it changes every few rounds. This can be confusing if you're used to playing ElementalRockPaperScissors, though the DS version helps clear it up. For all but one party combination (and that one only works after a fair bit of LevelGrinding to get Crono, Frog, and Lucca's Triple Tech), you won't be able to match one (or two) of the elements, depending on your party; hitting him physically with anyone but Frog makes him manually cycle the elements, solving that problem.
* While most ''{{Klonoa}}'' series bosses require you to throw enemies into them, the King of Sorrow from ''Klonoa 2; Lunatea's Veil'' attacks you with spiked orbs which he controls with chains of energy. To defeat him, you have to steal one of his orbs and throw it at him; conveniently, it can be used multiple times, as it returns to you on a chain of energy after you throw it.
* ''{{Painkiller}}'' has a demon morph SuperMode which is devastatingly effective against the game's demonic enemies.
* The original, 2-D platformer ''PrinceOfPersia'' forces the player to leap through a mirror at one point, creating a "shadow twin" who bedevils the player in later levels. When the hero finally confronts his twin, the player discovers that striking the twin damages the hero, and killing the twin results in the hero's death. The only way to defeat the twin is to [[spoiler: sheathe your sword and run into the twin, causing the hero's dark side to be re-absorbed.]]
* In ''Franchise/DotHack'' video games you can use Data Drain against the enemies. The same skill the 8 Phases use against people to put them into comas. In fact, Data Drain is the only way to defeat most of them.
* ''VideoGame/FinalFantasyTacticsAdvance'' is a good example of a game where you can [[TheComputerIsACheatingBastard cheat just as much as the computer...]] [[GameBreaker and possibly even more than that.]]
** In the story, Marche often gets attacked by various groups of people, including bounty hunters, that [[spoiler:his brother Doned]] tells about him when he goes out on missions. Marche, wanting to lure [[spoiler:Doned]] out to talk with him, takes an especially promising job. He's able to defeat his foes and [[spoiler:reconcile with his brother]].
* In ''[[VideoGame/PsiOpsTheMindgateConspiracy Psi-Ops: The Mindgate Conspiracy]]'' telekinesis is one of the best ways to deal damage to Edgar Barret, a much stronger telekinetic specialist (how much stronger? You can throw boxes, he can throw trains!).
* Reverse example. in ''DevilMayCry 3'', Dante goes the whole game with his broad sword and his brother Vergil with a [[KatanasAreJustBetter Katana]]. At the final level, Vergil gains a similar sword and starts fighting almost exactly like ''you'', going from a GlassCannon Ken to a full-fledged PerfectPlayAI.
** Badass as it was in the boss fight, the cutscenes make it evident that Dante was far superior with broadswords.
* In ''{{Okami}}'', the kitsune lord Ninetails has a Celestial Brush of its own on each of its tails. Trying to use your own Celestial Brush will make Ninetails bring up a Brush to match and disrupt your Technique, forcing you to finish the pattern as soon as possible before the enemy crosses it out.
** In the sequel ''{{Okamiden}}'', the final boss can strike out your Celestial Brush techniques until you manage to make the sun re-appear, at which point he will start attempting to use Brush techs of his own...which you can, of course, strike through and interrupt yourself.
* Subverted in ''{{Summoner}}'', when the WhiteMagicianGirl and TheLancer go two-on-two against the evil queen and dark prince. The queen is a powerful magician, but totally immune to magic, while the prince is a powerful swordsman, but totally immune to physical damage.
* Not about fighting, but in ''NeverwinterNights2: Mask of the Betrayer'' you can help a guy from DealWithTheDevil by beating the devil with its own contract.
* If you kill another player enough times in any class-based multiplayer (like ''VideoGame/TeamFortress2'') expect him to eventually switch to the same class in an attempt to balance the playing field.
* The final boss of ''VideoGame/WarioLand: Shake It!'', the Shake King uses the same techniques as Wario for the first stage of the battle, which includes charging and ground-pounding. Wario, who is smaller and faster can take advantage of certain things, like jumping on the Shake King while charging to disrupt him and run headfirst into a wall.
** There's also B Bunny, a rabbit type boss in ''Wario Land 2'' and 3 that has to be beaten at a variant of either basketball or football (soccer in the US), by using the boss as the ball. While the boss is trying to use Wario as the ball instead.
*** In case that was difficult to explain, see the end of [[http://www.youtube.com/watch?v=Mpp59VRwhZE&feature=related this]] video.
** Speaking of Wario, he'll try doing this to ''you'' when you fight him at the end of ''[[SuperMarioLand2SixGoldenCoins Super Mario Land 2]]''. He uses a carrot on himself to give him the same flying bunny-ears power that Mario could use in the game; beat him in that form, and he picks up a Fire Flower...
* In ''VideoGame/WorldOfWarcraft'', this is often reversed, with boss fights designed to use players' abilities against them. [[http://www.wowwiki.com/Herald_Volazj Herald Volazj]] in Anh'Kahet is one such boss, who splits the party and forces each player to fight clones of the others. A similar effect is used by Valkyr Heralds in Icecrown Citadel, who spawn copies of randomly chosen raid members that everyone must fight. Perhaps the most literal use of this, however, is in the Trial of the Crusader, whose third boss fight consists of a group of [=PvP=] opponents that behave as much like opposing players as it's possible for the game's AI to simulate. For example, crowd control abilities, normally useless on bosses, suddenly become mandatory.
* In ''Franchise/{{Pokemon}}'', several types are weak to themselves, and in some cases, that is the only thing that is super effective. As an example, Dragon-type Pokémon are weak to Ice- and Dragon-type attacks. However, later games in the series introduce two Water/Dragon-type Pokémon, Palkia and Kingdra. The Water type cancels out the Ice-type weakness, and the Dragon type cancels all of Water-type's weaknesses, meaning that the only easy way to take one of these down is to beat them at their own game with a Dragon-type attack. (This only applies up until [[VideoGame/PokemonXAndY Generation VI]], which introduced a new type strong against them.)
** The move Mirror Move allows the user to use the move just used by the opponent, and the move Transform literally allows Pokémon to beat the opponent at their own game, as the [[DittoFighter Transforming]] Pokémon gains access to the target's typing, stats, and moves. To a lesser extent, the move Role Play can change the user's ability to that of the target.
* Averted in ''PlanescapeTorment'': a mage duel with the final boss is impossible to win even if you cheat to get so high level the XP meter refuses to register more. Instead, you can defeat him by: beating him with something, having your buddies beat him, talking him into surrendering, talking him into suicide, nullifying him out of existance with sheer force of will, or even killing yourself.
* In ''VideoGame/SuperPaperMario'', one level has a Koopa Troopa running away from Mario, hitting a ? Block, and snagging a Mega Star to grow into a [[AttackOfThe50FootWhatever giant 8-bit version of itself]] and proceeds to try and crush Mario. This is more of a joke rather than a dangerous mook since running to the left snags you your own Mega Star, allowing you to thwart the Koopa with your own giant 8-bit self.
** Additionally, unlike Mario and friends, the Koopa can be stomped out of your way as always. You simply need to gain enough height to reach his head.
* Villainous version in ''VideoGame/LuigisMansion'': [[spoiler:The giant Bowser robot that King Boo uses has a vacuum-like weapon of its own that it can use to swallow Luigi and do a ''lot'' of damage.]]
* ''VideoGame/GrandTheftAutoSanAndreas'' has a scene where you can fight a Vietnamese gang boss sword vs sword (he tosses one to you to duel). Of course, if by then you've picked up a shotgun, you're still more than free to use it.
** ''SaintsRow 2'' has a similar scene where you fight a rival gang's (A yakuza style gang who fight with swords) enforcer and his men with samurai swords. Although you can't use any other weapon during this part of the game.
* The ''[[LegoAdaptationGame Lego Star Wars]]'' games have the player Force-pushing objects, thrown by the boss, back at the boss. Fighting Dooku even lets you do it with [[ShockAndAwe Force Lightning]] (but not in the PSP bonus level version or in ''Complete Saga'').
* Subverted in ''VideoGame/HypeTheTimeQuest'', the Final Boss, Barnak, has a "Smart Tornado" that follows the character. You can use this to your advantage by getting Barnak in between you and the tornado. It isn't very effective, though, and is absolutely not necessary, but fun.
* In ''RedSteel'' (the first), your character proceeds through each level with the usual assortment of FPS firearms. The BossBattle of each level, however, is inevitably a swordfight, requiring you to put away your guns and use your blade instead.
* ''SuperSmashBros Brawl'' has a boss named Duon that has a melee-attacking side and a projectile-throwing side. The blog notes that it's best to match him and fight close to it when the melee side is facing you, and keep your distance from the projectile-throwing side.
* Subverted in ''VideoGame/{{Doom}}'', as the rocket-firing Cyberdemon actually takes less than normal damage from the rocket launcher, making it rather ineffective[[note]]To be specific, the rocket deals damage from both the impact and the explosion itself. The Cyberdemon is immune to splash damage, which means it only takes damage from the impact itself.[[/note]].
* The Prowler from ''VideoGame/AssassinsCreedBrotherhood'', with his hooded robe and retractable switchblade, appears to be a Templar attempt to fight the Assassins with their own methods. In fact, the Multiplayer itself is this, being a training program used by the Templars in order to replicate Assassin techniques.
** This is solidified in ''VideoGame/AssassinsCreedRevelations'': One of the new enemy types is the Stalker, who can be dressed in white, appears out of friggin' nowhere and tries to shank you... just like you've been doing to countless Templars.
* In {{Pickory}}, [[UnexpectedGameplayChange one of the boss fights is actually a clone of [=KSpaceDuel=]]]. You get a ship which is identical to the boss in every way.
* A literal example: a team of ''LeagueOfLegends'' developers was beaten at ''League of Legends'' by a team of ''HeroesOfNewerth'' developers, their [[DuelingGames chief competitors]] in the market, which is doubly ironic because ''[=HoN=]'' is considered by many to have a higher skill cap, which ''[=LoL=]'' fans often vehemently deny.
* [[VideoGame/GodOfWar Kratos]] pulls this on [[spoiler: Hades. The God of the Underworld tries to steal his soul. Kratos takes his soul-stealing weapons, then uses them on Hades.]]
* Don Flaminco in ''PunchOut'' uses this against you. For most opponents, you have to block or dodge their attacks and then counterattack. Don does the same trick against you, refusing to land a blow on you unless you strike first so he can counter. Of course, you can counter his counterattack.
* In ''{{Evolva}}'', you're forced to do this, as you must mutate to get the defeated enemies' attacks and use them against the enemies, if you don't want to complete the game only with your fists. It's still not recommended to use an attack against the enemy that gave you the attack in the first place.
* In ''[[VideoGame/TheElderScrollsVSkyrim Skyrim]]'', dragons have the natural ablity to use "[[WordsCanBreakMyBones shouts]]". When humanity learned how to use shouts (which the dragonborn can do as easily as a dragon) from [[spoiler: [[DefectorFromDecadence the dragon Paarthurnax]]]] they developed [[spoiler: a shout called "dragonrend", which was basically made of the draconic words for "mortal", "finite" and "temporary". As they were basically a race of TimeAbyss near-gods, the mere concept of relative time (particularly something ending) screwed with them so much [[WeaksauceWeakness it could be weaponised]] against them]].
* In ''VideoGame/SonicColors'', the FinalBoss uses Wisp powers against Sonic, who had been using them up to this point, complete with even having the same announcer. However, once it takes enough damage, it will begin to [[MyRulesAreNotYourRules combine and use two Wisp powers at once]].
* In the final battle of ''KirbysReturnToDreamLand'', [[spoiler:Magolor's second form and Soul form imitates the various [[LimitBreak Super Abilities]] used by Kirby as attacks after he TurnsRed.]]
* Vitally important in both the {{X-Com}} series and UFOAfterblank series. Humanity only stands a chance against the alien invaders by stealing and reverse-engineering all of their technology as quickly as possible, as well as capturing the aliens themselves, dead or alive, for dissection or interrogation respectively.
** X-COM ''loves'' this. Aliens with psionic powers are the bane of your squaddies... Until you get a psionics lab and train your gifted soldiers to use their powers back. Nothing better than watching a fully levelled psionic trooper take on an Ethereal in a mind war and ''win''. In the new Creator/{{Firaxis}} game, there's also achievements for killing a [[TheBrute Muton Berserker]] with an [[TheBigGuy MEC Trooper's]] PowerFist, or defeating an [[TheQuisling EXALT]] sniper with [[SniperDuel one of your own]].
* In many competitive and online games where MirrorMatch is possible, sometimes a player is able to defeat his opponent by simply being the same character and using their abilities against their opponent in a more skilled fashion. Similarly, sometimes certain set ups, abilities, or the like can be countered by simply using the same thing against that player.
* ''VideoGame/SuperMario3DLand'' has the final boss invoke the trope against the players. [[spoiler: Bowser uses a Super Bell to gain the same scratching and wall climbing abilities like the players can. Bowser then uses Double Cherries to create up to 4 clones of himself with all of them attacking the players at the same time.]]
[[/folder]]

[[folder:Web Original]]
* In [[http://www.youtube.com/watch?v=t9-faa56l-s this]] followup to ''WebVideo/TheHorriblySlowMurdererWithTheExtremelyInefficientWeapon'', Jack attempts this against the Ginosaji. [[spoiler: It backfires completely.]]
[[/folder]]

[[folder:Western Animation]]
* Inverted in ''WesternAnimation/SamuraiJack'', after Aku grows tired of sending wave after wave of bounty hunters against Jack, wondering aloud "Is there any fighting style that can defeat his!?" He decides to solve the issue by creating an EvilTwin of Jack [[EnemyWithout from his hatred and anger]]. True enough, Jack could not defeat it in combat; instead, [[SheatheYourSword he defeated the clone by meditating and reaching inner peace]].
** Played straight when Jack becomes a ninja to fight a ninja.
* Also inverted in an episode of ''WesternAnimation/TeenTitans'', where the demon Trigon forces Cyborg, Beast Boy, and Starfire to fight the evil side of themselves--a black-and-white, evil copy of each Titan. After a long while of trying (and failing miserably) to beat themselves, they figure out that the copies can be defeated by each Titan taking down a copy other than their own.
** Same thing happened, though on smaller scale, on ''JusticeLeagueUnlimited'', along with a BreakingSpeech. Superman was having problems taking down his evil clone, prompting Wonder Woman to fly in and suggesting to switch dance partners. Green Lantern and Hawkgirl end up doing the same thing. We see The Flash and Batman easily beating their own doubles, however, the Flash with a particularly effective ShutUpHannibal, and Batman by virtue of the fact that he didn't give his double a chance to start messing with his head.
** This also happens in one of the early Archie SonicTheHedgehog comics, wherein the main cast has an all-out brawl with their MirrorUniverse {{Evil Twin}}s. The heroes start out fighting their own counterparts and neither side can gain an advantage, but after they switch partners the goodies handily tromp the baddies.
** Ditto for the ''WesternAnimation/{{Gargoyles}}'' episode, "The Reckoning", when the Manhattan clan fight the clones that Thailog made of them.
** Also don in an issue of Spider-Ham complete with lampshade hanging, Mooster Fantastic consult the hero's manual and find the proper tactic for dealing with evil counterparts, switching opponents!
* ''WesternAnimation/ChipNDaleRescueRangers'' uses this in most episodes with Professor Nimnul as the villain. Most times that the Rescue Rangers go up against Nimnul, they end up turning his own inventions against him.
* In [[ComicBook/{{Asterix}} The Twelve Tasks of Asterix]] they face a trial that the magic potion has no effect on... Bureaucracy! However, Asterix is smart enough to play the system against itself, causing enough chaos for the head of the place to just hand him the item to make him go away.
* WesternAnimation/SouthPark: Cartman beats an older student at his own psychological game.
* WesternAnimation/AvatarTheLastAirbender: Said word for word by Long Feng, but denied by Azula.
-->'''Long Feng:''' You've beaten me at my own [[TheChessmaster game]].\\
'''Azula:''' [[MagnificentBastard Don't flatter yourself]]. [[XanatosSpeedChess You were never even a player]].
* Utilized by both sides in ''TheDreamstone'' in which the villains constantly try to steal the heroes' MacGuffin to spread nightmares. The two roles are reversed whenever [[EvilCounterpart the Nightmare Stone]] is discovered by the villains, leading the heroes to try to steal it from them. While the Urpneys do get to dish a little payback fending them off as they were before, [[TheGoodGuysAlwaysWin for obvious reasons]] the heroes usually handily succeed at the same task the villains failed throughout the series within the course of one episode.
* Played with ''WesternAnimation/TheSimpsons'' episode "Bart Carny". The Simpsons let a father and son who worked at a CrappyCarnival Homer got closed, which included such things as an impossible ring-toss, stay at their home. The father and son ended up locking the Simpsons out of their house when they were away. Homer bet the house on being able to throw a hula-hoop around their chimney and the carny agreed. [[spoiler:When Homer seemed about to throw the thing, the family run back into the house and lock the door. So they ''really'' beat them at their own game: cheating.]]
[[/folder]]

[[folder: Real Life]]
* BoardGame/{{Chess}} Grandmaster Jan Timman is known for using his opponents' favorite opening lines against them. Sometimes this backfires, but often it works and he wins, partially due to the psychological difficulties of essentially "playing against yourself".

[[/folder]]

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