History Main / MirrorBoss

* The final boss in the NES version of ''DoubleDragon'' is none other than the player's twin brother, who has the same skills as the main character, but with greater vitality. In the original arcade, the twin brother was originally the Player 2 character, who still fought Player 1 at the end of the game.

** Sonic fights Knuckles and Gamma in adventure.

* All bosses exept Perfect Chaos in MArioAndSonicAtTheOlympicwinterGames.

** Knuckles in Sonic (3) and Knuckles if you play as Sonic and/or Tails, though he's ridiculously easy to beat but Hidden Palace Zone is a breather level anyway. He is pretty much the same knuckles you can play as, only with some HP instead of rings, a punch attack and the ability to block by ducking. He even takes collision damage, though trying to walk into him will just get you punched. But you can stand infront of him and get Tails to walk into him from behind if playing as Sonic and Tails. Tails takes damage too, but he's invincible (in 2P mode). If Knuckles drops from a glide on your head, only he'll take collision damage.

* In the ''{{Metroid}}'' franchise, you face off against evil Samus duplicates several times. THREE battles against Dark Samus in ''MetroidPrime 2: Echoes''. You fight Gandrayda in ''MetroidPrime 3: Corruption'', who frequently takes Samus's form int he battle, not to mention Dark Samus as the penultimate boss, never mind that Dark Samus and AU 313 BOTH deploy Samus clones as decoys. And in Metroid Fusion, you spend much of the game hiding from, fleeing from, and ultimately battling the SA-X.

* One mission in ''{{Naruto}} Shippuden: Clash of Ninja Revolution 3'''s story mode has Guy fighting himself. The CPU-controlled character copies the exact same moves you do. However, it's chakra gauge fills up slightly slower than yours. So not only can you pull off your own special sooner than the computer, but you can even have the computer waste its own.

** [[spoiler:Kariya and Uzuk]] are a better example. The pair has a light puck, are a pair (sharing the games two screen combat), and attack with a few common Psychs.

** Also subverted near the end of ''Baldur's Gate II'', where a random encounter has initially friendly NPCs turning into doubles of your party and attacking if you say the wrong thing - but gives them none of your party's powers, instead making them into a moderately challenging fight at best.

** Terra's final boss in Birth By Sleep exclusively uses Terra's own darkness moves against him, with the only exception being Shoot Locks (where he has his own variation of them since Terra's requires direct player input during the attack). He can also do other things only the player characters up to that point could such as heal himself (and even even gives a smug chuckle when doing so) dash and block and counterattack.

* ''KingdomHearts358DaysOver2'' has [[spoiler:Xion]], who not only fights a lot like Sora from the first game, but also has several of his special attacks, including Sonic Blade, Ragnarok, and Ars Arcanum. [[spoiler:Which makes sense, considering what [[strike:she]] it [[OppositeSexClone is.]]]] Not to mention that in its Final Form, it will use dual-wielding Roxas's [[LimitBreak Final Limit]] on you.

* Azel from ''GodHand'', who possesses the other God Hand and uses the same attacks and [[LimitBreak Roulette moves]] that Gene does.

* In {{Ys}}: The Oath in Felghana, a game full of battles with monsters, Chester is the only other [[TheCorruption complete]] human and the only non-{{Mook}} swordsman you will fight... and [[ThatOneBoss he knows what he's doing.]]

* In the ''{{Metroid}}'' franchise, you face off against evil Samus duplicates several times. THREE battles against Dark Samus in ''MetroidPrime 2: Echoes''. You fight Gandrayda in ''MetroidPrime 3: Corruption'', who frequently takes Samus's form int he battle, not to mention Dark Samus as the penultimate boss, never mind that Dark Samus and AU 313 BOTH deploy Samus clones as decoys. And in Metroid Fusion, you spend much of the game hiding, fleeing from, and ultimately battling the SA-X.

** There is also one quest where you fight against your inner turmoil which is a basically a clone of yourself, though the character only uses melee attacks despite the fact you may be a magic user character, and lacks any of your abilities and strength making it a easy fight.