%% Image selected per Image Pickin' thread: http://tvtropes.org/pmwiki/posts.php?discussion=1377107756039005700
%% Please do not change or remove without starting a new thread.
[[quoteright:332:[[VideoGame/SuperSmashBros http://static.tvtropes.org/pmwiki/pub/images/kirby_fireball_ssbb_5357.jpg]]]]

->''"Now ''I've'' got your power!"''
-->-- '''VideoGame/MegaMan''', [[WesternAnimation/MegaMan Ruby-Spears animated series]] (1995)

Ordinarily, learning a new technique requires an instructor and long days of practice. However, some characters have the power to learn techniques just by watching the instructor perform the technique a few times. Given the setting, this can even apply to [[StockSuperPowers super powers]], [[FunctionalMagic magic spells]], SupernaturalMartialArts, etc.

In the name of balance, such powers often have one or more limitations:
* They can only match the person if they remain nearby.
* [[DiscardAndDraw They can only hold one power at a time; gaining a new power rewrites the old.]]
* They [[HowDoIShotWeb don't know how to use the powers]] [[UnskilledButStrong as effectively as the original user]].
* It has a [[HourOfPower set time duration.]]
* The user also gains the target's [[WeaksauceWeakness weaknesses]] and [[KryptoniteFactor vulnerabilities]].
* The process includes a mental link, which may cause [[AMindIsATerribleThingToRead disorientation]], [[SoulFragment personality shifts]], or even {{loss of identity}}.

If no limitations exist and the character does not have a personality flaw to compensate, then this will likely degenerate into a StoryBreakerPower. This doesn't apply to team members with this power, who presumably have practiced using their teammates' abilities, making such a character the ultimate team player.

This ability isn't always as good as it sounds. Some may have [[HowDoIShootWeb trouble learning to control powers unfamiliar to them]], which means the new powers can be more of a hindrance than a help until they get the hang of things. Absorbing an opponent's powers may also backfire if they absorb the opponent's ''weaknesses'' as well, which the opponent can then exploit to win. TrickingTheShapeshifter may come into play.

Compare AllYourPowersCombined, AdaptiveAbility, and TheAssimilator.

!!Super Trope to:
* AwesomenessByAnalysis: Seeing the ability performed can grant the steps needed to initiate the power or moveset.
* CannibalismSuperpower: The character copies powers by ''eating'' the enemy.
* DittoFighter: A fighting game character that copies the opponent's moveset ([[ShapeShifting among other things]]).
* PowersAsPrograms: Magic and powers can be 'installed' into one person or another and used like a program.
* PowerParasite: The copied ability is actually stolen from the original user rather than duplicated.
* VictorGainsLosersPowers: The character gains the opponent's powers after defeating them.



[[folder:Anime & Manga]]
* While on a NotADate, Maki in ''Manga/{{Airmaster}}'' gets the idea for a new attack move simply from watching a samurai movie. She later uses it without any practice, even though the samurai is using a ''sword'' and Maki is strictly legs and punches.
* ''Anime/AngelicLayer'' prodigy Suzuhara Misaki is able to pick up her opponents' moves on the layer after seeing them only a few times, and she picks up moves performed by real people as well.
* In ''Manga/BakiTheGrappler'' the protagonist's AxCrazy BloodKnight father encourages him to steal and copy his opponent's moves and techniques in part because "It ''really'' pisses them off".
* Kazuo Kiriyama in ''Manga/BattleRoyale''. He can mimic the skilled martial artist Sugimura after seeing him use the moves in combat a couple of times. Even when Sugimura gains the ability to [[spoiler: use ki attacks]], Kiriyama quickly copies this as well.
* ''Manga/{{Bleach}}'': This is how Urahara trained Ichigo. Knowing he didn't have time to actually learn to fight, [[TrainingFromHell he just pummeled him until he learned]] the moves that were being used against him.
* Clare from ''Manga/{{Claymore}}'' is fairly adept at this, typically copying her allies rather than enemies. Roxanne of Love and Hate did it as well, but in a much more sinister way.
* ''Manga/DragonBall'':
** The Kamehameha is a powerful energy attack that took decades for Master Roshi to create and perfect. Goku saw Roshi perform the attack once and was immediately able to do a smaller version. After a few more times, Goku completely master it and able to create a Kamehameha equal to his master. And this isn't the last time. He learns the After Image, Solar Flare, and the Hasshu-ken (Eight-Arm Technique) from seeing them once or twice. In fact, all of Goku's techniques are copied from his friends and masters except for his Instant Transmission, which he learns off-screen on another planet. He even improves upon the technique he copies and comes up with variations once he learns them.
** Tenshinhan uses the Kamehameha against Master Roshi at the 23rd Martial Arts Tournament after seeing Yamcha use it against him, stating explicitly that he can learns an attack after seeing it once. Although we only see him copy the Kamehameha and the After Image.
** One of the most notable and {{FridgeLogic}}-y examples of an ability learned this way is ''flight.'' Tenshinhan and Chaotzu first display it as a limited ability to hover a few feet off the ground. Goku replicates it without really trying, and pretty soon everybody is flying across continents at supersonic speeds as though it were as natural as walking. For some reason, only Videl and Goten seem to need formal training in order to learn how.
** Everyone can copy Krillin's Kienzan / Destructo Disc, apparently. And as an extra "kick in the stones" to Krillin, some of those people can use it to greater success.
** Vegeta copies the protagonists' ability to sense ki and suppress his own power level to avoid detection by scouters, despite this not even being something that can even be "observed" at all. Just learning that it's ''possible'' was enough for Vegeta to figure out how to do it himself in a matter of days at most, giving him a key advantage against Freeza's minions. Justified with the sense, since he might have felt others' ki all along without recognizing it, and once he knew it could be done he started paying more attention to his senses.
** Cell has this ability as his schtick, being able to copy anything once he absorbs them. Thanks to his trait of assimilating DNA as well, he gains everyone's secondary powers as well, including Namekian super regeneration, Saiyan's intense resilience, and Freeza's ability to survive without an atmosphere.
** Buu, much like Cell, can copy the techniques of the people he absorbs. He also learned moves like the Kamehameha and Instant Movement from seeing them once.
* One of the definitive powers of Ifurita, the "Demon God" android from ''Anime/ElHazardTheMagnificentWorld,'' who can copy and improve on any attack used against her. (That she's pretty much [[NighInvulnerability indestructible]] just helps her pick up things.)
* In ''Manga/FistOfTheNorthStar'', The Hokuto Shinken technique Suieishin allows Kenshiro to learn an opponent's techniques just from fighting or observing them. Two notable examples is during Kenshiro's fight with Shew by using Nanto Seiken techniques and when Kenshiro confronts Raoh in his rush to find the Last General of Nanto, where he uses Toki's stance and one of Rei's techniques. Rihaku (and in the anime, Raoh) see the spirits of the fighters that Kenshiro has fought and learned from.
** More explicitly evoked by a blinded Kenshiro in the anime when several of Raoh's biker troops tried to stop him from reaching the General: the troops deliberately revved their engines in hopes that it would drown out the sound of their attack, thus Kenshiro drew upon his experience with Shew to defeat them.
* ''Anime/GaReiZero'': Kagura and Yomi fight a spirit which mirrors their moves exactly. Its effective enough to put Yomi out of action temporarily and give Kagura her first major injury.
* In ''Manga/AliceAcademy'', Mikan and [[spoiler:her mother]] Yuka [[InTheBlood both]] have the ability to turn other peoples abilities into gems and then absorb said gems into their body, gaining those powers.
* In ''Manga/{{Guyver}}'', the zoanoid Aptom has a particularly terrifying version of this power. At first he could only poorly mimic other forms: admittedly he could do this after only ''looking'' at them, but his imitations were far inferior to the originals. Once he's reworked by one of the series' [[BigBad Big Bads]], he gains the ability to ''perfectly'' replicate ''any'' form just by getting a sample of their DNA. Except he gathers samples by melding genetic matter with his own body, and he can do this while the target is still alive. This becomes Aptom's favored method of killing, and it is lethal to amazing degrees: at one point he has contact with another character for roughly 3 seconds before being turned into shreds of skin, then atomized. In that time, his DNA-merging trick had already [[BodyHorror seeped into the other character enough]] to let Aptom take over with all his abilities intact, ''plus'' those of the character. Oh, and if he wants he can just let the DNA replicating system seep into someone and overwrite them without absorbing their body, meaning he can replicate himself without limit so long as there are bodies around to infect. He can even do this to ''[[CameBackWrong corpses]]''.
* In ''Manga/HunterXHunter'' the leader of the Phantom Troupe can steal the Nen abilities of others by learning about them, asking questions, and knowing its name. The original user of that ability can then no longer use that ability again.
** Ging is shown to be able to imitate other people's punching-based abilities after getting hit by them. Naturally, the drawbacks are that he has to take damage and that it's limited strictly to punches. In addition, people tend to only show their abilities as a last resort or to finish a battle quickly, so he rarely gets to copy in the first place. That being said, Ging refers to it only as a "talent" and not a power.
* ''Manga/InuYasha'':
** BigBad Naraku, is able to consume other demons to steal their body parts and abilities.
** Inuyasha's {{BFS}} is able to absorb new special abilities from some of the enemies he uses it to slay.
** One of the two minions of the BigBad in the [[Anime/InuYashaTheMovieAffectionsTouchingAcrossTime first movie]] has this ability, which she uses to copy [[TooDumbToLive Miroku's Wind Tunnel]]. Apparently she thought it was simply a powerful attack and not a ''bona fide'' lethal curse that Miroku takes advantage of. She is defeated when she opens it wider to strengthen it and the [[SuperPowerMeltdown predictable happens]].
* Nanami from ''LightNovel/{{Katanagatari}}'' can learn any technique she sees once, and master it if she's seen it twice. This isn't limited to martial arts techniques, either - things she's been able to copy include body-remodification, super-strength, and ''necromancy''.
* In ''Manga/{{Kinnikuman}}'' Stecasse King, a giant cassette player, inserts tapes from the Choujin Encyclopedia into his chest, gaining the abilities of whichever wrestler the tape covers. This proves his downfall when he tries to copy Kinnikuman -- the tape he has is outdated, from back in the days when the big guy was a cowardly wimp.
* Kise of ''Manga/KurokoNoBasuke'' has the ability to copy any basketball technique he's seen and make it his own.
** Actually, it's more like he uses Main/Awesomeness by Analysis to analyse moves and use them himself.
* In ''Anime/MagicalGirlLyricalNanohaAs'', the final challenge -- the manifested form of the Book of Darkness -- not only has her own suite of nasty-sounding attacks, she's also got the ability to copy and enhance the attacks of anyone whose magic has been used to fuel her. Which, unfortunately, includes both Nanoha and Fate. [[MassOhCrap Cue our heroes bravely running like hell]] to escape the blast-range of Nanoha's trademark [[WaveMotionGun Starlight Breaker]]. Hayate also makes use of this same power shortly thereafter to become an InstantExpert in magical combat.
* ''Manga/MahouSenseiNegima''
** Ku:Nel Sanders has a Pactio card [[spoiler:that allows him to become anyone he's met for a few minutes, complete with all their abilities. However, he can't maintain someone stronger than him for more than that]].
** Prior to the tournament finals, [[spoiler:Negi receives a pactio artifact from Princess Theodora]] that allows him to [[spoiler:use all the artifacts of his ministra]]. However, for political reasons[[note]]Or if you prefer a Doylist approach, power balance issues[[/note]] [[spoiler:the contract is canceled after the fight]].
** [[CrazyAwesome Jack Rakan]] demonstrates this ability too. He can use high-level Shinmeiryuu techniques from simply having seen Eishun perform them.
* The protagonist of ''Manga/MedakaBox'' initially comes off as AlwaysSomeoneBetter, but it becomes apparent that every time she does lose to someone at something, she starts mimicking and equaling them. Post-GenreShift, this turns out to be an actual superpower.
** The downside of this comes up a few times in the manga. For example, she can't turn the power off, so when the heroes deal with an opponent whose power is incredible killing intent, Medaka's brother keeps her from fighting since she would copy his power, perfect it, and end up becoming an unstoppable killing machine. It's also shown to be useless when it comes to artistic pursuits because while Medaka can copy technique, there's absolutely no passion or soul behind it -- she can play the guitar incredibly well, but it utterly fails to inspire any emotion in its listeners and is really no different from a computer programmed to make music.
* ''Manga/MegaManMegamix'': Not as prominent as other versions, but Mega Man DOES copy powers here.
* In ''Manga/{{Naruto}}'', Kakashi Hatake and the Uchiha clan have an explicit ability to copy other ninjas' moves with their Sharingan. Kakashi is known to screw with his opponents' minds by subtly hypnotizing them into using techniques he already knows, making it look like he can copy their techniques before they even finish using them. The only limitation is that they have to be physically capable of using the moves they copy, meaning they can't copy moves based on bloodline traits or [[EldritchAbomination Tailed Beast]] abilities, but most anything else is fair game.
** Downplayed in that throughout the series so far Sasuke has only used the ability to imperfectly copy one Rock Lee's moves, Kakashi has only used moves that he copied from anonymous fighters before the series began and no other Uchiha has been seen copying moves at all. That said the Sharingan is a near StoryBreakerPower for other reasons down the line.
* In ''Manga/{{NEEDLESS}}'', the protagonist and BigBad, through the Zero Fragment, can memorize the series' huge amount of skills just by seeing it used or [[MundaneMadeAwesome headbutting]] them. The villain's variant is pretty much the ultimate last word in Power Copying: he not only copies, he makes ''the copy stronger than the original''.
* In ''Manga/OnePiece'', Luffy is able to replicate [=CP9's=] [[FlashStep Soru]] technique after [[AwesomenessByAnalysis watching]] the technique a couple of times and adapting his RubberMan powers to allow his body to perform the task. Much later Sanji successfully discovers how to perform their [[DoubleJump Moon Walk]].
** Blackbeard was revealed as being able to do this when he [[spoiler:took the power of the Tremor-Tremor Fruit from the recently deceased Whitebeard]]. How he does it is unknown so far. He has a Devil Fruit power that allows him to absorb things, but the dialogue implies that it may have something to do with having a unique body structure. This became a more literal example of Mega Manning later on, as it was revealed that he can [[spoiler:take the Devil Fruit powers of anyone that he's killed, though whether he is taking them for himself or giving them to his crew is unknown]].
* Several characters from ''Manga/ThePrinceOfTennis'' have an ability referred to as State of Self-Actualisation (Muga no Kyouchi), which allows them to subconsciously replicate any techniques ever witnessed. Some other characters, while not possessing Muga, can also duplicate their opponents' moves, giving them a mental edge.
* {{Wa|lkingTheEarth}}ndering [[ActionGirl Warrior]] [[MeaningfulName Reina]] enters the ''Anime/QueensBlade'' competition after dueling (and losing to) several of the other Queen's Blade competitors and incorporating their moves into her repertoire, taking her from rank amateur to world champion, and later defeats her friends and allies in the competition by taking on their ''goals'' and making them her own. As a ''finishing move''.
* Ranma of ''Manga/RanmaOneHalf'' can learn new martial arts techniques simply by watching others train at them, or even by having the techniques used against him.
* In ''Manga/RozenMaiden'' when one doll defeats another, they not only gain the defeated doll's Rosa Mystica, but can also use their powers.
* ''Manga/RurouniKenshin'':
** While it didn't exactly happen overnight, KidSamurai Yahiko nonetheless managed to duplicate one of Kenshin's signature techniques solely from observation -- which is still fairly impressive, since Kenshin apparently went through several years of TrainingFromHell to master his Hiten Mitsurugi style.
** Subverted big time at the end of the manga. [[TheQuietOne Aoshi]] fights a member of a QuirkyMinibossSquad who specializes in copying the sword techniques of his enemies and gets a psychotic joy out of killing opponents with their own techniques. It appears to be working and the guy seems to have the edge on Aoshi until Aoshi suddenly kicks him right in the face and informs him that as a martial arts master, using swords is only a part of his repertoire. (And the copycat can't copy Aoshi's kenpo skills). The angry copycat then tries to go through with killing Aoshi with his techniques, but Aoshi correctly anticipates the moves the copycat will use, comments on how dumb it is trying to kill him with moves that he knows inside and out, and then promptly breaks the copycat's swords and beats the crap out of him.
* In ''Manga/SaintSeiyaTheLostCanvas'', Leo Regulus can fully understand how a technique works, copy it and execute it ''better than the original user'' just by seeing it.
* In the manga chapters of ''Manga/{{Saki}}'' set after the Prefecture finals, [[spoiler:Yumeno Maho, [[ThoseTwoGuys one of the two]] {{kohai}} from Nodoka's previous school (she's the one with the ribbon)]], is revealed to have the power to copy any mahjong player, but she can only do it once per round per day each. She demonstrates this by using the styles of all the Kiyosumi players, culminating with her out-[[FinishingMove Rinshan Kaihoing]] Saki herself.
* Claude in ''StarOcean EX'' has this ability, though notably absent in the games.
* ''Anime/TigerAndBunny'' [[spoiler: Kaede]] can imitate the power of the last NEXT she touched, a very ''very'' important plot twist.
* Takeshi Yoshida, from the baseball manga ''Manga/{{Touch}}'' is able to imitate a pitcher's style perfectly just by watching them. He develops an impressive repertoire [[spoiler:but is undone in the end by a lack of endurance]].
* According to Decepticon rumor, Thrust of ''Anime/TransformersArmada'' can copy his opponent's fighting style just by watching him. He's never actually done this in canon, but since everyone's fighting styles seem to be either "run at enemy and grab his fists forcefully", "swing sword like baseball bat" or "shoot from a distance", he doesn't seem to have a reason to.
* ''Manga/YuYuHakusho'':
** In the movie, ''Bonds of Fire'', Kuwabara encounters a demon who can mimic any technique his opponent uses. After being matched move-for-move, Kuwabara tricks his enemy into copying a move that throws every single bit of spiritual energy at the target. The demon swiftly realizes he's just doomed himself, as while he can copy energy attacks, he can't copy his opponent's ''physical'' strength... and Kuwabara is far stronger than he is. Cue asskicking.
** Gourmet, an enemy from the third season, had a CannibalismSuperpower. This unfortunately proved to be his downfall when he ate the Elder Toguro, who regenerated and took over Gourmet's body from within in the most horrible way possible.
** Another example is Rando: he was a demon that could perform and even improve upon special abilities after seeing them used. Prior to his battle with Yusuke, he had already acquired up to 99 of them. However, he does not have complete mastery of his stolen techniques and doesn't understand their weaknesses. He gets done in because he didn't know that his chant technique can backfire if his victim can't hear him.
* Tachimukai from ''VideoGame/InazumaEleven'' is able to copy Endou's Hisatsu Techniques just by watching him, on TV!
* Hana from ''Manga/{{Gate 7}}'' is described as "''Not''" and therefore "Everything is taken in" meaning that zhe can adopt opponents' techniques as offense or defense as zhe likes. [[spoiler: This serves to differentiate hir as much as associate hir to Chikahito who is "Not" as well]]
* Several enemies in the first ''Franchise/SailorMoon'' anime had this ability, including the Gemini Warriors (copying Sailor Mars and Mercury), Techniclon (copying Sailor Jupiter), and Malachite (copying Sailor Jupiter, Venus, and Mars).
* In ''Manga/ArataKangatari'', a Shou is allowed to use the powers of the Hayagami of other Shou who have submitted to them.
* From ''Manga/DeadmanWonderland'', there's Mockingbird: true to his codename, he can mimic the Branch of Sin of any Deadman whose blood he tastes, [[spoiler: except for Ganta's special nuke shot]].
* In ''{{Franchise/Anpanman}}'', there's the Donburiman Trio. Because their heads are rice bowls (with the donburi contents acting as their power source), they can be refilled with different ingredients when their original ones are drained, which can change their personalities and powers, though they only last for one episode. Some examples include Tendonman being filled with tempura soba (giving him the samurai abilities that Katsuobushiman has), Katsudonman being filled with natto (giving him Nattoman's never-give-up attitude and agility), and Kamameshidon having tuna sashimi in his head (giving him Tekkanomaki-chan's ninja-like skills).
* Being a deconstruction of the FightingSeries PlayedForLaughs, ''Manga/MutekiKanbanMusume'' parodies this trope. Because Kankuro is the resident IdiotHero he uses InsaneTrollLogic to guess a way to defeat Miki by imitating a local train:
--> It's similar to animal styled martial arts, They imagine themselves as the animals they're imitating, nya. In other words: ''The train is pulling into station four, please step behind the yellow line… KATAN KATAN, KATAN KATAN. Yes, this is the result of my special training. My goal is… a train!''
** Later, Miki will do the same, only she would imitate a ''bullet train''.
* This is the [[spoiler:ability of Yamada]] in ''Manga/YamadaKunAndTheSevenWitches''. As with all other magic in the manga, the powers are copied by kissing.
* In ''LightNovel/ACertainMagicalIndex'', Rensa can use the powers of the Level 5 espers and any esper within a 200 meter radius, but one at a time. She cannot copy a power that she cannot understand, like Gunha Sogiita's. It is pointed out that she can't use a power as well as the original because esper powers require vast computational skills. She adds that if an esper dies, she can't copy their power anymore. [[spoiler: When she tries to copy Touma's [[AntiMagic Imagine Breaker]], her arm blows up.]]
* ''Anime/DigimonFrontier'' has Mercurymon's digivolved form, Sakkakumon, who can learn the attacks of other and shoot said attacks out of its [[EyesDoNotBelongThere many eyes]]. He can't adapt to combined attacks, though.
** ''Anime/DigimonTamers'' had any [[{{Mon}} Digimon]] that died exploding into shards of data that their opponent could absorb to grow stronger, essentially giving all of them CannibalismSuperpower, though the main characters usually made a point of NOT absorbing defeated foes. Of course this ended up being used to copy [[TheyKilledKennyAgain Leomon's]] [[ShapingYourAttacks Fist Of the Beast King]].
*** And that's separate from the more common use in the series, which involves copying the powers not from other living (or dead) digimon, but from cards depicting the ones from the game based on the first TV series (which is a ShowWithinAShow that is referenced but not actually shown)
* This is the power of the assassin Fukuro in ''Manga/FairyTail'', who ''eats his opponent whole'' and "digests" their powers. He swallows Natsu and uses his Dragon Slayer techniques, but Gray comments that they don't really compare to the real thing.
* First time titular character from ''Manga/{{Toriko}}'' fought with red nitro, he used his signature move on him. After getting back up, creature proceed to use this attack, [[AwesomeByAnalysis after only seeing it once]].
** Midora can copy any ability, that he observed long enough, regardless of what it is, making him one of the most overpowered characters in the manga.

[[folder:Comic Books]]
* ComicBook/{{Rogue}} from ''ComicBook/XMen'' is possibly the best-known example in the world of comics. However, her power works on bare skin contact and works [[BlessedWithSuck whether she wants it to or not]] and, in most cases, puts the "donor" into a coma that lasts as long as the powers are transferred to Rogue. In the Ultimate and movieverse version she even [[{{Pun}} sucks]] the life out of the victim. This has been a constant source of angst, but since then she has gained better control so that touching people isn't always a near death sentence. There have been other X-Men examples over the years:
** Synch from ''ComicBook/GenerationX'', though he possibly had the second-lamest power out of the group. As he couldn't keep any borrowed powers once their owner left his radius, there wasn't much he could do by himself and couldn't even fend off a pair of human bullies.
*** Several characters said he had the potential to be extremely powerful, more than once he was shown using borrowed powers better than their original owners, and he could use his power for lots of secondary effects like identifying and tracking other mutants. It's just that none of that helps him when faced with an entirely mundane threat like a bomb.
** Gen-X's archenemy Emplate could this too, by feeding on a mutant's marrow via the mouths in his hands. Unlike most others, however, he must do this to survive. Basically, he's a mutant vampire. His victims gain the same mouths on their hands he has, and the same compulsion to feed, also similar to [[OurVampiresAreDifferent certain vampire stories]].
** Mimic, on the other hand, need only be in the proximity of another superhuman. He gets a bonus, too: The main Marvel Universe Mimic has permanently taken on the powers of the original five X-Men in addition to this, and his ParallelUniverse double, the Exiles version, can hold any five powers at a time (though at half the original power level each).
** Pandemic injected himself with a virus that would copy mutant powers. He is defeated when Sabretooth has him gain his HealingFactor.
** ComicBook/HopeSummers, mutant messiah, has this power along with the ability to influence the mutants around her.
* ComicBook/{{Taskmaster}}, of Creator/MarvelComics, possesses photographic reflexes. He can do anything after seeing it performed once, with exactly as much skill as the person he watched had in the task. Up to and including [[http://photos1.blogger.com/blogger/3841/751/1600/AgentX05-Taskmaster.jpg Chow Yun-Fat]]. However, he gains the ability to use it, not their powers. Meaning he can do the same flips as Spider-man, but he'll never be able to leap off a sheer wall. However, he can watch a scene in fast-forward and perform it at double-speed for a (very) limited time. Even more so, he uses his ability of reflecting an enemy's moves to predict what they would do next. Which got him absolutely nothing when SelfDemonstrating/{{Deadpool}} kicked his ass with [[ConfusionFu the power of dance and randomness.]]
** [[HandicappedBadass Echo]], also of Marvel, has the same ability.
** Finesse of ''ComicBook/AvengersAcademy'' has similar power. Seeing how her parents were criminals once trained by Taskmaster, she actually suspects he might be her real father. Of course with his amnesia he has no idea. Just in case through he wanted to copy some of her moves, so he wouldn't forget her, but because all her arsenal is itself composed of copies he already knows [[TearJerker he couldn't]].
** [[ComicBook/{{Batgirl 2000}} Cassandra Cain]] from DC Comics does as well as an extension of her ability to read body language. It's not so much a superpower as she's just so good at reading enemies and martial arts in general that one look is all it takes, and she can learn entire styles perfectly in minutes.
** As does Ryan Tabbot, from ''ComicBook/GoldDigger'', though his version is a bit worse in that while he can copy any move he sees, he still has to figure out how best to use it, so some highly specialized moves would get him in more trouble than they're worth if he used them.
* The Super-Adaptoid can copy the powers of any superhuman it fights. In the ComicBook/MarvelAdventures series, it could also think like its target - which meant once it had copied the Avengers, it no longer wanted to fight, seeing them as the good guys now.
* In the ''ComicBook/{{Guardians of the Galaxy}}'' future of the Marvel Universe, The Protege has this ability for all inherent abilities, with no restrictions and can combine them. Needless to say, she quickly becomes the most powerful being in her universe. Eventually, she tries to use these to become the new One-Above-All before getting smacked down by the Living Tribunal.
* Over in Franchise/TheDCU, we have the android Amazo (created 6 years before the Super-Adaptoid), who has this ability. Just to make things tougher for the heroes, sometimes he comes with powers pre-programmed, and then copies some more. Amazo's power is taken to [[AGodAmI the ultimate level]] in the Franchise/{{DCAU}}.
** Also in the DCU, we have Libra. Who first appeared as a minor Franchise/{{Justice League|of America}} villain in the 70's, before Creator/GrantMorrison got hold of him and had him as one of the main villains of ''ComicBook/FinalCrisis'', being pretty much responsible for all the evil not committed by [[BigBad Darkseid]] personally, including for the [[spoiler: almost]] death of Lois Lane.
** Also also in the DCU, the Parasitic Teutons of Assimilation, or PTA. [=WASPs=] engineered with the ability to copy any superpower they see in action. Their exact origin is a mystery, but be honest: would you really want to know?
** There's the relatively minor villain Paragon who can copy the powers of everyone near him at heightened levels. So if you have SuperStrength, he gains greater SuperStrength. The only reason he hasn't taken over the world is because he only retains his copied powers while the source of them is nearby.
* ComicBook/MegaMan of Archie Comics. It's pretty accurate to games, though also a source of angst as Rock is inherently a pacifist who is gaining ever more powerful weapons.
* The Absorbing Man, a longtime opponent of ComicBook/TheMightyThor, is a villainous example. He can absorb the physical characteristics of anything he touches, whether inanimate substances like steel and concrete or even other people like ComicBook/TheIncredibleHercules. This ability makes him a dangerous opponent, but it also means he often absorbs the weaknesses of whatever he's touched. Most of his defeats come from heroes who exploit this.
* ''Duplicate Boy'' from the Legion of Substitute Heroes is unable to join the Legion of Super Heroes because he can only duplicate the powers other heroes have, and each Legion member must have a unique power. However, his ability is shown to have limits when he tries to duplicate the powers of an immensely powerful foe and is unable to, instead fainting from the effort.
* The Midnight Sons [[BatFamilyCrossover crossover]] ''Midnight Massacre'' has Comicbook/{{Blade}} of the Nightstalkers, in his quest against all occult, reading a certain page from the [[TomeOfEldritchLore Darkhold]] and turning into Switchblade the Demogorge, who obtains the powers of anyone he kills. [[spoiler:[[HoistByHisOwnPetard This power proves to be his undoing]] when kills Comicbook/GhostRider, and feels the power of his Penance Stare as he obtains it, buying enough time for Prof. Hastings of the Darkhold Redeemers to fix things up.]]
* Wildcard from ''ComicBook/StrikeforceMorituri'' could duplicate the ability of a nearby Morituri subject.

[[folder:Fan Works]]
* Road Roller Extreme from [[http://fav.me/d4a27sp Super Milestone Wars]], a {{super robot|Genre}} that can assume the power or MechaExpansionPack of any other super robot in fiction.
* In the AlternateUniverse Literature/{{Twilight}} fic {{FanFic/Luminosity}}, Addy can, upon physical contact, perfectly replicate the powers of any person with special abilities (called "witches"). She can only hold one at a time, however.
* ''Fanfic/SOE2LoneHeirOfKrypton'': In this crossover ''[[Comicbook/{{Supergirl}} Asuka]]'' and ''[[Comicbook/WonderGirl Rei]]'' fought the ''[[Franchise/{{Superman}} Parasite]]'', a mutated human copied his victims' powers and stole their memories and energy by touching them.
* In the ''VideoGame/{{Touhou}}'' FanFic [[FanFic/ImperfectMetamorphosis Imperfect Metamorphosis]], [[spoiler:Rin Satsuki can absorb other people]]. By doing so, she becomes able to replicate their powers and appearances.
* Another Touhou Fanfic, Fanfic/TouhouDoujinDawitsusFolly has OriginalCharacter Dawitsu as a youkai 'mimicker', who uses his {{Otaku}} knowledge to form a varied arsenal of video-game and anime-based attacks, as well as copying the Touhou cast's abilities...
* The gloriously bonkers Anime/NeonGenesisEvangelion CrackFic ''ALittleAngelOnMyShoulder'' has the Instrumemory system, which is a bit different from most examples of this trope since it involves the Shoulder Angels (basically pint-sized ghosts of the canon Angels) temporarily merging with the Eva to allow it to borrow the Angel in question's abilities.
* In the ''FanFic/PonyPOVSeries'', it's revealed that Twilight's ability to learn any spell after witnessing it is because this is a special ability of the Element of Magic. [[spoiler: Since Trixie is another Element of Magic, she's able to do likewise. Dark World Rarity gains this ability after absorbing the Element of Magic.]]
** ''FanFic/ThePowersOfHarmony'' likewise has this as one of the abilities granted to the Bearer of Magic.
* In ''WebAnimation/TurnaboutStorm'', coming into contact with [[Franchise/AceAttorney Phoenix Wright's]] [[LieDetector Magatama]] accidentally gives [[WesternAnimation/MyLittlePonyFriendshipIsMagic Twilight Sparkle]] the ability to see Psyche-Locks, effectively turning her into a LivingLieDetector.
* In ''FanFic/RainbowDoubleDashsLunaverse'', the Element of Magic [[AlternateUniverse there]], Trixie Lulamoon, is able to learn spells "by ear"; that is, she learns how to cast spells by watching other ponies do it. Unfortunately, she's not very good at learning spells via spellbooks.
* In ''Fanfic/OpeningDangerousGates'', the demon twins can copy their opponent's power level and skills, but it takes some time to work. Since they started out weaker than him, Grimmjow got cocky, giving them enough time to match his power. He beats them anyway.
* In ''FanFic/RWBYReckoning'', [[AuthorAvatar Darrel's]] Semblance is this. By touching an ally or enemy, he can copy their unique ability (i.e. Ruby's SuperSpeed, Blake's FlashStep), and use it to his own desire, though he can only do it once, and can only hold one power at a time.
* The ''Fanfic/SuperwomenOfEva'' series' initial (and unlike most of the others not based on a DC or Marvel character but an original idea) heroine Spirit (created by Mike313 has the ability to absorb angel DNA to acquire their powers in addition to her FlyingBrick and regenerative abilities. However, unusually for this trope, Hikari does not make use of this power much aside from her initial acquisition of Sachiel's ability to fire cross shaped energy blasts, which she has in every appearance as one of her trademark attacks (which is a lot; Spirit is probably the series' most frequent guest hero, appearing in multiple stories, by all 3 authors). Which means she's somewhat lacking in power compared to [[spoiler:Her evil counterpart, Rei III who has the power of many angels.]] She does, however, also take Bardiel's ability to take over Nerv weapons [[spoiler:which she uses to seal Rei III in bakelite]] in her title story, and in orionpax09's ''[[Fanfic/SOELilithsHerald Lilith's Herald]]'' (Rei as Marvel's Silver Surfer) Hikari accidentally takes Sahaquiel's ability to fire explosive projectiles of its own mass (in Spirit's case her feathers).
** In the latest chapter of ''[[Fanfic/SOELilithsHerald Lilith's Herald]]'' Spirit finally willingly makes use of this power and copies the powers of most of the previous Angels fought thus far through DNA samples Rei obtained for her, making her similar in power to her final foe in the Spirit story, although it manifested differently (that enemy mostly used its hands to wield its power while Spirit creates energy whips from her hair, and fires Ramiel's focused energy beams from her eyes). Conveniently the Angels that had no powers like the 6th (which was a big whale thing that just crashed into stuff) or the 8th (which just sat in a volcano doing nothing) were the ones Rei couldn't sample.

[[folder:Films -- Animation]]
* Po from ''WesternAnimation/KungFuPanda'' learns the Wuxi finger hold, and a technique to manipulate water droplets after watching them once. His master Shifu is a little bit jealous.

[[folder:Films -- Live-Action]]
* Alice in ''Film/ANightmareOnElmStreet4TheDreamMaster'' is an interesting example. ''She'' is the one who gains the powers of her friends even though ''Freddy'' is the one doing the killing.
* In the movie ''Film/{{Limitless}}'', the main character becomes a master martial artist by remembering and copying the martial arts movies he has seen.
* Zen in ''Film/{{Chocolate}}'' is an autistic girl who learned martial arts, mostly Kung Fu, from watching TV. Late in the movie she's stymied by a fighter using a [[ConfusionFu drunken monkey technique]], and has to take a few licks before she adapts the form.
* The purpose of Weapon XI in ''Film/XMenOriginsWolverine'', creating the perfect mutant-killer.

* [[Literature/LorienLegacies This is where Ximic is all about]]. The user can copy other Legacies, by simply having it experienced from another one using it. As such it is the most powerful Legacy, and also most rare.
* All of the competent channelers in ''Literature/TheWheelOfTime'' series do this on a regular basis. Some of them even do it to each other when they intuitively leap to new things (specific example: when Egwene ties off a weave but can't figure out how she did it, then Elayne learns from her, and Egwene watches Elayne do it so that she can repeat it).
* Protagonist Lire of ''Deadly Remains'' lives in a world where magic and PsychicPowers are real and [[TheUnmasquedWorld publicly known]]. She normally has the power of {{Psychometry}} (read the thoughts of a person who handled an object). By touching the remains of three psychic murder victims (to read them), she gains the powers of [[MindOverMatter telekinesis]], [[PlayingWithFire pyrokinesis]], and [[AnIcePerson cryokinesis]]. With practice, she gains the ability to [[AllYourPowersCombined combine the abilities]].
* Unique among the Thirteen Orphans in ''Literature/BreakingTheWall'', Albert Yu, representing the Cat, is able to temporarily mimic the status and abilities of any one of the other twelve traditional places on the EasternZodiac.
* [[GooGooGodlike Baby Prudence]] of Literature/TheParasolProtectorate combines this with a form of PowerNullifier. Her touch reverts werewolves and vampires to their mortal states and allows her to use their powers until the sun rises or she is touched by a [[TheSoulless Preternatural]], at which point she and her victim return to their previous states. The effects are also connected to her current target; If she strays too far [[spoiler: or the victim dies]], she returns to her natural form.
* General Grievous' mastery of lightsaber combat is explained in the novelization of ''Film/RevengeOfTheSith''. The computer in his brain analyzes his opponent's fighting style and allows him to utilize it himself, even Mace Windu's unique Vaapad. This ends biting him in the ass when the GenreSavvy Mace Windu sicks Obi-Wan on him, as his foe is the master of an incredibly basic style focused on blocking everything and is at least knowledgeable in the other styles, [[ScrewThisImOuttaHere resulting in Grievous' retreat]] after Obi-Wan [[NoSell negated his attacks]] until he grew bored and cut two of his wrists.
* In ''Literature/TheLegendOfSunKnight'', Creus, the Sun Knight in question, is able to learn any magic spell just by watching it. Including Necromancy. Which the Sun Knight is not supposed to know. Oops.
* In Creator/SergeyLukyanenko and Creator/NickPerumov's ''Literature/WrongTimeForDragons'', a [[ChosenOne Dragon Slayer]] can absorb and, eventually, use ElementalPowers. In fact, to become a true Dragon Slayer, he must absorb the powers of all four elemental clans. The [[AnimalMotifs totem clans]] don't count, apparently.

[[folder:Live-Action TV]]
* ''Series/BuffyTheVampireSlayer'': Severin gains Illyria's power over time and space.
* ''Series/{{Heroes}}'' :
** Sylar and Peter Petrelli both are able to acquire new powers from other evolved humans. Peter just has to remember how that hero made him feel. Notably, Peter has an easier time getting new powers, [[HowDoIShotWeb he has trouble getting some powers to work]], and trouble [[PowerIncontinence getting other powers to turn off]]. Sylar for mst of the time is a PowerParasite that kill people to steal their powers. Later, he learns how to gain abilities without removing a person's brain, obtaining Elle Bishop's power of electric manipulation by empathizing with her and convincing her to let go of her anger. Despite possessing this ability, he has returned to killing to obtain new powers..because StatusQuoIsGod.
*** As of Volume 4, they've significantly nerfed Peter's ability to where he [[DiscardAndDraw can only keep one power at a time]] so as to cancel out his StoryBreakerPower.
** In the graphic novels, one character, Linda, has a power that allows her to see the auras of people around her, and seemingly absorb them. Not only does it happen to absorb superhuman powers, but it allows her to kill them as well. Nifty. Unfortunately, she [[DroppedABridgeOnHim got a bridge dropped on her]] in her very first appearance, and didn't do anything too spectacular in the two other comics she appeared in (thanks to AnachronicOrder). Ah, well.
** Like Taskmaster, Monica Dawson's power is to be able to perform any physical feat she sees, from cutting a tomato into a rose like the TV chef to pulling wirework-style Kung Fu from action flicks. She receives a Blackberry with videos of various skills (plumbing, fighting, flying airplanes, etc) that she can watch to copy any time she needs to.
* A number of examples from ''Series/{{Charmed}}''.
** This was the main ability of Warlocks, the MonsterOfTheWeek enemies from the show's early seasons, which was their primary motive for hunting and killing witches. Despite their potential for leveling up, they were pretty much at the bottom of the SortingAlgorithmOfEvil because they were mostly too weak to kill anything with substantial power (such as a demon).
** Zankou, the second-most-powerful demon in existence and the BigBad of Season 7, demonstrated the ability to absorb the powers of those he kills, but only really used this ability once.
** Cole, after being sent to the demon afterlife, managed to avoid disintegration and found he could absorb the lingering powers left behind by all the demons sent there to be destroyed. Eventually he absorbed enough powers to kill the serpent that devoured the souls sent there and was able to return to earth, with a ridiculously large array of random abilities.
* ''Franchise/KamenRider'':
** Kamen Rider Raia, from ''Series/KamenRiderRyuki'' has an Advent Card that allows him to copy the weapon of another Rider.
** The Riders in ''Series/KamenRiderBlade'' have access to the Rouze Card system. This allows them to seal an [[MonsterOfTheWeek Undead]] into a card and use this card to utilize the power of said monster to a limited extent. IE, using a card of a lightning-wielding deer monster allows the Rider to shoot a blast of lightning himself. Played even straighter with the Joker Undead, who is able to use aforementioned cards to gain the form of the sealed Undead, including all of its powers and abilities. [[spoiler: In this case, borrowing these forms overwrites the identity of the Joker Undead, as using the form of the Human Undead causes him to become Aikawa Hajime.]]
** The Cassisworm Gladius from ''Series/KamenRiderKabuto'' has the ability to absorb the finisher attacks from the Kamen Riders, enabling him to use stronger versions of said attacks. However, he can't use this skill when he is simultaneously hit with multiple finishers. To a lesser extent, the [[MonsterOfTheWeek Worms]] are able to fully copy human beings, including memories and skills.
** In ''Series/KamenRiderDecade'', the eponymous hero possesses the ability to transform into one of his nine predecessors (Series/{{K|amenRiderKuuga}}uuga [[Series/KamenRiderAgito t]][[Series/KamenRiderRyuki h]][[Series/KamenRiderFaiz r]][[Series/KamenRiderBlade o]][[Series/KamenRiderHibiki u]][[Series/KamenRiderKabuto g]][[Series/KamenRiderDenO h]] Series/{{K|amenRiderKiva}}iva), gaining all the abilities and equipment that comes with them. ''His'' limitation is that he can't gain the other Riders' powers until he [[AnAesop understands them]]. He retains his own TransformationTrinket belt, since his powers operate by using a [[CardBattleGame card reader in the buckle]].
** ''Series/KamenRiderOOO'' uses a similar concept, with the main character having to take Core Medals from the {{Big Bad}}s this series, the Greed, in order to use the powers contained in them. ''Most'' Franchise/{{Kamen Rider}}s have some element of PhlebotinumRebel, but OOO is probably the only one whose powers are ''chunks of'' his villains instead of merely made by them.
** Series/KamenRiderFourze offers a villainous example in the form of the Leo Zodiarts, who can change into any of the other 11 Horoscope Zodiarts by using their Astro Switches.
** Series/KamenRiderGaim's SuperMode Kiwami Arms, unlike the other Rider forms in this series, doesn't have its own unique weapon. Instead, it has the ability to use everyone else's weapons at will -- and can even use them better than their original owners, primarily by DualWielding (either duplicate copies of the same weapon, or two different weapons at the same time).
* And then ''Franchise/SuperSentai'' got in on the act. In ''Series/KaizokuSentaiGokaiger'', the heroes have a stash of Ranger Keys, which unlock the powers of previous Sentai teams. Exactly like Decade and his cards.
** And of course, when [[Film/KamenRiderXSuperSentaiSuperHeroTaisen both franchises had a Big Dang Crossover]], one of the main selling points was Decade and [=GokaiRed=] using their copied powers against ''each other''.
* ''Franchise/StarTrek'': The Borg have the ability to assimilate technology and knowledge from other species. It is at the very core of their philosophy.
-->Resistance is futile.
* In one episode of ''Series/StargateSG1'', the planet of the week features a civilization with nanites in their brain. They have child prodigies learn everything they can about a certain subject (one character is an 11-year-old expert on Naquadah reactors). When they reach a certain age, the nanites are harvested and distributed to the other members of the species, and suddenly everyone with a nanite has that knowledge. The downside is that removing the nanites causes their original possessor to regress to an infantile state and adding new nanites doesn't work.
* In Series/UltramanGinga Hikaru can transform into previous [[Franchise/UltraSeries Ultra]] Heroes and Monsters, by scanning the [[LivingToys Spark Dolls]] with his [[TransformationTrinket Ginga Spark]]. Interestingly enough the Spark Dolls are actually the sealed forms of the previously mentioned [[SealedGoodInACan Heroes]] and [[SealedEvilInACan Monsters]] instead of a replica of their powers.
* The title character of the short-lived 80s show ''Series/{{Automan}}'' could duplicate any skill he'd seen used at least once.
* In the first season of ''Series/WhoWantsToBeASuperhero'', the winner, Feedback, has the ability to absorb powers and abilities from video games.

[[folder:Tabletop Games]]
* Every major Superhero RPG ''ever''. ''DC Heroes'' (the eighties/nineties version from Mayfair Games) had both Mimic, which copied powers, and Power Drain, which gave them to the user while removing them from the target. ''Champions'' characters with this ability were and still are most typically built with a Power Pool (a point reserve to be assigned to actual powers at appropriate times) with appropriate special effects and limitations. ''Marvel Super Heroes'' had relevant powers in its various editions and sourcebooks...the list goes on.
* In ''TabletopGame/VampireTheMasquerade'', a vampire can steal another vampire's power by devouring the vampire's soul. The game considers this act, called Diablerie, to be a Very, Very Bad Thing, especially in the eyes of the Camarilla... Though they mostly dislike it for the precedent it sets.
* ''TabletopGame/WerewolfTheApocalypse'' gives the Ragabash (sneaky, trickster werewolves) the Thieving Talons of the Magpie Gift, which allows them to temporarily copy any supernatural power they witness.
** The successor game, ''TabletopGame/WerewolfTheForsaken'', gives the Irraka (also sneaky werewolves) a Milestone Gift that allows them to do the same thing ''permanently,'' as long as they witness the power on multiple occasions and make the right expenditures of Willpower.
* In ''TabletopGame/{{Exalted}}'', Eclipse Caste Solars and Moonshadow Caste Abyssals can learn the Charms of other types of Exalted, as well as Charms unique to spirits. The catch is they have to be taught the Charm by an Exalt of that type (or Spirit) who knows it.
** Apostate Alchemicals have a Charm that physically tears off the Charms of other Alchemicals and bolts the stolen device to their own form. This cruel enhancement, known as Flesh and Steel Transference Mechanism, was nicknamed "Mega Man Method" during development.
** There is a high-level charm that allows you to copy ''every'' power that a being possess. You can even use powers that you normally can't ever learn, such as Sidereal Martial Arts or Lunar Knacks. The bad news is that that charm belongs to [[GodOfEvil The Ebon Dragon]].
* ''TabletopGame/DungeonsAndDragons'':
** In the book ''Serpent Kingdoms'', the Sarrukh has an ability called "Manipulate Form" which can permanently imbue any reptilian creature with its own physical features and powers. This forms the basis of the infamous GameBreaker character "Pun-Pun", which can copy ''everything in the universe at the same time'', [[UpToEleven with the power increased as much as he wants]]. By some interpretations of the rules he can even ''make up'' things to copy. Oh, and this can be done at 1st level (although only in the ''TabletopGame/ForgottenRealms'' universe). It is an important lesson in what happens when you take the rules literally.
** The Illithid Savant is an illithid prestige class who can [[CannibalismSuperpower permanently gain the abilities of any creature]] [[BrainFood whose brain it consumes]]. As you can assume, it's considered one step below Pun-Pun in the pantheon of [[GameBreaker What The Hell Were the Designers Smoking]], mainly because its racial prerequisite requires LoopholeAbuse for most.
** Less broken, the Spellthief class in edition 3.5 has a temporary, [[VancianMagic disposable]] version of Power Copying, by stealing spells directly from other spellcasters' minds.
** The Ardent Dilettante PrestigeClass, from the ''Planar Handbook'', has a high-level ability called "See It Again" that allows to duplicate once any spell the character has been targeted with in the previous round.
** Another PrestigeClass, the Ur-Priest, beyond stealing clerical spells from the gods without worshiping them, at maximum level can copy the spell-like abilities of another creature.
* ''TabletopGame/Warhammer40000'' :
** The Tyranids do something similar to Power Copying. When they turn their opponents into the raw materials to make more Tyranids, they also absorb their information and occasionally their traits; these are then used by the hive fleet to make it easier to counter those tactics and abilities. Some sources also hint that some varieties of Tyranid were "invented" using the DNA of certain foes, such as the psychic Zoanthropes (believed to have come from Eldar DNA) and the durable Tyrant Guard (supposedly created with Space Marine DNA).
** The Kroot also do something like this. They consume their slain enemies, and any useful traits are incorporated into the Kroot's DNA (which is mostly blank apart from their natural traits). Over a few generations, the traits gained from consumed enemies become a natural part of the Kroot's biology.
*** The Kroot Shapers are shamans within tribes that direct what they eat, to ensure only good traits are retained and not detrimental ones. This came after one section of kroot decided it would be good to assimilate canine DNA, and getting trapped in an evolutionary dead end. The current Kroot themselves are actually not the base race, they use to be a type of scavenging bird before consuming a humanoid race.
** The Space Marines themselves possess an oft-forgotten organ, the omophagea, that allows them to learn a bit from any creature by consuming some of their mass. Brain works best, but not always necessary.
* The [[VariantChess chess variant]] ''Plunder Chess'' allows pieces that capture other pieces to use the captured piece's move once.
* There's also the gruesome ''TableTopGame/{{Pathfinder}}'' spell, Blood Transcription, which requires you to "consume" a pint of blood from a dead spellcaster, allowing you to learn one of their spells, provided your class can learn it. Needless to say, this spell comes with an 'evil' descriptor.
* In ''TableTopGame/MagicTheGathering'', there's a number of creatures that copy individual creatures, but for simple sharing of powers, [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=107385 Experiment Kraj]] and to a lesser extent, all Simic cards share their abilities through Cytoplasts.
** [[http://gatherer.wizards.com/Pages/Card/Discussion.aspx?multiverseid=207876 Necrotic Ooze]], [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=262852 Havengul Lich]] and (to a lesser extent) [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=140171 Cairn Wanderer]] all directly copy the abilities of creatures in any Graveyards.
* Excrucian Deceivers in ''TabletopGame/{{Nobilis}}'' are capable of completely copying all the abilities of people they know very well, through the Ritual of the Second Skin. This comes with a number of drawbacks: The ritual takes a full day to perform, it copies all of the target's limitations and weaknesses, and anyone who commands the Deceiver in the name of the person whose skin they're wearing can force them to follow a single order. Still, it's one of the most dangerous abilities in the game for the sheer versatility it grants them.

* In ''Theatre/PokemonLive'', [=MechaMew2=] has the ability to learn and amplify any Pokemon's attack.

* ''Toys/{{Bionicle}}'':
** The [[MaskOfPower Mask of Kindred]] allows the wearer to copy the abilities of animals sharing the general environment with them (so land animals if the user is on land, sea animals if they're diving, etc).
** The Mask of Emulation, which allows the wearer to use any power he can watch someone else using.
** One minor character has the ability to become the master of any activity he sees being performed. This doesn't encompass powers, but it does let him, say, become proficient in the melee fighting style of his opponent. And be better at it.
** Vezok can absorb powers used against him. He can also combine them, though it's unclear how long he can keep one power.
** Krahka can [[VoluntaryShapeshifting change her form at will]], and unlike other shapeshifters she can also use the powers of the copied form. Krahka can combine several forms and powers at once, to the point that she can create a [[AllYourPowersCombined Toa Seal]] on her own as long as she copies six different ElementalPowers. As with Vezok, the exact limits of this ability is unclear.
* The Mega Man action figures (based on the [[WesternAnimation/MegaMan Ruby-Spears animated series]],) has this as its main feature. Every robot figure in the line can replace one hand with a spring loaded arm cannon (though only a couple actually COME with an arm cannon) and all the various weapons are completely interchangeable, which not only allows Mega Man himself to do his thing, but many other wild combinations--like having Cut Man fire plasma shots, bombs, or even Guts Man's fire hydrant from his head.

[[folder:Video Games]]
* Franchise/MegaMan has the ability to utilize the weapons of the various Robot Masters that serve as the bosses for the series--though there is some occasional alteration for the sake of gameplay or other compatibility issues. Almost all his [[LegacyCharacter successors]] and AlternateUniverse counterparts either have this ability direct or use something based off the same concept.
** Taken [[UptoEleven up to the extreme]] in ''VideoGame/MegaManZero 4'', where you can take each and every one of the mook's weapon using your [[TrickedoutGloves Z-Knuckle]].
** Similar to the above, the [[VideoGame/MegaManBattleNetWork Battle Network]] series introduces [[PowersAsPrograms battlechips]] which are most commonly acquired by defeating an enemy and most commonly involve using that enemy's attack. What's notable is that this is a basic ability of all characters and enemies but for the most part all characters except the main character prefer to use abilities directly related to themselves rather than the wider array of battle chips they could have.
*** Then taken further with the various soul systems introduced in later games where Mega Man gains the ability to mimic the appearance and properties of other characters in addition to using battlechips.
** [[VideoGame/MegaManBattleNetWork Bass.EXE]] has his Get ability, which he uses to absorb data to gain more power and abilities, not unlike his Classic counterpart. Which is inherited in ''VideoGame/MegaManStarForce'' by the Geo Stelar/Omega Xis fusion Mega Man. If you curbstomp mooks with sufficient skill, you gain a battle card representing their attack. Usually you can use it ''better'' than they can - in ''2'', the Mettenna's [=GrndWave1=], for example, does a lot more damage in Geo's hands ''and'' can hit multiple targets.
* ''Franchise/{{Kirby}}'', the eponymous star of his own Nintendo video game series and the anime ''Anime/KirbyRightBackAtYa'', copies the power of any enemy he can successfully eat, except for in the first game.
** This also carried over to ''VideoGame/SuperSmashBros'', although he can't really eat his enemies. He also only copies one move of the inhaled opponent, which replaces his Inhale move until you decide to drop the ability by taunting or if you take enough damage from the opponent(s).
** In ''VideoGame/KirbySuperStar'', he can even use the ability to create a "Helper", an ally with similar abilities to the enemy that commonly has the skill (often a PaletteSwap). The helpers themselves has a bit of Power Copying; if one's health is reduced to zero, they begin to glow before exploding. In this state, they simply need to touch an enemy to turn into that enemy's respective helper and completely restore their health to boot. One of the abilities also allows Kirby to copy powers by scanning the enemy rather than inhaling them. This is rather pointless for Kirby, but gives the Helper even more freedom.
*** [[TheDevTeamThinksOfEverything Said ability can actually be used on Scarfies to get Crash (as they can't be inhaled)]]. It can also be used to gain the power of a boss/mini boss before defeating them.
** Played with in Milky Way Wishes, where Kirby cannot copy enemies by eating them. Kirby has to find them in capsules hidden throughout the levels, which lets Kirby can select that ability at any time from the pause screen, much like ''VideoGame/MegaMan''. [[spoiler: The "scanning" version of Copy still works, which makes it much more useful - [[GuideDangIt if you know where to find it.]]]]
* Some games in the ''VideoGame/HeroesOfMightAndMagic'' series feature the skill Eagle Eye, which allows the hero to learn spells by watching the enemy hero cast them in battle.
** Considering that since you learn them from enemy heroes and are likely to conquer the towns they learned them from, skilled players more or less ignore it for better skills such as Wisdom, which is needed to learn the higher level spells to begin with. And generally the highest level spells you could get was level 4.
** In V, this also works against spellcaster creatures, as they use the same spells. However, in neither case Eagle Eye allows heroes to learn spells that require the respective magic skill (3rd to 5th cycle) or abilities unique to the hero class (Barbarian heroes, who use War Cries instead of magic, can learn War Cries but not magic with a similar skill).
* ''VideoGame/{{Metroid}}'': Samus's Power Suit has the ability to integrate foreign technology if it encounters something useful. To wit:
** In ''VideoGame/MetroidPrime'', Samus gets her Plasma Beam by copying what was apparently originally a beam used by the Space Pirates for mining.
** Samus gets a missile expansion from the Dark Missile Trooper in ''VideoGame/MetroidPrime2Echoes''. The Ing item guardians are a double example; after they [[BagOfSpilling steal your equipment]] at the beginning, you can see them using it when they fight you, then you kill them to get it back.
** In ''VideoGame/MetroidPrime3: Corruption'', the Nova Beam is collected after destroying a mining platform that was using it.
** Also in ''Corruption'', defeating each of the [[spoiler: corrupted bounty hunters]] yields an upgrade based on their powers. [[spoiler: Rundas]] gives ice missiles, [[spoiler: Ghor]] gives the Plasma Beam (which is explicitly stated to be his main weapon), and [[spoiler: Gandrayda]] drops the grapple voltage.
** ''VideoGame/MetroidFusion'' has this trope with nearly every boss. You get the Morph Ball from the first boss that can curl up into a ball and charge at you, the Gravity Suit comes from an enemy that can manipulate gravity, the Plasma Beam is acquired after you kill a plant that shoots lasers at you...
*** [[spoiler:Because these bosses have once possessed her power armor.]]
** In ''VideoGame/MetroidPrime'', the Space Pirates invert this on Samus. They reverse-engineer Samus' beams, and unleash troopers outfitted with these counterparts at her.
* Batman does this to some degree in the VideoGame/BatmanArkhamSeries.
** In ''VideoGame/BatmanArkhamCity'', he takes [[spoiler:freeze grenades from Mr. Freeze's equipment after defeating him]].
** In ''VideoGame/BatmanArkhamOrigins'', he takes the Remote Claw from [[spoiler:Deathstroke]] and the [[spoiler:Shock Gloves from the Electrocutioner after his death]].
* In ''VideoGame/{{Infamous 2}}'', Cole becomes able to take on some of the powers of another Conduit about halfway through the game: either Kuo's [[AnIcePerson ice powers]], or Nix's [[PlayingWithFire control over oil and fire]].
** The protagonist of ''VideoGame/InfamousSecondSon'', Delsin, has the ability to take on the powers of other Conduits.
* In the ''Franchise/{{Disgaea}}'' series, characters are able to learn magic, weapon skills, and abilities from others on their team through different methods, depending on the game.
** In the [[VideoGame/DisgaeaHourOfDarkness first]] [[VideoGame/Disgaea2CursedMemories two]] games, only magic could be learned via the master and student system, which allows a character to use the spells of an adjacent unit if they were the ones who created them. The spell would be learned permanently with enough uses.
** ''VideoGame/Disgaea3AbsenceOfJustice'' introduces the Class World, where a character who's leading a school club can learn the magic, weapon skills, and abilities (Or "evilities", as they're called in-game) possessed by any characters in the same club, albeit for a much higher price then what they purchased them for. It also gives [[VideoGame/Disgaea2CursedMemories Yukimaru]] a unique primary evility that makes her to copy the primary evility of a target she kills.
** ''Dark Hero Days'' adds the Magichange 2 ability, which allows a humanoid character to use the special attacks of the monster who performs it on them.
* Many variations on Blue Mage (incidentally the same color as the former {{Trope Namer|s}}) from the ''Franchise/FinalFantasy'' series of games work like this. The precise variant varies from game to game -- sometimes, they have to be hit by the ability, and in others they merely have to be in the party when the ability is used, and some have to do something special related to killing the enemy to do it (''VideoGame/FinalFantasyX'' has you use an Absorb-like spell, while ''VideoGame/FinalFantasyIX'' has you eating and cooking enemies). ''VideoGame/FinalFantasyVI'' specifies that the Blue Mage has to ''see'' the spell being cast, so he can't learn anything if he's [[StandardStatusEffects Blinded]]. In a variation on the theme, Summoners in the series often must defeat prospective summons in combat before being allowed to summon them.
** Another variant is the Mime, who can repeat the last action taken by an ally, no matter what it was, with no MP or item cost.
** Blue Mages in [[VideoGame/FinalFantasyXI Aht Urhgan]] are able to use monster abilities because ''[[BodyHorror monster parts are grafted onto their body]]''. Story-wise, becoming a Blue Mage is akin to [[DealWithTheDevil selling your soul]].
** This is how Ramza learns the Ultima spell in ''VideoGame/FinalFantasyTactics'', having to get hit first, with [[GuideDangIt very few opportunities to learn the spell because few enemies can cast it]]. You need to be a Squire when hit by it, and be careful not to be turned into a frog or charmed instead. [[spoiler:It's also theoretically possible, though extremely unlikely, for his sister Alma to learn Ultima in the same way from the FinalBoss.]] Likewise, summoners learn the hidden ultimate summon in this manner. There are some other spells that can work like this (the level 4 spells, most high end summons), but those can also be learned normally, which is generally less troublesome.
** Enemy Skill materia in ''VideoGame/FinalFantasyVII'' also lets you learn a, well, enemy's skill that is used on you. Also the Mime materia, which when equipped lets you copy what ever move was just used. This included summons and [[LimitBreak Limit Breaks]], although the latter wouldn't work if it wasn't yours.
** Also inverted by a boss in ''VideoGame/FinalFantasyV'', he can learn Blue Magic from your party. [[AnticlimaxBoss Including]] [[CrowningMomentOfFunny Self-Destruct.]]
** Gau's Rage ability from ''VideoGame/FinalFantasyVI'', which he can use each individual enemy abilities which can be learned at his home habitat in the Veldt.
** ''VideoGame/FinalFantasyX's'' Blitzball mini game allows the players of your team to mark and learn new abilities from the players of the opponent team.
* Shanoa in ''VideoGame/CastlevaniaOrderOfEcclesia'' is able to perform power-copying feats by absorbing magical glyphs. In several cases, she can steal a monster's magic in the middle of battle. [[spoiler:She even ''kills a boss'' this way.]]
** Don't forget Dmitrii from ''[[VideoGame/CastlevaniaChroniclesOfSorrow Dawn of Sorrow]]'', who can copy ''Soma's'' magic souls by being hurt by them... However, it makes him a pathetically easy boss if you know what soul to use on him - he ''will'' copy that attack, no matter what it is, so making him use a weak and easily avoidable attack makes the battle a cakewalk. Later on, [[spoiler:it turns out that by having his soul absorbed by Soma, Dmitri was able to copy Soma's power of domination, at which point he becomes the game's GreaterScopeVillain]].
** And of course we have Soma himself who has the ability to steal the soul and abilities of ANY ENEMY IN THE GAME (That's saying something in a ''Castlevania'' game). This allows you to gain an attack or special property for as many as there are different enemies in the game (with some extras).
** Charlotte, from ''[[VideoGame/CastlevaniaPortraitOfRuin Portrait of Ruin]]'' can learn certain enemy attacks if she absorbs them using her Book of Binding, which improves the books' standard abilities as well as allowing her to cast those attacks back.
* In ''VideoGame/XMenVsStreetFighter'', Rogue's power-stealing abilities are represented as a special move that allows her to copy one of her opponents' special moves by kissing them. In ''VideoGame/MarvelVsCapcom2'', this power couldn't work because there were 56 characters total, so instead it gives Rogue a bonus to various stats like Attack, Defense, Speed, or Health.
** [[CrowningMomentOfAwesome She can also steal the Shun Goku Satsu and use it]].
* ''VideoGame/MusashiSamuraiLegend'' allowed you to copy the moves of any enemy by completing a button-press sequence.
** The game to which ''Samurai Legend'' is a SpiritualSequel, ''VideoGame/BraveFencerMusashi'', also allowed Musashi to copy enemy moves by absorbing the enemies into his shortsword, the aptly-named Fusion. He could only hold one at once, though, as opposed to Samurai Legend's version being able to learn as many as he pleases.
* In ''VideoGame/PlayStationAllStarsBattleRoyale'', Sackboy's level 1 super consists of him either turning into Nathan Drake, Parappa, or Cole Macgrath. when the level 1 super is activated Sackboy will use a special ability from the character he is disguised as.
* The ''Franchise/{{Pokemon}}'' series has a number of examples:
** Mirror Move and Copycat mimic the last move used by an opponent, while Me First can mimic an opponent's move ''before they use it''.
** Mimic teaches the user one of the opponent's moves for the duration of the current battle, allowing them to use it up to five times.(though the gen IV Mimic glitch could make it permanent.)
** Sketch teaches the user one of the opponent's moves ''permanently'', and is exclusive to the Pokemon Smeargle, who learns a new Sketch every ten levels. With enough time and effort, a player can potentially teach Smeargle ''any move in the game'',(except Struggle or Chatter) although Smeargle is by no means a strong fighter. A male Smeargle can thus be used to breed any desirable move onto any baby Pokemon in a compatible breeding group.
** Ditto can use the moves of whatever it transforms into for that battle. So can Mew and Smeargle (the latter only if it has sketched Transform).
** The ability Trace (used by the Porygon and Ralts lines, as well as Mega Alakazam) copies an opponent's ability when the user enters the battle. The Porygon line also has Conversion to copy the opponent's type during the first generation games.
* In ''VideoGame/SonicAdventure2'', Sonic is able to use Shadow's ability of Chaos Control after seeing him use it just once.[[note]]It's implied that Sonic could always use Chaos Control, but he wasn't aware and/or [[HowDoIShotWeb didn't know how to]].[[/note]]
** ''VideoGame/SonicChronicles'' gives us the Gizoids, of which Emerl was the most powerful. Though unlike Emerl, who doesn't seem to have a limit in what he can copy, the Gizoid {{Mooks}} are only capable of copying one or two special attacks from the main characters.
** The final boss of ''VideoGame/SonicHeroes'' copies Chaos Control from Shadow, Chaos' ability to manipulate water (Though in this case, he uses metal) from Froggy and Cheese and everyone elses' own powers.
*** Said final boss, Metal Sonic, started this trend earlier with ''VideoGame/SonicTheFighters'' as he could use a certain attack from the playable characters during his fight.
** To a lesser extent, the Chao. They can absorb the power and some physical traits of any tiny animal presented to them. They can mimic the physical traits of their owners, to some extent- the Sonic and Shadow chao being the prime offenders.
** Metal Sonic from the second ''VideoGame/SonicRivals'' game has no Signature Move of his own - instead, he copies it from the opponent he's currently facing. In case he's alone or [[MirrorMatch two Metal Sonics]] are fighting each other, it defaults to [[SuperSpeed Sonic Boom]].
* ''VideoGame/JadeEmpire'' seems to teach new fighting styles to the player character this way.
* ''VideoGame/KhimeraDestroyAllMonsterGirls'' is heavily based upon the ''Mega Man'' franchise, so it's no wonder that the protagonist, Chelshia the chimera, gains the defeated bosses' powers and abilities. Her [[MadScientist creator]] splices their DNA into hers to allow that.
* ''VideoGame/KnightsOfTheOldRepublic II'', does essentially the same thing. On the [[KarmaMeter dark side path]], the player character can learn complex lightsaber techniques and Force forms from Jedi Masters while fighting them. To be fair, the Jedi Masters do [[LampshadeHanging protest that this is impossible...]] [[spoiler:it turns out to be part of your character's unique abilities]]
* Revolver Ocelot from the ''Franchise/MetalGear'' series falls squarely into this trope. [[AllThereInTheManual According to the supplemental material]], after merely witnessing a tactic on the battlefield, he can them use said tactic thereafter. This certainly explains his ludicrous skills with revolvers, but he is noticeably clumsier as his younger self in ''VideoGame/MetalGearSolid3SnakeEater'', where Snake [[LampshadeHanging calls him out]] on using a tactic he's only just seen in battle.
** At the end of the game [[spoiler:he fights Snake hand-to-hand, and uses CQC moves ''seconds'' after Snake uses them on him]].
** All main ''Metal Gear'' games, starting from ''Metal Gear Solid 3'', feature this trope to some extent. Stamina killing a boss in [=MGS3=] gives you a camo pattern that provides a certain bonus (for example, The Fear's pattern increases Snake's camo index at the cost of a stamina drain, while the Fury's halves all fire and explosive damage.) In ''VideoGame/MetalGearSolid4GunsOfThePatriots'', beating a member of the Beauty and the Beast unit gives Snake a new weapon (in Laughing Octopus' case, FaceCamo) while in Peace Walker, beating an AI weapon several times unlocks a weapon to be placed on Metal Gear ZEKE (the Chrysalis' railgun is required, though.) Lastly, in ''Rising'', beating a member of the Winds of Destruction unlocks a copy of their weapon for purchase. Completing the game will also give access to Samuel Rodrigues' HF Blade.
* In the ''VideoGame/LegacyOfKain'' series, Raziel and Kain steal their enemies' abilities by devouring their souls/blood in ''Soul Reaver'' and ''Blood Omen 2'', respectively. One review of ''Soul Reaver'' actually referred to Raziel as "a sort of demonic Mega Man" for this reason. Interestingly, Raziel actually keeps almost all of the abilities he gains this way in his first appearance through his next two.
* Shirou of ''VisualNovel/FateStayNight'' is a rather IneptMage in most aspects, but he eventually discovers that [[spoiler:he excels in a special brand of Projection magic, able to reconstruct any sword-type weapon he sees as well as the original's owner's skill in using it]]. In the final route of the game, [[spoiler:True Assassin]] seems to exhibit a form of this, as well, gaining form and intelligence by eating the hearts/bodies of his opponents.
* In the {{cyberpunk}} FPS game ''VideoGame/CyberMage'' by Origin, one of the ways the titular character can gain new Darklight spells is by allowing them to hit him, so that the crystal implanted in his forehead can replicate the spell. You can do this either by letting enemies cast the spell on you, or by finding Icons that cast the spell and shooting one into a nearby wall.
* The ''only way'' to learn new attacks in ''VideoGame/DigimonWorld'' for the PSX is to get hit by an attack your current Digimon can use. Additionally, you can also train their Brain stat with the Classroom, but that takes much longer and is less likely to happen.
* Masaru in ''VideoGame/LiveALive'' is a professional fighter who is determined to become the best in the world. He learns new techniques from his enemies by having them done to him.
* ''VideoGame/TheKingOfFighters'''s Rugal Bernstein was apparently originally supposed to be able to do this, taking your attacks and turning them back upon you, but due to memory constraints, he was given Geese's Reppuu Ken and Krauser's Kaiser Wave, with the explanation that he had fought those men before. He also has his own version of Athena's Psycho Reflector, called Dark Barrier.
* ''VideoGame/KingdomHeartsII'' has that and the Drive Forms. Each form's fighting style is a reflection of the person from whom the form is derived:
** Valor Form: Reflects Goofy's all-physical, up-close-and-personal fighting style
** Wisdom Form: Reflects Donald's all-magic, distance-oriented fighting style
** Master Form: Reflects Mickey's fighting style, using physical, magical, up-close, and distance attacks
** Final Form: Reflects [[spoiler:Roxas's]] fighting style, using lightning-fast attacks and both Keyblade and [[spoiler:Nobody-style]] attacks
** The [[NoExportForYou Final Mix-exclusive]] Limit Form reflects how Sora fought in the [[VideoGame/KingdomHeartsI first game]], using some of the special moves that were usable in ''Kingdom Hearts'', but not the original sequel.
* ''VideoGame/KingdomHeartsBirthBySleep'' has D-Links, which gives you a new command deck, finishers and passive abilities based on friends you meet during the game. Some, such as the ones based on Terra, Aqua, Ven, Mickey, Donald, Goofy and Zack were fairly reflective of their fighting styles, while ones based on Cinderella and Snow White, for example, were mostly thematic.
* ''VideoGame/CliveBarkersJericho'' sees [[spoiler:The Firstborn]] use this when you fight it. [[spoiler:It attacks by launching bolts of lightning at members of the team. When it lands a hit, it temporarily absorbs the powers of the victim, and the only way to damage it is to possess that team member and use their powers against The Firstborn.]] Makes for some awesome animations; most notably the aerial duel between [[spoiler:The Firstborn's version of Ababinili and Delgado's]] and the beatdown handed to it by Church.
* ''VideoGame/DevilMayCry 2'' employs a variation of this. The penultimate boss, Argosax the Chaos, is a [[MonsterMash twisted amalgamation of bosses from all through this and the last game]]; those bosses being Phantom, Griffon, Furiataurus, Nefasturris, Jokatgulm and Oranguerra. Each has its own health bar and the player must kill them all, one at a time, before going on to face the Despair Embodied.
** ''[=DMC3=]'' employs a different variation, where defeated bosses have their souls turned into Devil Arms for Dante's use (Cerberus becomes a three-handled ice nunchaku, Nevan becomes a [[ShockAndAwe literally-electric]] guitar, etc.). He also gains the Quicksilver style to slow time down after being on the receiving end of time-stops from Geryon.
* ''VideoGame/SagaFrontier'' has a single instance of this in Alkaiser's story. In the fight against the ''AffablyEvil'' robot version of himself, upon using the move Dark Phoenix, Alkaiser can use his own special move in response to seeing his in order to learn his ultimate ability, Re-Al-Phoenix.
** Also Monsters, and Riki in particular, are based entirely around absorbing enemies and mix-and-matching their moves.
** Mystics can seal monsters into their "mystic" weapons to learn moves as well gain a stat bonus.
* The ''Franchise/BreathOfFire'' series. In many of the titles, you can copy specific enemy abilities by simply witnessing them (in ''[[VideoGame/BreathOfFireIII III]]'' it was a Examine command, and in ''[[VideoGame/BreathOfFireIV IV]]'' you merely had to be Defending.).
* If Anastasia Romanov (yes, [[EverythingsBetterWithPrincesses that Anastasia Romanov]]) of ''VideoGame/ShadowHeartsCovenant'' takes a photo of certain enemies, she can "cast" a spell of theirs by [[SummonMagic "summoning" them with a photo]].
* Marisa Kirisame of ''VideoGame/{{Touhou}}'' has a variation on this, where she actually [[KleptomaniacHero steals the spells or spellbooks of others]]. She has only a small few spells that are actually of her own design (and she rarely even uses them), even her own signature move was stolen from Yuuka (although, since the [[KamehameHadoken Master Spark]] seems to be an innate ability, it seems to be a more 'pure' example of this trope than spellbook-based [[BeamSpam Non-Directional Laser]]). Since spellbooks are specifically stated in canon to be illegible to anyone who is not at least as great a mage as the one who wrote the spellbook when they wrote it, the fact that the [[CharlesAtlasSuperpower "mere" human Marisa]] can swipe powers from [[WitchSpecies Patchouli]], and even [[WorldsStrongestWoman Yuuka]], implies she has at least in some way earned her powers.
** It is worth noting that Marisa's versions of the spells she copies are often weaker than the originals in some way. Her Master Spark is smaller than Yuuka's, her Non-Directional Laser requires more power to cast, and her Orreries Sun cannot be thrown. She makes up for this by developing new spells which use the copied one as a base, often turning them UpToEleven (Final Spark/Final Master Spark/Blazing Star, Starlight Typhoon and Orreries Solar System respectively).
** Humorously, in the Windows era Marisa is something of a CompositeCharacter of her prior incarnation and various other PC-98 characters. She has copied her ''appearance and personality''.
** One of the official supplementals, "Grimoire of Marisa", uses this as its framing device. Marisa compiles a list of other people's spell cards, and ranks them according to how useful it would be to copy them (rejecting many based on her inability to copy the RequiredSecondaryPowers, her doubts on her ability to [[HowDoIShotWeb control them]], or... well... because they're [[WhatKindOfLamePowerIsHeartAnyway not worth the trouble to steal]]).
** Also from ''Touhou'', Satori Komeiji of ''Subterranean Animism'' is able to copy your partner's spellcards with her mind-reading powers, making her stage a NostalgiaLevel.
** And in the gaiden game ''Impossible Spell Card'', Seija Kijin exemplifies her nature as a CommanderContrarian by, during the first time she's a playable character, adamantly refusing to use [[InterfaceScrew her own actual powers]] in favor of using cheat items that allow her to replicate the gimmicks of numerous other characters.
* ''Franchise/ShinMegamiTensei''
** ''VideoGame/DevilSurvivor'' has a system in which your characters can "crack" the skills of demons or other demon tamers, gaining the skill to equip for later or immediate use. ''VideoGame/DevilSurvivor2'' increases the odds of getting a skill cracked with Joint Cracks.
** ''VideoGame/ShinMegamiTenseiIV'' has Demon Whispers. Once a demon has reached a level where it has unlocked all the moves it's gonna learn naturally, they initiate the event, in which they offer to teach you any of their abilities, barring some special moves and passives.
* ''VideoGame/TheMaw'' features the title character as an ExtremeOmnivore. When it eats certain unique enemies, it can also gain their powers, such as fire, flight, or shooting laser beams from its multiple eyes.
* Marivel of ''VideoGame/WildArms2'' and Emma of the ''VideoGame/WildArms1'' remake build up their skill set by stealing/downloading the abilities of the monsters they meet.
* As a ''Franchise/MegaMan'' homage, ''VideoGame/{{Rosenkreuzstilette}}'' has Spiritia plays it straight, Grolla averts it, and Freudia uses an odd variation by retooling the attacks to fit her [[AnIcePerson Ice Person]] status.
* One of the most popular skill builds of ''VideoGame/RagnarokOnline'''s rogues (and stalkers) involves using their Intimidate ability to copy the most recent skill they've been hit with, from player or monster alike. Only stalkers have an ability to preserve the copied skill, however.
* The ''VideoGame/{{Izuna}}'' games have a rare talisman that allows you to capture any enemy within it, as long as it's at a lower leven than the talisman. You can then read the talisman to summon them to your side, rip it to unleash an attack depending on the monster caught, or stick it to a weapon to add various effects to your physical attacks.
* ''VideoGame/GuildWars'' has the mesmer profession which has access to a selection of "steal" skills, which enable them to use a random skill from the enemy's bar for 20 seconds.
* Defeating anyone in ''VideoGame/BloodStorm'' would give the player a designated move.
* Spellsteal in ''VideoGame/WorldOfWarcraft'' pretty much works like this, although only for abilities that create a magic effect aka buff on the caster, which the spell transfers to the mage as the name implies.
** A more straight example with the Death Knight "Dark Simulacrum" ability, which, when cast on a target, allows the death knight to instantly cast the next of the target's spells that uses mana without losing any effectiveness (For one cast, at least).
** In ''VideoGame/WarCraftIII'', the same spell could also be used to steal summoned creatures from the enemy.
** The sneak preview at the upcoming expansion's talents gives us the Druid's Symbiosis ability which will copy one spell from the targeted player. That player will receive a druid spell.
* ''VideoGame/CommandAndConquerRedAlert3'' features the Hammer Tank, which steals the weapons from the vehicles it destroys.
* Each time you defeat one of the five evil pigs in ''VideoGame/{{Tomba}} 2'', you get a special robe that will let you use the elemental magic of the evil pig that you beat.
* A darker version in ''VideoGame/{{Myth}}''. As part of the ViciousCycle, the Leveler, a dark god that destroys the world every thousand years, {{reincarnat|ion}}es the last hero who defeated him and turns them into the next Leveler.
* ''VideoGame/ViewtifulJoe'' has Joker, a recurring KingMook MiniBoss. In your first encounter with him, his combat skills are limited to the standard Bianky punches and kicks, but in subsequent encounters, he adds additional abilities used by other Mooks to his repertoire until your last encounter with him where he has [[FinalExamBoss learned most of them]].
* In the {{roguelike}} ''Brogue'', your MonsterAllies can study (or consume) the corpses of monsters to gain their abilities: things like teleportation, being immune to fire, or flying. Yes, you can have permanently flying Tentacle Horrors following you around.
* In ''VideoGame/TheElderScrollsVSkyrim'', the player, as the Dragonborn, has the power to absorb the souls of slain dragons, which can be used to unlock [[WordPower shouts]], [[OurDragonsAreDifferent the incantations that give dragons their powers]].
* In [[DefenseOfTheAncients DotA]] and [[VideoGame/{{Dota2}} DotA 2]] there's Rubick, a playable hero with the title of Grand Magus, who can use his ultimate ability, Spell Steal, to copy almost any previously cast active ability from a nearby enemy hero for 3-5 minutes into his own set of abilities.
* The BigBad [[spoiler:Downy Reed]] in ''VideoGame/DuelSaviorDestiny'' has the ability to absorb the powers and abilities of others, either through simply copying what they do or flat out absorbing them and killing them in the process.
* You Grabber in ''VideoGame/GridWarrior'' does this, but can only be [[FinishingMove used on weakened foes]]. Depending on the enemy's strength, you'll get up to three upgrade levels per weapon. The final upgrade can only be obtained by finishing off a weakened Boss with the Grabber.
* In ''VideoGame/StarCraft'', the Primal Zerg absorbed genetic material or "essence" from the creatures they ate. A number of missions in ''VideoGame/StarcraftIIHeartOfTheSwarm'' involve incorporating new abilities into Zerg strains by killing and consuming animals.
* Grimoire Stones in ''VideoGame/EtrianOdyssey Untold: The Millenium Girl'' can contain enemies' skills along with regular class skills.
* ''VideoGame/BravelyDefault''
** This is how you gain new jobs. By defeating a boss who wields a job asterisk, you gain that asterisk, and the ability to change to that job, for yourself.
** Power Copying is one of the abilities of the Vampire class. When they are targeted by certain monster abilities, they have a chance of learning them.
*** Returns in ''VideoGame/BravelySecond'' with the Catmancer class, but with slight differences.
* In ''VideoGame/CopyKitty'', this is protagonist Boki's ability. She also can combine up to three powers together into a hybrid ability. [[WhatKindOfLamePowerIsHeartAnyway She hates her power since she can do very little on her own, and has to have someone else around to copy off of.]] Her teacher is more of the opinion that HeartIsAnAwesomePower and Boki is not considering the scope and versatility of this ability.
* In ''VideoGame/DustAnElysianTail'', your projectile-casting sidekick Fidget somehow learns how to shoot fireballs and lightning, respectively, after defeating the first two bosses. Combining them with your character's Dust Storm ability replicates the bosses' special attacks and makes you a true force to be reckoned with.
* ''Videogame/ShovelKnight'' contains a downplayed example, as most of the relics you can find within stages give you a weapon that emulated a part of the boss's attack pattern or an attack based on one of that stage's themed enemies.
* Three of the minibosses in ''VideoGame/TheBindingOfIsaac'' have a chance of dropping items that give you abilities similar to theirs. Pride, whose main attack is spamming armed bombs randomly around the room, may drop the Anarchist Cookbook, an item that does the exact same when activated. Lust, who chases Isaac around and does contact damage, may drop The Virus, which allows Isaac to apply a poison effect to anyone who gets too close. Wrath, who slides armed bombs toward Isaac, may leave behind ordinary bombs or Mr. Boom, a more powerful bomb that replenishes every two rooms.
* In ''VideoGame/TheLegendOfDarkWitch'', Zizou gains bosses' powers upon their defeat, and can enhance them with Tres crystals to make them even stronger.
* Xane from ''VideoGame/FireEmblemAkaneia'' can morph into any of your army member that is not a Manakete, thus gaining his/her stats as well as movement and weapon types. He is very weak and cannot attack when untransformed, however.
* The ''VideoGame/EarthBound'' [[GameMod ROM Hack]] ''VideoGame/{{Unearthed}}'' is notable in that it adds a Blue Magic system not present in the original. Isaac, a [[BuffySpeak small helicopter robot thing]] can [[PowersAsPrograms and sometimes "download" certain abilities used on the party]], and gain the appropriate PSI equivalent for it. For example, "generate a burst of steam" is the equivalent to PSI Fire Alpha for him.
* This is Arfoire's signature ability in the ''Franchise/{{Neptunia}}'' series. She can copy, tweak, and combine any power that's used on her, or that she manages to steal from the original wielder. This includes [[PhysicalGod CPUs']] [[SuperMode Hard Drive Divinity]].
* In ''VideoGame/MassEffect2'', earning the loyalty of your squadmates lets Shepard expend element zero to learn their special powers.
* In ''VideoGame/EarthBound'', Poo has a unique command, Mirror, that allows him to become a copy of an enemy until either his hit point counter rolls to 0 or the battle ends. This includes several powerful foes that are ordinarily GoddamnedBats (such as the endgame Nuclear Reactor Robots), which are often just as effective when Poo is using their powers for you instead of against you.
* ''VideoGame/ThreadsOfFate'' takes this to a logical extreme. Rue can copy ''any'' non-boss enemy he defeats, allowing him to turn into them and use their abilities. This is used as a plot point a few times. Mint, on the other hand, can gain the magic powers of strong enemies she defeats.
* ''VideoGame/DistortedTravesty 3'': After the protagonists [[BagOfSpilling lose all the abilities they originally had]], they begin gaining new ones by copying powersets from other gaming heroes. Both get [[Franchise/SuperMarioBros Mario's and Luigi's]] jumping power, Jerry gets [[VideoGame/TheLegendOfZelda Link's]] and (ironically enough) [[VideoGame/MegaManX Mega Man X's]] abilities, while Claire gets [[VideoGame/CastlevaniaI Belmont's]] and [[VideoGame/{{Metroid}} Samus's]] powersets. [[spoiler:Originally, they thought the video game characters were just merging with them until the crisis had passed... but it turns out that those characters gave up their lives and souls to pass on those abilities, and are never coming back.]]

[[folder:Web Animation]]
* The magical Crystal of Absorb from ''WebAnimation/UnforgottenRealms'' gives one the power to take on the powers of a dead opponent. Rob instantly equates this to being "like Mega Man".
* In ''WebAnimation/{{RWBY}}'', [[spoiler:Velvet Scarlatina]] has an ability that is a combination of this and DittoFighter. She can take pictures of other characters' weapons with [[spoiler:her camera]], then perfectly mimic their fighting styles, complete with HardLight copies of their weapons that are nearly as effective as the real thing. Needless to say, the scene where she first displays this power was [[CrowningMomentOfAwesome rather badass]].

* Red Mage of ''Webcomic/EightBitTheater'' can copy the last action he's seen, though only once. This is because his class was changed to Mime -- a real class from the ''Franchise/FinalFantasy'' series -- but the author uses it for occasional references to [[http://nuklearpower.com/daily.php?date=060114 Marvel's Taskmaster]] as well.
** Also on 8-Bit Theater, Black Mage has the blue magic ability to learn attacks from others. Naturally, since he's the official ButtMonkey, he has the most inconvenient form of blue magic - he needs to get hit with an attack to learn it. One of the only three that he's learned actually ''keeps him as the target'' when he uses it.
--> '''Black Mage''': When Sarda casts a spell to hurt you and you learn that spell, you learn to ''cast a spell that hurts you.''
*** That happens twice, actually. Sarda's simple "rewrite reality according to my will" spell rewrites reality according to ''Sarda's'' will.
* ''Chocolate Milkmaid'' can absorb the powers of anyone she "takes in a part of". Bodily fluids count. All of them. But it only works when she's in Milkmaid mode.
* Max from ''Webcomic/{{Asperchu}}'' can copy an enemy's abilities by swallowing them, due to being an {{Expy}} of Kirby.
* The BigBad of ''AkumaTH'' is The Undertaker, a demon with the ability to copy and absorb a person's soul, gaining that person's strength, techniques, and knowledge. [[spoiler: He can copy inanimate objects, too, as long as they have energy.]] Gemel from TonyTH learns any move that he personally sees. [[http://www.mgcomics.com/AkumaTh/Misc/GhostPast_27.gif When the two meet during a crossover]], [[DiscussedTrope The Undertaker briefly discusses the different methods that can be used to perform this trope]]. [[spoiler: 'Taker then proposes that they copy each others' ability to copy, allowing them both to copy a person's entire moveset just by looking at them.]]
* ''Webcomic/BobAndGeorge'' only lets Mega Man copy powers during the parodies of the games themselves. Given the nature of the series, what he can actually do with the powers is often extreme.
* Kirby does this a lot in ''Webcomic/BrawlInTheFamily''. In [[http://brawlinthefamily.keenspot.com/2013/01/29/459-kirby-transforms/ this comic]], he ends up doing ''multiple layers'' of power copying.
* ''Webcomic/{{Sidekicks}}'': One of the functions of the [[PlotDevice Second Prana]].
* [[TeenGenius Baam]] in ''Webcomic/TowerOfGod'' is so talented in Shinsoo usage that he easily can copy and apply both shinsoo and physical techniques once he experiences them. In some cases he can improve the techniques with ease, though sometimes, special skills require a lot of improvement to even reach the original user's level, as [[PintsizedPowerhouse Love]] notices.
* All wizards in ''Webcomic/ElGoonishShive'', can permanently learn another person's spell [[http://www.egscomics.com/index.php?id=1947 just by observing it in action enough times]]. Since learned spells appear in their owner's spellbook as additional pages and are described in detail, wizards who keep up with their spellbooks can potentially use such spells at least as effectively as the original owners can if not more.
* ''Proxy'' from the EGO story arc of ''WebComic/HeroesUnite'' has the ability to take on another character's powers and appearance. (Nebulon appears twice on the cover art for this reason). Similarly, the foe who originally prompted the formation of Heroes Unite was an alien warrior called ''Deuce'' who had the ability to copy powers (as well as SuperStrength and SuperToughness). In the end they only beat him because [[spoiler: he was limited to absorbing two sets of powers at once and they tricked him into using up both slots to copy Acrobat - a BadassNormal with no powers whatsoever]].
* ''Webcomic/{{GrrlPower}}'': The character For Whom the Death Tolls has an interesting variation. He doesn't copy a person's power, but when he is attacked he automatically gains the power/ability that will nullify the attackers power/ability. Only one at a time though....

* Chaka, at the SuperHeroSchool Whateley Academy in the Literature/WhateleyUniverse, has the ability to manipulate Ki and see it flow. When attacked by a ninja using a secret "paralyzing nerve strike", she watches him as he tries it on her. She blocks it, so he never finished the move. She promptly uses it on him before he can react, having learned it in less time than it takes to execute the complete move ''once''.
** The second time she meets that ninja, she witnesses him finish off another student beforehand with a KameHameHadoken. When she fights him shortly after, she takes him out in a QuickDraw battle, using the blast back against him. She names it the "[[{{Pun}} Chaka Chaka Bang Bang]]". Chaka stealing Daikon's moves seems like it's one instance away from being a RunningGag.
** Also, 'mimic' abilities are one possible subcategory of mutant powers in that setting, though the copy isn't usually quite as good as the original. For example, Sahar has the ability to 'collect' other people's specific psychic knacks, and Counterpoint is a school bully who deliberately tries to goad other students into fighting him so he can copy their powers and beat them up even worse next time.
** Possibly the new canonical example of the Mimic trait is Mimeo, who can copy the powers of multiple mutants at once at full strength simply by fighting them for a while and as an experienced career supervillain also generally has the skill to use the powers effectively once he has them (it helps that he's studied at Whateley himself back in the day when the school was still new). His one limit in this regard is that he can only ''hold'' the copied powers for up to four hours -- consequently, his usual modus operandi appears to be to show up when he needs cash, tussle with a team of superheroes for a while, and then go off to hit a bank or otherwise commit his ''real'' crime while the "charge" lasts. And now he's fought Team Kimba and discovered what those kids can do...
* Jasmine, from ''Literature/TrintonChronicles'', has the ability to copy all the other superpowers she is with-in range of. This being said her power is kind of useless against others with the same or similar ability. Jasmine has copied so many powers at once she seems to have no limit, she also tends to use them like 'toys' in some cases including copying the power of a transmuter to transform junk into gemstones and the power of mentally interfacing with technologies in order to turn on her apartment's electronics and dial the phone without ever touching it.
** Taltos does this also only using his own power of [[ElementalRockPaperScissors Nemesis]] against several of the heroes in [[HalloweenEpisode Hallow's Eve]].
* In the crossover of WebAnimation/SmashBrosLawl, WebVideo/TheIrateGamer has this as a signature move, but with the twist that the powers he copies are very underpowered versions of the originals.
* In ''Literature/{{Worm}}'', several characters can use the abilities of other [[DifferentlyPoweredIndividual parahumans]]:
** Glaistig Uaine, who absorbs dead parahumans, and can manifest up to three of their ghosts, powers included.
** [[spoiler:Grue after his second trigger event]], who can borrow the powers of anyone he catches in [[spoiler:[[CastingAShadow his darkness]]]].
** [[spoiler: Tohu, Endbringer number six, can take the powers of any three capes, including ones that ''aren't currently on the battlefield - or even alive.'' Given the number of synergizing powers in Worm, this is, as normal for the Endbringers, a StoryBreakerPower.]]
** Victor can steal proficiency from others by proximity, although this only works for mundane abilities. However, he retains these skills, while the victim of the skill drain can only recover part of the lost proficiency with time.
** Every time the Butcher is killed, its powers and consciousness transfer over to its killer. We first encounter it in its 15th iteration, containing the powers and minds of 15 different parahumans.

[[folder:Western Animation]]
* ''WesternAnimation/{{Ben 10}}'' later gained the ability to turn into any alien the Omnitrix got a DNA sample from in the third season, allowing him to transform himself into slightly-altered versions of a small handful of that season's AliensAndMonsters. To date, each of these three forms has been used exactly ''once'', and the plot point seems to have been dropped, although it was picked up again in [[WesternAnimation/Ben10UltimateAlien Ultimate Alien]].
** Ben's nemesis Kevin 11 started out with a similar ability, which he used to copy Ben's powers. After getting Ben's powers, his original ability was never seen again (except in an "alternate future" episode where he had used his ability absorption to steal traits of thousands of aliens, basically becoming a cross between [[Manga/InuYasha Naraku]] and [[Series/{{Heroes}} Sylar]]).
*** Later seasons have Kevin as a sidekick, having found a way to return to human form. His power is the absorption ability he originally possessed, although he only uses it to absorb matter instead of copying powers. It's explained in a much later season that his power copying is a DangerousForbiddenTechnique that turns members of his species evil and insane, which is why he was a sociopathic villain in the original series.
* The BigBad of ''[[WesternAnimation/MenInBlack MIB: The Series]]'' was Alpha, the human founder of MIB, who merged with an alien artifact that allowed him to absorb the body-parts of aliens into his own, allowing him to cheat death and also resulting in him turning into a rather grotesque patchwork lifeform (with the abilities and attributes of all his alien body parts).
* Blackarachnia from ''WesternAnimation/TransformersAnimated'' can drain powers with a touch, similar to Rogue (except she can turn it off). [[spoiler:Back when she was Elita-1, she could copy without draining.]] Lockdown, similar to Alpha, steals body parts from other Transformers, and is essentially a Frankenstein's monster-like assembly of parts.
* The already [[TheJuggernaut unstoppable]], [[ImplacableMan unyielding]] [[PlanetEater Beast Planet]] in ''WesternAnimation/ShadowRaiders'' is implied to be able to do this when it [[spoiler: creates a duplicate of a planet it previously ate... and at the very end, when it may have copied the Prison Planet's teleportation technology...]]
* Twilight Sparkle of ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' is capable of this. While most unicorns are capable of a little magic that helps them in their special talent, Twilight's talent IS magic so this allows her to easily copy spells used by other unicorns. She only need be exposed to it a couple times at most in order to pull off a fairly accurate facsimile.
* The Shushu Anathar from ''WesternAnimation/{{Wakfu}}'' can copy the magic of anyone he touches. He can even those use their magic ''better'' than they can. When he copied Yugo's power he could create dozens of portals at once while Yugo is only able to create one pair of portals at a time.
* ''WesternAnimation/MegaMan'' again.
** Mega Man's methods in the show differed from the games: Defeating a Robot Master wasn't needed as Mega Man only need to grab the Robot Master to absorb the power. His armor's colors also stay the same familiar blue, and the Robot Master's weaknesses to the weapons are never brought up. He could seemingly only keep the power for a few minutes/shots, but he stole a Robot Master's power at least OncePerEpisode, usually with stock footage.
** As evidenced by Mega Man's most (in)famous utterage of the page quote, [[http://www.youtube.com/watch?v=C7dSJN5LgsE this didn't alway work out for him]].
** Mega Man's powerful time-traveling ally, VideoGame/MegaManX, gets in on the act and takes this up to eleven during his only appearance in the cartoon. X shows that not only can he copy enemy weaponry from Mega Man's time (Snake Man's Search Snake, to be precise), but like in the Mega Man X video games, X can super-charge them. He powers-up the Search Snake and sends it to speedily devour Wily's gigantic super laser.
* Dante Vale in ''WesternAnimation/HuntikSecretsAndSeekers'' gains this ability with the [=CopyKind=] ability, which let him borrow the abilities of [[{{Mon}} Titans]]. This comes in handy [[spoiler: to bring him BackFromTheDead at the end.]]
* The version of [=AMAZO=] from ''WesternAnimation/JusticeLeague'' is a master of this. By the end, he's got [[WingedHumanoid wings]] and a [[DropTheHammer mace]], reflecting bracers, a GreenLanternRing, SuperSpeed and EyeBeams. The only way to stop him was to ''give'' him another power: {{telepathy}}, so that he could learn that he was being manipulated by a bad guy. [[VictoryIsBoring He eventually got bored with his "opponents"]], and decided [[BlackAndWhiteMorality their conflicts]] were now beneath him (as the android doesn't just copy powers, ''[[AdaptiveAbility it evolves]]''), and headed off into space in search of meaning. When it returned, Amazo was basically a [[PhysicalGod God]]. [[spoiler: Lex Luthor later wanted to make himself an android body to gain Godhood using the same blueprints as Amazo.]]
* On ''WesternAnimation/TheSimpsons'', Comic Book Guy invents a superhero named Everyman, who is able to get the superpowers of any superhero just by touching a comic book. "His superpower is ''every'' superpower!"

[[folder:Real Life]]
* The nudibranch, a type of mollusk sometimes called the "sea slug," feeds on jellyfish and other stinging sea creatures. It is capable of taking the "stinging" cells from the creatures it eats and incorporating them into its ''own'' body, sometimes becoming more deadly than the animals it preys on.
* Photuris fireflies first learn and mimic the blinking pattern of a different genus' females, then devour the attracted males. They can then absorb the devoured male's defensive toxins and use them for themselves.
* It was believed by some cannibalistic tribes that eating a dead person's brain allowed you to learn their life's experiences. This unfortunately meant you could also gain the exact same disease they probably died from.
** The most common version of this was when warriors would eat the brains or hearts of vanquished enemies to gain their strength or energy.
** Eating brain matter was the main way the disease ''kuru'' spread between people. It's thought to be extinct now. Just as well since it's deadly and dying from it is messy at best.
* The Belgian beer industry is home to several strange and exotic beers but is fully capable of mass-producing less bizarre styles that originated abroad, like porters, stouts, etc.
** Strange and exotic to non-Belgians, perhaps, but not to them.
* The concept of sympathetic magic can work like this: the Bimana of Africa decorate their hunting shirts with mouse skins for speed, animal claws and teeth for ferocity, and so on.
* Rabies. A deadly example but the trope still works. Rabies does not just spread via bites but also from eating something with rabies. Without treatment, this can be fatal but before death hits, "Rabid" strength, speed, ferocity and foaming at the mouth can be enjoyed.
* Bruce Lee's Jeet Kune Do works on the idea of "absorbing what is useful". Lee's personal style combined his best moves from Wing Chun, Tae Kwon Do, western boxing, fencing, and escrima. Anyone adhering to this concept of martial philosophy can build their own style by learning from different ones.
* Many drugs are like this as certain (sometimes unnatural) chemicals in them mimics neurotransmitters. This can be beneficial if it gives your brain something it is lacking. It can be harmful if it causes you to get addicted and makes the real neurotransmitters less effective. It can be worse if you get too much of something, because then you body and mind freaks out and you can die from an over dose.
* The mimic octopus doesn't gain "powers" per-say, but it can use it's transforming ability to scare off or discourage certain predators and it can change color to camouflage it self.
* Viruses, though they aren't ''technically'' living (sort of, the other wiki uses this quote: "organisms at the edge of life"), invades a cell. If two viruses of the same strain attacks a cell, their DNA or RNA can break apart and recombine into a new shape. Also, if different strains of a virus have an "offspring", they can become more deadly AND spread across species. The 2009 flu pandemic, i.e., had a mix of swine, avian, and human influenza genetic sequences.
* There a few animals that evolved to look like more dangerous animals, i.e., a non-venomous that looks similar to venomous one. They are other species that are more rare in that they mimic a more dangerous species behavior. There's at least one snake that mimics cobras despite the fact that its species has never seen cobras and there are no fossil records of its species meeting a snake that acts like a cobra (cobras' behavior really is one-of-a-kind, well, the only species that can back it up anyways...)
* A version of this is employed in many sports and games with a competitive scene (especially where there are regular tournaments with cash prizes): the winners' strategy is analyzed and copied. Those who wish to remain winners must continually create new strategies, or perform their strategies better than anyone else can.
** In theory this is one of the advantages of capitalism. One company finds a better way to serve its industry and gains a temporary advantage, then eventually others either copy what works or go out of business (their workers going to work for the surviving companies). In practice this works more often in the long run than the short term, and winning companies can try to prevent competitors from arising or surviving so they do not have to improve.