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Known in Japan as ''Gōketsuji Ichizoku'' ("Gōketsuji Clan"), ''Power Instinct'' is a FightingGame series by Creator/{{Atlus}}.

The games in this series are the following
* ''Power Instinct'' / ''Gōketsuji Ichizoku'' (1993; Arcade/Genesis/SNES)
* ''Power Instinct 2'' / ''Gōketsuji Ichizoku 2'' (1994; Arcade/[=PlayStation=])
* ''Gogetsuji Legends''[[note]]sometimes called ''Power Instinct Legends''[[/note]] / ''Gōketsuji Gaiden: Saikyou Densetsu'' (1995; Arcade)
* ''Groove on Fight'' / ''Gōketsuji Ichizoku 3: Groove on Fight'' (1997; Arcade/Saturn)
* ''Matrimelee'' / ''Shin Gōketsuji Ichizoku: Toukon Matrimelee'' (2002; Neo-Geo; released two years later for PlayStation2 as ''Shin Gōketsuji Ichizoku: Bonnō Kaihō'')
* ''Gōketsuji Ichizoku Matsuri Senzo Kuyou'' (2009; Arcade)

The series also produced one SpinOff, ''Prikura Daisakusen'', an isometric ActionGame released for arcade and SegaSaturn in 1996.
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!!This series features examples of:

* AffectionateParody: of most other fighting games at the time.
* BigBad: Each game in this series has its final boss:
** ''Power Instinct'': Oume Goketsuji
** ''Power Instinct 2'': Otane Goketsuji
** ''Gogetsuji Legends'': Chuck
** ''Groove On Fight'': Bristol-D [[note]]A demonic form of Bristol Weller[[/note]]
** ''Matrimelee'': Princess Sissy (or Bobby Ologun in the PS2 version)
** ''Matsuri Senzo Kuyou'': Shinjuro [[spoiler:Goketsuji]]
* BigScrewedUpFamily: Every playable character in the series and a number of the non-playables are members of the Goketsuji family. Some more distant than others, of course...
* {{Bishonen}}: Several, most interestingly Prince's alternate form.
* {{Crossover}}: The {{guest fighter}}s from ''VideoGame/RageOfTheDragons'' appeared in ''Matrimelee''. On the other hand, Kurara appeared in a ''VideoGame/VirtuaFighter''-esque PlayStation game, ''Heaven's Gate''.
* EnergyAbsorption: The Otane, Oume, Elizabeth, and Sandra do this in order to transform into their younger selves.
* [[{{Expy}} Expies]]:
** Bristol-D looks like [[Franchise/{{X-Men}} Mister Sinister]].
** Chuck is a bossy [[VideoGame/ArtOfFighting Ryo Sakazaki]]. He even predated [[VideoGame/StreetFighterIII Sean]].
** Remi Otogiri is a female version of [[VideoGame/StreetFighterII Guile]].
** Saizo Hattori is basically UsefulNotes/HattoriHanzo and Kirigakure Saizou combined.
*** Hizumi Yukinoue is an {{Otaku}}-friendly Saizo.
** Thin Nen is [[DragonBallZ Krillin]] all grown up.
** White Buffalo is much like [[VideoGame/StreetFighterII Thunder Hawk]], even [[VirtuaFighter Wolf Hawkfield]].
* [[WolverinePublicity Goketsuji Publicity]]: Otane and Oume themselves.
* {{Gonk}}: Prince.
* [[RedOniBlueOni Green Oni, Blue Oni]]: The Kuno brothers Shintaro and Buntaro.
* GuestFighter: [[RageOfTheDragons Jimmy, Lynn, Elias, and Mr. Jones]] in ''Matrimelee''.
** So did Bobby Strong in the Playstation 2 version of said game.
* {{Kid Appeal Character}}s: Kintaro Kokuin, Kurara Hananokōji, Popura Hananokōji [[note]]Kurara's [[StrongFamilyResemblance daughter]][[/note]], and Takumi Hattori
* LimitBreak: A few characters in ''Matrimelee'' and up had a level 3 Forbidden super move.
* [[spoiler:LohengrinAndMendelssohn: Whoever defeats Sissy in Matrimelee will proceed to marry her... NOT!]]
* [[SpellMyNameWithAnS Look what]] ''Matrimelee'' [[DubNameChange did to some of the characters' names]]:
** Annie Hamilton -> Anny
** Kurara Hanakōji -> Clara
** Kuroko [[labelnote:(non-player character)]]He's also playable in ''Gogetsuji Legends'' under the name Ninja Boy when it comes to that game's American version.[[/labelnote]] -> Enabler
** Otane Gōketsuji -> Tane
** Oume Gōketsuji -> Ume
** Thin Nen -> Chinnen
*** On a similar note, Oshima is spelled Osima in ''Power Instinct 2''.
* ManaMeter: Introduced in ''Power Instinct 2''. Getting hit or striking a blocking opponent builds this up. Groove On Fight introduced multiple levels of the meter, which shows up in later games.
* MeaningfulName: ''Groove On Fight'' utilizes background dance music.
** On the subject of acronyms, Max Ax Dax in ''Groove On Fight'' was better known as M.A.D.
* NamesTheSame:
** Otane Goketsuji has nothing to do with actress Tane [=McClure=], but she went by her new first name Tane in ''Matrimelee''. Her sister's first name is also the surname of [[Series/DenshiSentaiDenziman Denji Blue]].
** ''Groove On Fight'' has nothing to do with a boxing game, ''Glove On Fight''. However, both of these games have similar logos.
* OlderThanTheyLook: See EnergyAbsorption.
** Kanji can turn into his younger samurai self in one of his moves.
** Prince can also turn into his younger self when [[YouGetKnockedDownYouGetBackUpAgain he gets knocked down and gets back up again]].
* OnlyOneName: Chuck, Falco, M.A.D. (subverted; his name is Max Ax Dax), and Maruta[[note]]non-player character ''and'' literal training dummy[[/note]]
** There's a related [[http://www.youtube.com/watch?v=PumFnlu9EIY the unlockable music video for it]] for it: onmyoji Yabeno Hikomaro, shrine maiden Kotohime, and three backup monks (referred to only as the Bouzu Dancers) dance in the background to a surprisingly catchy tune. The song and video became something of a meme.
* RuleOfThree: Strangely enough, each character in ''Groove On Fight'' has a three-pieced special move.
* ShotoClone: Reiji and Keith. In ''Groove On Fight'', it's Larry and Chris. Annie also qualifies.
* SourceMusic: The background musicians are usually visible in each stage.
* SNKBoss: Bristol D. and Princess Sissy. '''Especially''' Sissy.
* TauntButton: ''Matrimelee'' introduced this. In case both players taunt at the same time, they must proceed to a "Bloodline Battle", where they'll press a correct button to respect each other until either fighter makes the wrong move.
* TomboyAndGirlyGirl: Angela (ButchLesbian) and Annie (LadyOfWar).
** In addition from ''Matrimelee'' onwards, Hikaru ({{Bokukko}}) and Sissy (GirlyBruiser).
* {{Transformation Trinket}}s: Shown in the ''Gogetsuji Legends'' intro are Clara's wand and Kinta's bib, which respectively turn them into Super Clara and Poochy.
* WidgetSeries
* XMeetsY: ''Groove On Fight'' is ''VideoGame/StreetFighterAlpha'' meets ''[[FuunSeries Kizuna Encounter]]'' with a touch of ''VideoGame/StreetFighterIII'' and ''[[FatalFury Mark of The Wolves]]''.
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