! All spoilers for ''Anime/MobileSuitGundamWing'' are unmarked. Administrivia/YouHaveBeenWarned!

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->''History is much like an [[TitleDrop endless waltz]]. The three beats of war, peace, and revolution continue on forever. However, history will change upon the day of my coronation.''
-->-- '''Mariemaia Khushrenada'''

At first a 3-part OVA released from January to June 1997 before receiving a full theatrical release in August 1998, ''Endless Waltz'' concluded the ''Anime/MobileSuitGundamWing'' storyline until the release of ''Frozen Teardrop'' 12 years later.

In the year After Colony 196, the "Eve Wars" (the conflict between Earth and the Colonies) have ended, and both Treize Khushrenada and OZ have passed from existence. The Earth Sphere Unified Nation (ESUN), and a special peacekeeping police force known as the Preventers, rose from the ashes of OZ. Since they figure they will no longer have a role in the post-war era, four of the five Gundam pilots (with Wufei as the lone holdout) put their Gundams on a giant disposal satellite headed for the sun. Peace reigns supreme on Earth and in space.

This peace would not last, though: on the anniversary of the Eve Wars' end, a rebellion occurs on newly-completed colony L3 X-18999. The rebellion, led by seven-year-old Mariemaia Khushrenada (who reveals herself to be Treize's daughter), kidnaps Relena Darlian (now the Vice Foreign Minister of the ESUN) during a diplomatic visit to the colony. As the Gundam pilots investigate further, they discover that Mariemaia's grandfather -- Dekim Barton, a former adviser to martyred colony leader Heero Yuy -- really controls the rebellion. Dekim plans to use X-18999 to go through with [[ColonyDrop the "original" Operation Meteor]] [[note]]crashing the colony into Earth and letting the Gundam pilots take control in the chaos[[/note]] if the ESUN doesn't comply with his demands.

The Gundam pilots must prevent Dekim from seizing power over the ESUN, but two things complicate matters: most of the pilots don't have their Gundams, and the only one that does -- Wufei -- ''[[FaceHeelTurn has defected to Dekim's side]]''.

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!!''Endless Waltz'' exclusively contains the following tropes:

* AdaptationExpansion: The novelization contains much more information than the OVA, incorporating elements from all side stories, including ''Episode Zero'', ''Blind Target'', and ''Battlefield of Pacifists''. Unfortunately, it was only in Japanese.
* AllYourPowersCombined: [[spoiler:The Tallgeese III takes the best features of all of Zechs's previous mobile suits and combines them into an extremely effective and lethal package. It has the chassis of the original Tallgeese, a mega cannon with enough firepower to rival Wing Zero's Buster Rifle, and a Heat Rod-equipped shield similar to that wielded by the Epyon.]]
* AnimeThemeSong: "Last Impression" (used in the movie) as well as "White Reflection" (used in the OVA), both by Two-Mix.
* AnimationBump: The animation quality is far and away much better than that of the series.
* AnAsskickingChristmas: The Battle of Brussels - most of the Gundam pilots plus Noin [[spoiler: and Zechs]] fighting off hundreds of Serpent Mobile Suits. Plus, Heero and Wufei duking it out in orbit. [[https://www.animenewsnetwork.com/feature/2020-12-23/beyond-diehard-why-gundam-wing-endless-waltz-is-the-preeminent-christmas-film/.167710 A 2020 Anime News Network article]] even suggest that ''Endless Waltz'' beats out ''Film/DieHard'' as the ultimate Christmas movie, since it has a sentimental element ''Die Hard'' lacks.
* ArmorPiercingQuestion:
** "How many more people must we kill? How many more times must I kill that girl and her dog?"
** After Heero fires his buster rifle at Mariemaia's supposedly secure shelter, she declares "What a miserable person! He-he's not gonna be able to achieve anything!" In response, Relena asks her "Are you afraid, Mariemaia?" She has no answer for that.
* TheAtoner: It is revealed that [[spoiler:Heero became this after accidentally killing a little girl he had befriended, to the point where he believed RedemptionEqualsDeath.]]
* BackFromTheDead: [[spoiler:Zechs.]]
* BadassBoast: During the finale, Trowa casually states that he and the other protagonist pilots shouldn't have much trouble dealing with the enemy mobile suits given that they're only outnumbered by about 50 to 1. [[spoiler:And if they hadn't been holding back to keep the enemy pilots alive, he'd have been ''right''.]]
* BaitAndSwitchGunshot: As Dekim was about to shoot Relena, Lady Une quickly draws her own pistol at Dekim. A gunshot is heard, and [[spoiler:Dekim falls over dead, shot by one of his own men.]]
* BroadStrokes:
** Infamously, this movie featured completely redesigned Gundams, [[{{Retcon}} even in flashbacks]]. There have been some manga and novels that attempted to explain the change, usually just settling for an upgrade that happened after the end of the series even if the flashbacks say otherwise. Though given the popularity of the new designs, some fans are okay with it being a simple Retcon.
** The redesigns are now canonical. To address this, Hajime Katoki also redesigned the 'first stage' Gundams featured in the show. The manga Glory of the Defeated is a basic retelling of the series with Katoki's designs substituting for Okawara's.
** Though a few additions in ''Glory of the Defeated'' have made things even more complicated: the TV version of Wing Zero appears in the manga as Wing Gundam Proto Zero, a prototype of Wing Zero created by Quatre based on the Gundam Scientists' blueprints. It was later heavily damaged and modified into the Endless Waltz version, and prior to the Eve Wars, it was completed, gaining a shield and the transforming ability of the TV version. A few elements of the TV version also made it into the EW Gundams, like the Deathscythe Hell's twin beam scythe and the Altron's tail cannon.
* ButtMonkey: Duo, in a rare ''Gundam'' moment that's '''actually''' PlayedForLaughs.
* CallBack: Remember those city ruins in the first opening of ''Gundam Wing''? [[spoiler:Heero destroyed it by accident.]]
* CallForward: Duo's conversation with Professor G in the flashback contains a few. Professor G disarms him and correctly deduces that Duo had intended to kill him and the rest of the staff, something which Duo does consider doing again when he freed them from White Fang in the series finale. After telling Duo to take the suit, Professor G further tells him to meet up with Howard, the sixth scientist who left the group; thus setting up their meeting in the series proper.
* ChristmasEpisode: The OVA starts on Christmas Eve.
* ClippedWingAngel: Most of the Gundams have lost a significant amount of their abilities and equipment, most notably Wing Zero's shield and thus [[TransformingMecha its ability to transform into a fighter jet]]. While this was originally due to the RetConned designs simply being more streamlined, ''Glory of the Losers'' gives them redesigned versions of all the weapons and abilities they had in the TV series and then some, only to lose them to catastrophic damage at the Battle of Libra or be left behind on the vessel that was supposed to dispose of them in the sun.
* ColonyDrop: It wouldn't be ''Franchise/{{Gundam}}'' without it! What the original Operation Meteor turned out to be; the Barton Foundation planned to drop all the colonies onto Earth, and then use the Gundams to take over the world in the resulting chaos. The Mariemaia Army sought to enact the original Operation Meteor by dropping Colony X-18999 onto Earth.
* ConfrontingYourImposter: Averted, the novelization explains that Trowa ''didn't'' use the name "Trowa Barton" when infiltrating the Mariemaia Army at all. Doubles as ContinuityNod, since the pseudonym he chose was "Ralph Kurt", a character from the side story manga "Blind Target".
** However, ''Glory of the Losers'' reveals that he did, and Dekim asks him why. He [[TalkingYourWayOut tells a lie]] that he did it in honor of Mariemaia's family, and that he'll gladly fight alongside them if they spare his life. Dekim smirks and says that they now have ''two'' former Gundam pilots on their side.
* DarkIsNotEvil: Compared to the Mariemaia Army, the Preventers in general don darker uniforms and outfits. But they're otherwise the good guys.
* DeadPersonImpersonation: As it turns out, [[spoiler:Trowa isn't really Trowa. The real Trowa Barton was a {{Jerkass}} perfectly willing to go through with the original Operation Meteor and his father Dekim's ambitions of ruling over what remained of humanity once the Earth was a smoking ruin, but took a bullet in the back from a more conscientious technician who had family on Earth; another technician, the amnesiac Triton Bloom, who called himself "Nanashi" (No Name) at the time, was able to convince Doktor S to let him take Trowa's name as well as the Gundam Heavyarms he was to use for the operation.]]
* DeathSeeker: The novelization makes it explicitly clear that Heero became this after he accidentally killed that little girl, which explains a lot of his EarlyInstallmentWeirdness from the original series, like jumping off a cliff without pulling his parachute cord, and trying to blow himself up the moment somebody sees him (according to the novel, he put the bomb in the suit himself, but Doctor J found it and disarmed it).
* DemotedToExtra: Hilde only appeared (alongside Duo) in the closing credits of the final OAV and the movie, presumably to show that she [[spoiler:survived the Eve Wars]].
* DeusExMachina: No explanation is given for how [[spoiler:Zechs survived a point-blank reactor explosion at the end of the series or where he got a new Tallgeese from]]. He just shows up in Lady Une's office and asks for a Preventer's callsign and authorization to deploy against X-18999 after having been presumed dead for a year.
* DeusExitMachina:
** Four of the five Gundams are en route to the sun, and Quatre (with the Maganac Corps) spends a good portion of the movie on a mission to retrieve them.
** Wing Zero and Nataku didn't join the rest of the Gundams in the final battle because after their duel in the atmosphere Wufei got some sense finally knocked into him and joins the rally that protests the invasion (even while on Nataku), and Wing Zero sank to the bottom of the ocean. Wing Zero would later resurface for one last stand.
* DoesThisRemindYouOfAnything:
** Relena gets drugged, falling asleep while several older men watch her, all with evil smiles on their faces. Anyone else getting bad vibes in that scene?
** [[spoiler: The original Trowa Barton]], a grown man, draping himself over Nanashi (a teenage boy), in order to show him a family photo. It's heavily implied that he's holding ''tightly'' onto Nanashi to keep him from running away. (In the orginal, Nanashi shows no outward discomfort, but in the ''Glory of the Losers'' manga, he's more visibly disturbed/upset/disgusted by this.)
* DoNotAdjustYourSet: Done twice; first by Mariemaia, and later, by Relena.
* DoubleReverseQuadrupleAgent: Trowa. See Reverse Mole.
* EmpathyDollShot: In Heero's flashback, after he destroyed an Alliance base, a teddy bear is shown being burned inside one of the buildings. It turns out that the teddy bear belong to [[spoiler:a little girl (and her dog) he met before his mission]].
* {{Expy}}: In addition to Mariemaia being one of Mineva Zabi, the Preventers are reminiscent of Londo Bell.
* ExtremelyShortTimeSpan: The entire film/OVA takes place over the course of about a week (For comparison, the original series takes place over the course of a year, beginning shortly before Relena's birthday and ending shortly before her next one). If it wasn't for the mention of how much time it would take for Quatre to chase down the satellite with the Gundams on it and bring it back, one might think the time span was even shorter.
* EvenMooksHaveLovedOnes: [[spoiler:You said that Trowa Barton is not Trowa Barton? Eh, [[WeHardlyKnewYe never]][[DeathByOriginStory mind]].]]
* FaceHeelTurn: Wufei declined to have his Gundam disposed of, and joined the Mariemaia Army, feeling that warriors like him are being cast aside in a changing world.
* FightingFingerprint: Duo recognizes he's fighting Trowa when he recognizes his tactic of [[MoreDakka excessively firing all of his weapons at him]].
* FreezeFrameBonus: Casual viewers can be forgiven for not noticing that the Heavyarms was wearing Trowa's clown half-mask, since most shots of the Gundam are from a long distance and the Heavyarms' face is only closely seen for a half-second.
* FullCircleRevolution: Mariemaia describes history as an [[TitleDrop endless waltz]] of war, peace and revolution. She claims her reign will end this, but never explains ''how''. [[spoiler:She also never gets a chance to try given how quickly she's overthrown and the original government restored.]]
* GeorgeLucasAlteredVersion: The movie version actually adds about 20 minutes of additional footage compared to the three episodes of the original. This generally fleshes out the story and characters, adds more action (especially in the climax) and makes the pacing more appropriate for a feature-length movie rather than a three-episode compilation.
* GrandTheftPrototype:
** The modified Operation Meteor became this once the true nature of the original operation was revealed. Duo and Trowa replaced the original pilots for Deathscythe and Heavyarms, Duo by a typical Gundamjack and Trowa taking over for the intended pilot after he died. Heero and Quetra were instructed by their scientists to disobey the original operation on purpose. Wufei chose to go against the plan on his own.
** Also, after arriving on Colony X-18999, Heero and Duo stole two Leos and engaged in battle with Wufei (piloting Altron) and Trowa (piloting Serpent), respectively.
* HeelRealization: Wufei had one during his duel with Heero, as Heero's words brought back flashbacks of him seeing the self-destruction of his home colony.
* HeroicBystander:
** [[spoiler:The nameless soldier who shoots Dekim Barton. The novelization does at least give him a name.]]
** The people who stand up to the Mariemaia Army.
* HistoryRepeats: The central theme of the entire story: as long as humanity exists, war will exist as well. Though Relena believes that humanity can still achieve true pacifism one day, even if they have to fight to obtain it.
** In the novel and the manga, Lady Une tried to deploy the Virgo III from Vulkanus (the Mobile Doll plant from ''Battlefield of Pacifists'') against the Mariemaia Army, but was stopped by Zechs, who told her that doing this would make them exactly the same as the OZ of the past, Une agreed and ordered the Preventers to continue the dismantlement of the Vulkanus.
* IHaveYourWife: A variant. Once Dekim realizes Heero will be able to destroy the Brussels presidential bunker, he tries to get Heero to stop by shouting that Relena is in the bunker with them. It didn't work. Both Heero and Relena knew this had to be done to achieve peace.
* ImprobableAge: If ''Episode Zero'' is to be taken as canon, Mariemaia's 8 years old. Her voice actor sounds a little too old, but the complexity of her lines, and the rather haughty delivery in the dub, feels way beyond her years (even if she is the child of [[spoiler: MagnificentBastard Treize Khushrenada]]). Then again, Mariemaia was ''very'' much manipulated by [[spoiler:her grandfather, SmugSnake Dekim Barton]]. And it's one thing to be taught what to say or repeat what's been taught, and another thing to truly understand it, much less mean it.
* IWillFightNoMoreForever: After the "execution" of Mariemaia, Heero then says he will never kill anyone again, because he doesn't have to anymore.
* MadeOfPlasticine: Relatively speaking, the Gundams are [[AdaptationalWimp significantly downgraded]] from their NighInvulnerable, unstoppable death machines they were in the series, as any single one could take on entire mobile suit squadrons and only a [[TakesOneToKillOne Gundam could defeat a Gundam]]. All together, Heavyarms, Deathscythe Hell, Sandrock and Talgeese III were slowly overwhelmed by the Serpent ZergRush and collectively take a lot of damage from otherwise standard troops, notably with [[WreckedWeapon Sandrock's Heat Shotels getting broken]]. That said, it is explained they were [[ThouShaltNotKill pulling their punches to not kill the enemy pilots]] and the Serpent is the most advanced infantry mobile suits to date, invoking SoLastSeason.
* MerchandiseDriven: See Broad Strokes. All of the Gundams were redesigned obviously with the intent that they could be sold as new models. This is because most of the revenue for Gundam-related content comes from model kit sales.
* MercyKill: At the end, Heero is prepared to put an end to Mariemaia after she was shot by Dekim Barton; [[FaceDeathWithDignity she is willing to accept it]]. He pulls the trigger...and the gun is empty. Mariemaia loses consciousness anyway from loss of blood.
* MookFaceTurn: [[spoiler:A Mariemeia soldier shoots [[SmugSnake Dekim Barton]] after Dekim shoots Mariemaia and says that [[YouHaveOutlivedYourUsefulness he can find a replacement]]. He then apologizes that Dekim had made them betray Treize's ideals.]]
* MyFistForgivesYou: An inversion. When Heero, Duo and Trowa are in the colony control room with Mariemaia soldiers, Heero asks Duo to hit him...then returns with a punch to the gut that knocks the wind out of him so Trowa can pretend to take him prisoner and preserve his cover. In effect, Heero explains, he let Duo get in his revenge shot ''first''.
* NecessarilyEvil: Relena seems to view the existence and necessity of the Preventers as this. Even in a world without conflict, there would still be battles, with the Preventers stepping in to keep the peace.
* NoMrBondIExpectYouToDine: Relena, when held hostage by the Barton clan.
* NonLethalKO: during the final battle, [[spoiler:Zechs]], Noin, Duo, Trowa and Quatre take on Mariemaia's Serpent army, incapacitating the suits but not killing the pilots.
* NoodleIncident: No explanation is given as to how [[spoiler:Zechs]] is still alive, or what he's been up during the year he spent officially dead.
* NoSenseOfPersonalSpace: Trowa Barton found it necessary to drape himself over a teenage boy, ''just'' to show him a family photo. Creepy, much?
* OffscreenMomentOfAwesome: How did Lady Une managed to sneak inside Mariemais's highly secured bunker? It wasn't shown, but it must have been amazing since MS were around the perimeter, all doors were locked and armed guards were everywhere.
* OhCrap: Mariemaia is the poster child for this at the end of Endless Waltz when she tries to call Heero's bluff:
--> '''Heero''': Your shelter is secure, is it?\\
'''Mariemaia''': Of course it is! See for yourself just how powerless you are!\\
'''Heero''': Roger that.\\
'''Mariemaia''': ''(gasp)''
* ProtectedByAChild: [[spoiler:Poor, poor Mariemaia. Well, at least she survived.]]
* PuppetKing: It's rather obvious that Mariemaia is just a figurehead; Dekim is the true mastermind and villain of the film.
* PuttingOnTheReich: The Mariemaia Army uniforms are very reminiscent of Nazi era uniforms. The pilots wear a getup modeled on the Hitler Youth uniforms. Regular Mariemaia grunts get bright pink Reich uniforms. Even the Preventers' dark uniforms on the ESUN side bear some stylings reminiscent of the Reich.
* RecapEpisode: The box set comes with a four-episode OVA entitled "Operation Meteor" which consists almost entirely of footage from the original series to present character profiles of the pilots, Zechs, Relena, Une and Trieze, with some extra voice-overs.
* TheMole: Trowa joins the Mariemaia Army undercover. It was short-lived, however; as soon as he tries to assassinate Dekim, Wufei shows up holding a sword to his neck. He then joined the Mariemeia army for real, [[spoiler:only to defect when Duo appears. He just wants information, after all.]]
* RenegadeSplinterFaction: It turns out [[spoiler: the Gundam pilots]] were this to the Barton Foundation. Operation Meteor was originally meant to be the first steps for Barton's conquest of Earth. Uneasy with the potential two billion casualties, [[spoiler:the scientists and pilots decide to ignore their orders, and focus their attacks on OZ]].
* RuleOfThree: It takes 3 shots from the Wing Zero's buster rifle to breach the Brussels presidential bunker. Of course, it also turns out that's all that the Wing Zero can handle firing off before its badly-battered frame falls apart.
* SlippingAMickey: Relena's tea is drugged at a meeting concerning the L3 colonies, and she is soon being held hostage by the Mariemaia faction.
* SmugSnake: Dekim Barton.
* SymbolicWings: Wing Zero's upgraded wings are birdlike, whereas Deathscythe Hell's cloak reveals batlike wings, furthering their respective themes.
* TechnicalPacifist[=/=]MartialPacifist: The Preventers, or at least that's the idea behind their existence. Relena and her ESUN supporters knew that even in a world without conflict, an armed presence would still have to step in to prevent potential trouble from boiling into another war. It's also described as a compromise between Relena's supporters and more conservative political parties to keep militarism in check.
* TemptingFate: [[spoiler:"See for yourself just how powerless you are!" Really, Mariemeia? You're telling that to a pilot of the mecha which, [[OneManArmy because of its presence in the battlefield]], [[ThereIsNoKillLikeOverkill changed the tide of the Eve Wars]], [[IdiotBall and that's your response?]] You're just lucky that he [[NoSell No-Selled]] your shelter defense. No, wait. You're lucky because ''[[MoralityPet Relena]]'' is there. And even then, both Heero and Relena weren't afraid to kill the latter and be killed by the former, respectively, if that's what it took. Meaning she was lucky only Dekim needed to and did die at the end of it]].
* ThemeNaming: The Preventers using element based codenames:
** Sally: Water.
** Noin: Fire.
** [[spoiler:Zechs: Wind.]]
** Not revealed on-screen, but by elimination, Lady Une is Earth.
* ThouShaltNotKill: The Gundam Pilots decide to spare the Serpents' pilots and not kill anyone if they can help it, so as a result they aim to disable and not destroy them.
* TitleDrop: See above quote.
* TogetherInDeath: Both the manga and the novel make it clear that [[spoiler: not only did Heero plan to destroy the shelter with Relena still inside, he also intended to kill himself after so she won't be alone]]. Fortunately, it never came to that.
* VillainRespect: Mariemeia tells Relena that she admires how she was once Queen of the world.
* WhamLine: [[spoiler:Heero tells Duo that the Trowa they know isn't the real Trowa. Duo simply replies that he almost forgot.]]
* WhatTheHellHero: The battle between Wufei and Heero seems to be also an argument of who deserves this trope more. Wufei for betraying the Gundam Pilots and keeping war going or Heero for living in a peaceful world at the cost of both the soldier's lives and their now perceived uselessness.
* WhatMeasureIsAMook: Invoked, Defied, and Conversed with Wufei, who joins up with Dekim because he believes the current worldwide peace is a lie built on the deaths of soldiers, whom he feels were discarded like tools. Deconstructed and Reconstructed in his conflict with Heero.
* WhereAreTheyNowEpilogue:
** Duo, together with Hilde, is now running a junkshop.
** Trowa returns to Catherine Bloom and the circus troupe.
** Quatre, reunited with the Maganac Corps, helps in the restoration of the colonies.
** Wufei joins the Preventers as Sally's partner.
** [[spoiler:Zechs and Noin take off to Mars for a terraformation project.]]
** Lady Une [[spoiler:takes Mariemaia, who has survived but is now paralyzed, to]] visit the grave of Treize Khrushinada.
** Heero and Relena's ending is different from the OVA and the film (the others have at least consistency): the OVA shows Relena at a press conference as Heero watches over her from the shadows, while the film shows the two of them in different places at once. The Manga adaptation shows a THIRD ending where Heero becomes Relena's bodyguard. The Novelization tried to bridge the gap between OVA and Movie by saying that Heero watches over Relena, and then leaves.
* WingShield: The Wing Zero's Neo-Bird mode has been replaced with a set of angelic wings that double as shields against attacks and atmospheric reentry.
* WorfHadTheFlu:
** From the damage it sustained during its duel with the Nataku (and subsequent re-entry through the atmosphere), the Wing Zero appears above the Brussels presidential bunker, only with enough strength to fire its Twin Buster Rifle three times, [[spoiler:with the third shot's recoil completely obliterating the Gundam.]]
** A variant occurs with the other Gundams' last stand. It's stated outright that if they didn't care about saving the enemy pilots, it would have been a CurbStompBattle in their favor. However, since they're fighting carefully to make sure all of the enemy pilots survive, their Gundams get worn down by pure attrition from the prolonged battle. Add to that it's entirely likely wear-and-tear from the year-previous large space battle probably wasn't dealt with, what with the Gundams being sent to be tossed into the Sun and all.

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