* AlternateCharacterInterpretation: It's implied throughout the series that Zero regains at least some of his memories. What he remembers and when he remembers it is mostly left unknown, as well as how much any of that memory influences his decisions in any given situation.
** The game more or less spells it out that Ciel has feelings for Zero short of actually confirming it. Fans have then speculated that the final line of the series might have actually been an AnguishedDeclarationOfLove.
* AnticlimaxBoss:
** Elpizo from the second game. If you can avoid his six-orbs energy absorption attack, you can pretty much dodge anything else he throws at you. His second form is arguably even easier, basically being a large floating target in the middle of a large empty walled room with easy-to-dodge attacks. Compare this with the spike-laden stage that you have to traverse to get to him, as well as the BossRush in between. A few blows from your charged Z-Saber will destroy his second form in a matter of seconds.
** Omega plays this straight and then subverts it. His first 2 forms, thanks to the GBA limitations, are slower and predictable than what is implied from the story. His final form, however, is TheBerserker LightningBruiser capable of thrashing you within seconds if you're not careful.
* BrokenBase: No, really. [[spoiler:Zero's death]] is still a hot debate, no matter the [[{{Jossed}} Jossing]]. And, remember that the ''Zero'' series officially ended ''in 2005''.
** ItWasHisSled: [[spoiler: Thanks to that long-standing argument, no one would be surprised about Zero's fate now.]]
** Well, kind of. [[spoiler: The Official Complete Works didn't really elaborate on his fate, and at best stated that he was missing in space. For a thing that would elaborate on a lot of things in the ''Zero'' mythos, it really seemed to screw up when it came to revealing Zero's fate.]]
* CompleteMonster: [[Monster/MegaMan Has its own page]].
* ContinuityLockout: The four games are so story-heavy that they only really make sense storywise when played in order back-to-back. The DS CompilationRerelease thankfully makes this a lot easier.
* EnsembleDarkHorse:
** Harpuia. Also one of the most well developed characters in the franchise, which contributes to this.
** Omega, one of the more popular villains in the Mega Man franchise. Popular enough to come back as a bonus boss and an [[InfinityPlusOneSword infinity plus one artifact]] in ''VideoGame/MegaManZX''.
* EvilIsCool: Copy X's armor would spectacularly break any ''VideoGame/MegaManX'' game, essentially being ''X5's'' [[GameBreaker Falcon Armor]] with extra firepower and Charge Man's weapon thrown in for fun.
* FauxSymbolism:
** At the end of the first game, Cyber-Elf X starts projecting an image of himself in a blue robe when talking to Zero. A Cyber-Elfy halo appears above his head in this form.
** Copy X, even moreso. If his first form full of angelic wings aren't enough, in his OneWingedAngel form, he almost literally turned into a seraphic angel. Add to the fact that he's fighting Zero, a crimson-horned reploid.
*** Given the way Copy X acts and his sinister eyes, his transformation is closer to a FallenAngel.
* FanficFuel: The ending of the series. [[spoiler: The fans don't seem to accept Zero's death, and as Dr. Weil cannot die, they "know" he's still out there...]]
* FoeYay: Three of the Four Guardians have this going on with the titular Zero (the ones that isn't Phantom).
* FunnyAneurysmMoment: The antagonists of the first three games in this series all have the Greek letter Omega [[BroughtToYouByTheLetterS as their symbol]]. Sure most of them are {{Knight Templar}}s, but they still [[WellIntentionedExtremist mean well]], fighting for the sake of humanity. But later we're introduced to an actual character named Omega, who is everything that the antagonists (except one) ever stood against.
** Somewhat related: in ''VideoGame/MegaManX2'', Zero, [[spoiler:freshly BackFromTheDead]], ''very easily'' destroys a weak clone of himself that the BigBad made. Cue the third game, where [[spoiler:Omega (the same one mentioned above) is the original body of Zero, while ''TheHero'' is the clone]]. But it was subverted, [[spoiler:the clone Zero didn't mind the irony of the situation he was in, and goes on to defeat Omega Zero ''easily''. Also, TheHero may be using a duplicate body, but the mind is real; he is still the ''real Zero''. Omega Zero is now just a mindless puppet]].
** This line [[DudeNotFunny loses some of its humor]] if you consider the only girl he's ever [[VideoGame/MegaManX4 been shown with...]]:
-->'''Resistance Girl:''' You're terrible! Even though you've kissed me before...Shoot, you probably forget every girl...
* GoddamnedBats: The spiked wheel enemies. They are inordinately tough (two saber slashes when one will do in most anything else that moves), coming rolling from offscreen towards you (or occasionally from behind) with no warning, do a ridiculous amount of damage (more than virtually any other normal enemy), move just fast enough that it would take split-second reflexes to dodge them, spawn again if you move mere ''pixels'' backward from where they appeared, and are sometimes dropped in by lifter robots for added cheapness.
* HarsherInHindsight: In ''VideoGame/MegaManX4'', This exchange is made by Sigma and the General in regards to humanity's views on Reploids when the former was trying to recruit the latter:
-->'''Sigma:''' It's about the Maverick Hunters, General. They are far too eager to please the humans and hunt down the Reploids! Do you believe they pose a significant threat?!
-->'''General:''' Perhaps...
-->'''Sigma:''' You already know the truth, General! Their sole mission has been to destroy any Reploids who fail to do as the humans order!
** As this series, and especially Dr. Weil's speech to Zero in ''Zero 3'' showed, Sigma actually turned out to be ''right.''
-->'''Dr. Weil:''' Hehehehe...How pitiful. Of course, a Reploid like you would never understand. The joy of ruling all that you see...Only a human could possibly understand!
-->'''Zero:''' A...human?
-->'''Dr. Weil:''' That's right! I'm a bona fide human. The creator of Reploids...A human being!
-->'''Zero:''' ...
-->'''Dr. Weil:''' The desire for power. The joy of making everything work for you. You have no way of experiencing this without a human brain. It's the ultimate joy! No mere Reploid could ever understand!
** ''That being said,'' Sigma (and by proxy, Weil) was only ''partially'' right - there's obviously ''some'' humans who think like that, but in this series, considering all of Neo Arcadia's propaganda, who would blame them? To say that all HumansAreBastards in this instance would be to use the same fallacy that Yggdrasil used in Anime/DigimonSavers (using evidence of the actions of one CompleteMonster[[note]]who, amusingly enough, was a ''lot'' like Weil[[/note]] to tar humanity with the same brush). Plus, part of Dr. Weil's motivation (according to the supplemental material and before he jumped off the slippery slope) was that he was getting back at the Reploids for their constant violent uprisings, [[SelfFulfillingProphecy which were heavily precipitated by the Sigma Virus.]] Of course, that reasoning shows that he had a warped mindset from the start, believing the entire Reploid race should be held responsible for what insane terrorists and criminals members of their race have chosen to do, making him pretty much the same as Sigma, but on the opposite side of the fence.
* ItWasHisSled: Dr Weil and Copy X's very existences are common knowledge by now. [[spoiler: And, as mentioned above, Zero's DyingMomentOfAwesome.]]
* ItsHardSoItSucks: Regarded as this by some, to the point that the DS CompilationRerelease includes an "Easy Scenario" with includes lots of 1-ups and all of the cyber-elves. You can still die even in this mode, given how NintendoHard it is.
* LoveToHate: Ask any of Weil's fans, they'll say how horrifically despicable he is what makes him such an effective villain.
* MemeticSexGod: Zero. No, really.
* MoralEventHorizon: Copy X was just more of being morally ambiguous in the first game (performing genocide on Reploids because of the energy crisis, supposedly for the better for humanity). However, in the third game, he's willing to launch a missile to a city block full of innocent humans just to obtain the Dark Elf. At this point, HeroAntagonist [[NobleTopEnforcer Harpuia]] can't stand it anymore and defects from Neo Arcadia. A bit later, when Copy X and Weil contact the resistance to cooperate, [[RebelLeader Ciel]] cites this event as why they can't be trusted. To be fair, Copy X is reborn as Copy X Mk. II by the ObviouslyEvil Dr. Weil and he also manipulates Copy X to do so. Clearly Weil must have done things in him, including the ElectronicSpeechImpediment and [[spoiler:the booby trap implanted in his body which activates when he goes OneWingedAngel]].
* PlayerPunch: Elpizo aims for getting the Dark Elf, and to do so, he had to destroy the [[SealedInsideAPersonShapedCan seal]], X's body. [[spoiler: When Zero finally catches up to him near the seal, he [[ForcedToWatch forces Zero to watch]] by binding him with the Baby Elves' powers as he stabs X's body, destroying it and releasing the Dark Elf.]]
* RoboShip:
** Ciel with Zero...maybe...well, it ''is'' a popular pairing.
*** ShipTease: ''Lots'', which warranted the RoboShip "theory" above. In fact, some of the tropes listed in her bio are ShipTease in themselves (AngerBornOfWorry and the TearJerker, anyone?).
*** FanPreferredCouple: Thanks to the large amounts of the aforementioned ShipTease (whether it's a case of RelationshipWritingFumble or not), many fans warm up to the pairing better than the more "canonical" Zero/Iris. Then again, [[StrangledByTheRedString regarding the latter pair...]]
*** {{Starboarding}}: Unfortunately, because of Zero's mentality in this department, fans have settled for this.
** Neige with Craft, the most blatant example in the ''entire [[strike: series]] franchise'' (besides [[VideoGame/MegaManX4 Zero/Iris]]).
* RonTheDeathEater: A rare canon (at least, WhatCouldHaveBeen) example: [[spoiler:X becomes a tyrant KnightTemplar dictator and Zero is the hero with a different body. Though probably Keiji Inafune had a reason for X becoming bad...at least, we can see the potential of it from the backstory for this game.]]
* SavedByTheFans: X. Not from death per se, but from being an AxCrazy dictator. Similar to what happened to [[KingdomHearts Axel]], this resulted in his inaction with regards to the Guardians' attempts to kill Zero. The sequels give him other things to worry about and the issue really doesn't come up again.
* ThatOneLevel: Neo Arcadia Shrine, part 1. [[GoddamnedBats Those.]] [[PlatformHell Fucking.]] [[PunctuatedForEmphasis BIRDS!!]]
** And that's not all. {{Temporary Platform}}s abound. Temporary Platforms that have no side grip, ''shoot bullets downward'', leave no margin for error, and are placed above enemies which you will likely land on should you fall. There's also ''three bosses''.
** Neo Arcadia ''Tower'': SpikesOfDoom. EVERYWHERE!
* ViewerGenderConfusion:
** Harpuia's voice is MegumiOgata, a woman. Plus his name is derived from the legend of the Harpy, half bird, half-''women''.
*** It does not help that he's wearing the exact same clothes as Leviathan (the female Guardian) with a PaletteSwap (what appears to be a [[BareYourMidriff midriff-baring shirt]] and...panties).
** Cubit Foxtar, possibly overlaps with ShesAManInJapan.
*** Made more confusing by being based on a Kitsune, which can change genders. Makes more sense if you assume that his inhuman battle form is his true form.
** There's also Anubis Necromanc''ess'' (boss in ''Zero 1'' and ''3''), confirmed to be male [[note]]His name in Japan is Anubistep Necromances, with one "s"[[/note]], and Polar Kamrous (in ''Zero 2'') which, despite the matching build and deep voice, is female.
*** Weirdly enough, the Complete Works book refers to Kamrous as [[FlipFlopOfGod male.]]
* WhatDoYouMeanItsForKids: The entire series qualifies, for the reasons listed on the [[NightmareFuel/MegaMan Nightmare Fuel page for the entire franchise]].
* TheWoobie: Ciel gets extra points for this. [[Woobie/VideoGames Hoo-boy...]]
** Alouette is implied to have gone through a BreakTheCutie livelihood, and might have suffered even worse, if Ciel hadn't found her.
** For the record, how about [[KickTheDog poor]], [[KilledOffForReal poor]] [[BigGood X]]? [[spoiler: Let's just put this in review: The only cure for the virus they had worked tirelessly looking for for well over a centuy is weaponized into a living maverick-maker. His best friend's body is stolen and converted into an ultimate weapon that wipes out most of the planet's already-perilous population. His best friend goes into an intended-eternal stasis, leaving X with basically no shoulder to lean on. He's forced to manage the virtual entirety of the world's remaining population and all maverick activity by himself. He is forced to effectively kill his body to seal the aforementioned corrupted cure which not only leaves him off, but his soul is split into fifths. X is forced to watch as the Copy made to take his place ruins the haven he'd so desperately fought to preserve, and his "offspring" are tricked into being assassins and strongarms for the sociopathic copy. Finally, X is murdered in his comatose state by some minor villain who just wanted the Dark Elf. He did not even get a chance to fight back. He finally spends the rest of the following game slowly, slowly dying and using every precious ounce of power for the sake of others.]] Jeez, man.
** IronWoobie: Almost all the tragedies in the ''X series'' are inflicted on Zero, and even more are piled on here. Like the fact that [[spoiler:he wakes up seeing the current state of the world, and freshly awoken, he has to continue fighting, ''again'']], and [[spoiler:he was able to finally return the world to a peaceful state, which was what he and X have been fighting for a long time, only for him not to see it come to fruition, seeing as ''he's dead''...]]
** StoicWoobie: After looking at Harpuia's motives, personality and the situation he's in, it's pretty easy to feel sorry for him.
** Reploids are turned into a WoobieSpecies by Copy-X's actions, and while basically turns everything into a CrapsackWorld.
* {{Woolseyism}}: Some of the boss' names are changed overseas. In particular, Dr. Weil's name was originally Dr. Vile. There's already [[VideoGame/MegaManX another guy who's named Vile]] (who is originally called [[Franchise/StarWars V]][[ShoutOut A]][[WritingAroundTrademarks VA]]), so the name change is to avoid confusion.

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