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The major antagonists and villains of the X series. The majority are Reploids who are Mavericks and are organized according to game in which they are introduced.
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Mavericks

Mavericks are Reploids who rebel against humans and are a threat to them and other Reploids. The causes of a Reploid becoming a Maverick could be software bugs, viruses, reprogramming, or even by their own free will upon deciding that humans are inferior and too weak to live (or some variation of this thought). They are main antagonists of the series.
    Sigma 
https://static.tvtropes.org/pmwiki/pub/images/mmx_-_sigma_37.jpg
Voiced by: note 
The primary antagonist of the X series. Bald, scarred, and murderously insane; the former leader of the Maverick Hunters now seeks nothing less than the destruction of the people he was built to protect.
  • Adaptational Villainy: In Mega Man: Maverick Hunter X and its prequel The Day of ∑, not only are his actions much worse than anything he's done in the later games, it's also implied that everything he does are out of his own free will, rather than being infected with the Maverick Virus.
  • Animal Motifs: Wolves. He has a pet robot wolf named Velguarder, his One-Winged Angel form in the first game is a large robotic wolf, and his symbol is the Greek letter Sigma designed as a wolf.
  • Anthropomorphic Personification: He's the living will of the Maverick Virus. It's heavily implied that as long as the Maverick Virus exists there's always a chance that he could return.
  • Arch-Enemy: Of X and Zero. Before the final battle with him in X3, Sigma even comments on how he and X are "always destined to meet".
  • Arc Welding: His evolution talk calls to mind later Big Bads Serpent and Lumine. It's not clear where Inafune was going with this, as the remake series was canceled.
  • Arc Words: "Evolution requires sacrifice."
  • As Long as There is Evil: Tells X this when defeated in Xtreme, promising to haunt him and Zero for as long as they live.
  • Attack Its Weak Point: Most of the time, his second body's weak point is located on the head.
  • Ax-Crazy: His sanity seems to wane as the games go on, where he becomes less concerned with helping Reploids advance in their development and far more obsessed with killing the heroes while wiping out millions of innocent lives in the process. And in the reboot of the first game, he already shows signs of this, such as laughing maniacally while looking down at the ruins of a city he obliterated via missile launches.
  • Back from the Dead: Again and again and again and again... at last count he's been killed ten times. Capcom swears he's dead for good post-X8. In the strictest sense, the only times where it seemed like his death might stick were in X3, where he's first hit by a real anti-virus, X5, where Zero destroys him after most of the Sigma Virus has been eradicated from the Earth, and X8, where he is destroyed on the moon.
  • Badass Boast: He loves giving these out.
  • Badass Cape: In his X1 and X5 forms. Subverted with his tattered form in X6 and X7.
  • Bad Boss: In the non-canon Vile Mode of Maverick Hunter X, he allows Vile to kill a ton of his Mavericks, including his high-ranking generals, to test Vile's potential.
  • Bald of Awesome: X4 reveals he was once the leader of the Maverick Hunters, and was The Hero in his fight with a Maverick Zero, which triggered his fall into evil.
  • Bald of Evil: He is built to be bald, unlike many other robots, and is a terrible Reploid. Though X4 reveals he was once the heroic leader of the Maverick Hunters.
  • Batman Gambit: In X4 and X5, his plans rely on the personalities of General, Colonel, X, Zero, and Maverick Hunter policy. This is turned way up in the manga rendition of X4, where he's relying on the Repliforce Coup (and was the setup of it thanks to Jello Man/Double), wherein all the Repliforcers are absolutely crazy (like the necromantic Web Spider or the "I'm going to kill my own troops" Slash Beast).
  • BFG: In X7, one of his attacks has him pull out one of these.
  • BFS: His Weapon of Choice. Special mention to X8's BFS. The animated opening to X3 depicts the first game's saber as a BFS.
  • Big Bad: Of the series as a whole, with the exceptions of X6 and X8.
  • Breath Weapon: In Maverick Hunter X, Sigma's wolf form can breath fire from its mouth. In X5 and X6, Sigma can fire lasers from his mouth.
  • Brought to You by the Letter "S": All the Mavericks directly under Sigma would have his symbol somewhere on their person.
  • Came Back Strong: In X5. After getting inflicted with Doppler's antivirus in X3, and getting destroyed again in X4, Sigma is back yet again, and has not only completely overcome the effects of the antivirus, but is even more powerful than ever. He can bind himself directly to machinery and transform it to his will, and trying to destroy him again only allows the Sigma Virus to spread across the entire planet!
  • Came Back Wrong:
    • Gate revived Sigma. Unfortunately, he apparently ruined his sanity in the process. He gets better by X7, though. Curiously, when seen holding conversations with Red as "The Professor" and during the ending of X7, Sigma appears in a state of disrepair not unlike in the sixth game. This suggests that, between spreading himself too thin across the globe during the Earth Crisis and his botched resurrection only a few weeks later, while Sigma's mind eventually recovered, the damage to his body and programming/viral coding may have been permanent, perhaps leading to his ultimate defeat in the following installment.
    • It's implied that this first happened earlier, just after X3. At first, Sigma could manifest in his viral form and attempted to possess X to finally defeat him, only to be struck with Doppler's anti-virus. While his return can be explained by Berkana's experiments, he never again tries to possess X or assumes his viral form again, and instead shifts his focus to Zero.
  • Canine Companion: Velguarder. He sics him on you before fighting you himself in the first game.
  • The Coats Are Off: He throws away his cloak before fighting you in X1, X4, and X5.
  • Continuity Nod: His One-Winged Angel from X5 is Gamma, the Final Boss from Mega Man 3. And it was given to him by Dr. Wily.
  • Create Your Own Villain: In a meta-sense. Sigma claimed humanity and the Maverick Hunters would turn on Reploidkind if they stepped out of line, thus necessitating their destruction. His and his successors' many years of attempted genocides and near-apocalypses would go on to create Dr. Weil.
  • Darth Vader Clone: He used to work for the heroes before being corrupted by an outside force, is often baritone when given a voice, and his design from the first game borrows quite a bit from Vader, from his cape, armor, and a lightsaber-like Laser Blade.
  • Dead All Along: Neither X nor Zero ever were made aware, but X4 and Word of God clued in the audience that the "Sigma" who incites war throughout the series isn't even the genuine article. Commander Sigma, the Maverick Hunter, ceased to be when he first encountered Zero, long before the series even started. His consciousness was overtaken and assimilated by the Maverick Virus, causing it to mutate into the Sigma Virus, which walked around in his body until X first destroyed him.
  • Deader Than Dead: In X8, as he died on the moon. This is somewhat confirmed with his absence in Command Mission (set in 22XX). Coupled with the events of X4-X7, it is speculated that the Virus may have lost much of its potency on the moon, judging by Sigma's unfinished true body and Lumine's remarks after Sigma is defeated. Even then, the presence of his DNA in the copy chips of the New-Gen Reploids (whose production was restarted later on) likely provides a backdoor for him to return anyway. However, By the time of Mega Man Zero, X is said to have used the Mother Elf (a "Sigma Antibody Program" created from the Maverick Virus data in Zero's body) to erase all traces of Sigma's DNA and end the Maverick Wars.
  • Degraded Boss: In the later part of the secret final stage of X8, you can see multiple New Gen Reploids transforming into Sigma to fight you. They all die easily like other mooks (though they're among the harder of mooks), and their attacks aren't as strong as real Sigma's.
  • Disc-One Final Boss: In X8, which served as a Meta Twist since usually Sigma was the one who was manipulating the supposed main bad guy, instead of the main bad guy manipulating Sigma.
  • Enemy Civil War: His X4 plan is to set one of these up. It works perfectly because the Repliforce is... not very bright.
  • Engrish: Used deliberately in X6 to show how badly deteriorated his mind is after his imperfect resurrection. Then again, the translation was already pretty terrible, so who knows how much was deliberate.
  • Everything's Deader with Zombies: His X6 form.
  • Evil Costume Switch: Wears a spike version of his outfit at the end of the OVA.
  • Evil Is Bigger: Regardless of what body he's using, he's always much larger than X and Zero.
  • Evil Laugh: He loves doing this.
  • Evil Plan: It's always to destroy the humans, somehow.
  • Evil Sounds Deep: Particularly in X4, where his voice sounds similar to a slasher movie villain, and in X7, where he sounds like Dr. Claw.
  • Evilutionary Biologist: He follows the robotic version of this, especially in Maverick Hunter X, where he wants to see the hidden potential in Reploidkind. And...
    Sigma: "Evolution requires sacrifice."
    • In the aftermath of the X vs. Zero battle in X5 (should Zero not go Maverick), Sigma similarly expresses disappointment that Zero was unable to evolve to his "true self." Should Zero be brought to the final battle in Zero Space against Sigma, Sigma gives one more try at tempting Zero with the power he'd (re)gain when awakened, but Zero doesn't bite.
  • Expy: Of Braiking Boss from Neo Human Casshern and Casshern Sins. Also, his first forms in the SNES games are based on Star Wars (lightsaber), Wolverine (claws) and Captain America (shield throws).
  • Eyes Are Unbreakable: The attack that gave him his trademark scars did nothing whatsoever to his actual eyes. Subverted when Maverick Zero does, in fact, gouge out one of his eyes along with half of his face, and in Maverick Hunter X where he, in his One-Winged Angel form, is shown having his right eye missing.
  • Eye Beams: In X4 and X8.
  • Eye Scream: Both Maverick Zero and X have gone for his eyes in the past. The latter inflicted burn scars in the process. Since Sigma's a robot, we are usually spared the worst of this trope.
  • Face–Heel Turn: Was once a member of the Maverick Hunters and a noble Reploid at that, but then he was infected by Zero's virus and the rest is history.
  • Fallen Hero: He wasn't just a random Maverick Hunter who turned to evil: he was their leader and became the biggest threat to the world and the leader of the very enemies he fought in the past.
  • Fantastic Racism: He believes humans to be inferior to Reploids, and most of his plans through the series involve the slaughtering of the human race.
  • Fatal Flaw: Pride. His being infected in the first place is partially his fault for screwing around when fighting Maverick Zero in X4. That and he has some terrible judgment regarding his battle bodies, as noted in One-Winged Angel.
  • Faux Affably Evil: Only in X1, before his decreasing sanity, he acts quite polite to X before their fight, congratulating him for making it this far, yet saying he is almost as good as he was.
  • Fighting a Shadow: Eradicate his current body, his viral self is still intact. Erase it, and a backup copy will pop up later in a new body. It takes killing him on the moon to finally destroy him, supposedly because his viral form will (presumably) just fade away to nothing with no other robots to infect there.
  • Fire, Ice, Lightning: Sigma's final form in X4 has a move consisting of three robotic heads- one blue, one red and one yellow. The red one attacks with fire, the blue one with ice and the yellow one with lightning.
  • Final Boss: He appears as the final adversary in all games in one form or another with the exception of X8 and Command Mission, the former where he's the penultimate boss and the latter where he's nowhere to be found.
  • Fling a Light into the Future: A villainous take on this. In X8, Sigma seemed to finally acknowledge his increasing decay and limited time, so he hijacked the production of New Generation Reploids to instill his personal data across all of them — save for Axl, who narrowly avoided the impromptu "adoption". While Sigma's next stand appeared to have finally been his last, it didn't matter, because he effectively created an entire line of Sigmas to succeed him.
  • Foreshadowing: Sigma, when trying to recruit General to revolt against humanity, claims that humanity will try to destroy anything that doesn't obey them completely. Come the Mega Man Zero series, as well as Weil's Badass Boast in Zero 3, it turns out Sigma was right. Though it may have been due to constant, genocidal Reploid revolutions that he personally helped cause.
  • Genius Bruiser: A brilliant tactician and genius, and is more than capable of fighting the heroes.
  • Giant Hands of Doom: In his second form in X1, X5, and X7.
  • Grand Theft Me: Tried to pull this on Red in X7, but failed due to him being Axl. Before that, he also attempted this on X in X3, but either Zero or Doppler blasted him before he manages to.
  • Grim Reaper: His first form in X4, while orchestrating a massive civil war between two armies, and then trying to use a Kill Sat to commit genocide. He even comes complete with an Laser Scythe!
  • Hijacked by Ganon:
    • He succeeds Wily in this department. The list of his hijackees include the X-Hunters in X2, Dr. Doppler in X3, the Repliforce in X4 (although this was lampshaded by one of the bosses, and Sigma's involvement is strongly hinted at as early as the cutscene right after the intro stage), Gate in X6, and the Red Alert Syndicate in X7. Surprisingly, this doesn't happen in X5 and X8; X5 has Sigma acting out a plan made with a partner who's implied to be Dr. Wily, and in X8 Sigma is Hijacked by Lumine.
    • X6 is also an interesting case in that Gate is still the true mastermind of the game, as Sigma's current incarnation is an unstable zombie. He just kills Gate after his defeat, and X and Zero go after him because... well, it's Sigma.
      • X practically lampshades Sigma's presence in X6:
    X: Sigma... we don't have time to deal with you. We need to rebuild our world and I can't let you get in our way. It doesn't matter how many times you'll come back... I'll beat you!
  • Hive Mind: All robots who are infected with his virus are subject to his will. Later this is also implied to be the case with the copy chips in the New Generation Reploids (excluding Axl) as they all have Sigma's DNA within. And because Sigma is the controller of it, he's the center of the hive mind.
  • Horned Humanoid: Continuing the Biblical symbolism present in X8, Sigma's true appearance in that game (as opposed to the Copy Sigma fought at the Gateway) is a devil-like figure with slightly distorted facial features, the scraps of metal that constitute his incomplete body seemingly held together only by the Sigma Virus.
  • Humongous Mecha: His X5 and X7 forms are by far the largest bosses in the series.
  • I Have the High Ground: just before his duel with X in the X3 opening. Also, during the first half of the fight with him in X4, Sigma remains in midair and out of reach from your attacks.
  • I Let You Win: In X5, the first boss fight is against Sigma in the form of a large floating head. After the player defeats him, a virus breaks through Earth, which was what he wanted. Zero clearly states "he lost to us on purpose!"
  • I'll Kill You!: In X6, he's reduced to just wanting to kill the heroes, having his mind deteriorate. "THE BADDLE HAZ JUSD BEGUNN!" "IWILLSHOWYOUWHATATERRORISALLABOUT!!" "JUSDIE X!!" "ZELLLLLLO!!!"
  • I Need You Stronger: Why he doesn't up and finish X at the end of The Day of Sigma. He also spares Zero because he doesn't know what he is or exactly what he is.
  • Ironic Echo: In the OVA, Sigma tells X that there are times that X should never hesitate to pull the trigger as words of encouragement and also a lecture after an incident where Sigma had to get involved in decommissioning the Maverick due to X hesitating after it used a captured soldier as a Reploid-shield. Sigma later says that exact thing when he is strangling Zero after becoming Maverick to taunt X, and unveiling that he's going to nuke Abel City to the ground as the start of his Reploid rebellion.
  • Joker Immunity: Keeps getting killed (sometimes dying twice in a single game!), but he just will not die due to his form as a sentient computer virus, and since he's in the future with robots galore, there's no shortage of things to bodysurf into. However, he finally gets it revoked in X8, where after getting blown up on the Moon of all places, he finds that there's nothing left to jump into on its barren surface, and dissipates harmlessly and somewhat anticlimactically. Even assuming that didn't finish the job, the Zero series reveals the Mother Elf anti-virus program basically eradicated both the Maverick and Sigma Viruses from the world, ensuring that Sigma would never be able to return.
  • Kick the Dog: Employs a particularly bad verbal one to Zero before their battle in X4. After revealing how he orchestrated the conflict with Repliforce, which led to the death of Iris at Zero's hands, Sigma cruelly taunts the emotionally torn-up Hunter with "Iris is waiting for you!"
  • Kill All Humans: His goal, in order to lead the way for Reploid evolution.
  • Killed Off for Real: In X8, finally. And even assuming that wasn't enough, the backstory for the Mega Man Zero series reveals that the Mother Elf program eventually eradicated the Maverick Virus once and for all, completely and utterly destroying any trace of Sigma for good.
  • Lantern Jaw of Justice: Inverted with his massive Chin-Butt of Villainy.
  • Large and in Charge: Even before he goes One-Winged Angel, he's pretty tall and the leader of the Mavericks.
  • Large Ham: Especially at the end of The Day of Sigma OVA. He's no slouch in the other games, either. And his hamminess grows as his sanity decays to the point that by the eighth game, he's constantly shouting all his lines.
    Sigma: "Come and get me X! The time has come to prove your mettle against me. This fight will decide the fate of all Reploids! The battle may be over, but the war is just beginning! MUWAHAHAHAHAHAHAHAHAHAHA!!"
  • Laser Blade: His weapon of choice in X1 and X8.
  • Last Breath Bullet: In X5, Sigma starts it by shooting X and Zero at the same time with a back attack. Zero has enough power left to give a parting counterattack as he fades away, finishing Sigma off.
  • Letting the Air Out of the Band: A computer variant as described on the page after being once destroyed by Zero.
  • Lightning Bruiser: In most of his (first) forms, Sigma is incredibly swift and agile, and has incredible strength to go with it.
  • The Man Behind the Monsters: All of the humanoid Sigma's henchmen are all animaloid, save for his various Dragons.
  • Manipulative Bastard: Pre-decay, anyway. However, some say that he's still this post-decay.
  • Meaningful Name: Along with Zero's name: Keiji Inafune says that Sigma and Zero basically represent the idea that nothing is absolute. Sigma was a powerful leader of the Maverick Hunters but after Zero passed the virus to him, his allegiance changed. Circumstances can change anything, and nothing is absolute.
  • Mighty Glacier: In many of his One-Winged Angel forms, he trades speed and agility for pure power. This is also evident in his first form in X6 where his movements and attacks are extremely slow, but very powerful.
  • Motive Decay: Sigma was once a (probably) charismatic revolutionary. Upon turning Maverick, his initial goal was for the Reploids to reign over mankind (akin to Magneto) before he became obsessed with the defeat of the heroes.
  • My Death Is Only The Beginning: As is well-known, destroying Sigma the Reploid only succeeded in unleashing Sigma the virus. This would occur again in X8, where even as he seemed to be dealt his Final Death, he let slip the little nugget of information that he'd imprinted his personal data in the production of all Next Generation Reploids, effectively creating hundreds of Sigmas who would carry on his will whether they realized it or not.
  • Neck Lift: In The Day of Sigma OVA, he does this twice, to Zero and then X. Also, during the boss fight with him in X8, he'll do this with one of your characters until you call for help.
  • Nice Job Breaking It, Hero!:
    • Begun with the very first game, at that. Downplayed in that Sigma was by and large the single most powerful reploid in existence at the time, he had to be stopped and X was the only one who could do it, but destroying Sigma's body unwittingly just set him free, unleashing him in his true form, whereupon he understood just what he now was and what was well within his power to achieve.
    • The first part of the Evil Plan in X5, where Sigma baits X and Zero into fighting and defeating him at the beginning of the game, spreading The Virus all over the earth. One should know that it's a trap, since your Arch-Enemy wouldn't have let himself get beaten that easily.
    • In a bizarre twist earlier in the series, Sigma's battle with Zero pre-X. Sigma's actually The Hero in this scenario, and the whole battle (possibly when Sigma punches Zero's helmet crystal) was the cause of The Virus passing onto him, triggering his Face–Heel Turn and, in turn, Zero's Heel–Face Turn. Although, it could be that Sigma as a Maverick would be preferable to Zero remaining a Maverick.
  • Nice Job Fixing It, Villain!: Happens twice with Zero — one detailed in "Nice Job Breaking It, Hero!" above, and another when he had the X-Hunters rebuild Zero after he was destroyed in the first game.
    • Sigma debatably does it a third time with Zero in X5. Interested in Zero's potential thanks to the information imparted to him by Wily about Zero's origins, Sigma spends his time trying to re-awaken Zero's Maverick programming and turn him against X instead of outright killing either of them from the beginning. X and Zero do end up clashing due to mistrust caused by Zero's connection to the Sigma Virus, but Sigma underestimates the strength of their bond, with Zero going on to protect X from Sigma's sneak attack and deliver the final blow to Sigma.
    • To a lesser extent, he does this to X in the OVA. After he taunts X by strangling Zero in front of him to make him a Reploid-shield and telling X to try to shoot him (knowing that X would hesitate), then gored Zero and throw him away, and then gored X himself, X goes into a brief shutdown... but then snaps, and claws Sigma with his glowing hand, causing the trademark scars. It also triggered X's Character Development.
  • Ninja Pirate Zombie Robot: His One-Winged Angel in X1 is a wolf robot (and technically zombie too), while his first form in X4 is a Grim Reaper robot. In X6, one of his forms is a robot zombie.
  • No-Holds-Barred Beatdown: On the receiving end of this trope back when he was still the Commander of the Maverick Hunters, courtesy of Zero.
  • Omnicidal Maniac: As his sanity withers away and his grudge against the heroes grows, his plans become more destructive and extreme. He goes from wanting to create a world for Reploids (X1), to taking over the world (X3), to simply destroying it outright (X4X8).
  • One-Winged Angel: He's quite fond of this trope. And he's also an idiot at this trope. According to the sourcebooks, none of the fortress bosses from the first game were working right, and his battle body wasn't finished. In X3, aside from just barely finishing the Kaiser body before starting the war, he didn't use it in a place where he could use the speed. In X5, he even says his giant body isn't finished. Finally, in X7, he never bothers to just smash the platforms you're on.
  • The Paragon Always Rebels: He was a honorable commander of Maverick Hunters before he became a Maverick leader, as revealed in X4.
  • Playing with Fire: His final form in X1 and his first form in X3 both have fire based attacks. His final phase in X4 has three robotic heads with the elements of fire, ice and lightning.
  • The Power of Hate: Somewhere along the way, Sigma's continued thwarting by the Maverick Hunters began to strike a sour note, though Sigma usually manages to hide it well. He revels in the fact that, prior to X5, he met an interesting character (i.e. Wily) who hated X as much as he did, and his zombie form in X6 does little more than howl in remembrance of his hatred for X and Zero.
  • Pragmatic Villainy: Disapproves of Berkana's actions from Xtreme 2, because she acted for her own gain (rather than his).
  • The Professor: He uses this title as an alias in X7.
  • Properly Paranoid: When trying to convince General to go maverick, he explains that humanity intends to destroy any Reploid that doesn't obey them perfectly. Come the Zero series, and especially with the character of Dr. Weil, and it shows that Sigma was pretty much spot on with his assessment. Ironically, this was probably due to Reploids constantly rebelling at the slightest provocation. Often due to viruses. Which he spread.
  • Punch! Punch! Punch! Uh Oh...: In a flashback scene in X4, Sigma fights Zero and seems to be getting the upper hand, until Zero cuts off Sigma's arm before beating him into a pulp. Sigma only wins when Zero's head crystal suddenly glows and gives him a headache, allowing Sigma to knock out Zero with a punch.
  • Rage Quit: His entire plan in X8 is him relocating himself and New Gen Reploids to the moon, due to the earth being torn apart after so many prolonged wars, and then he's going to demolish the earth outright to start anew.
  • Right-Hand Attack Dog: At the end of X1, he sics his robot pet Velguarder on X before confronting him personally.
  • Sadist: Has some shades of this when taunting Zero about Iris' death.
  • Sanity Slippage: With each subsequent game and each subsequent resurrection, Sigma's sanity began to gradually erode. Over the course of the series, he goes from a charismatic, sophisticated Diabolical Mastermind to little more than a brutish thug driven only by his hatred for the heroes, but retaining enough of his intelligence to be extremely dangerous.
  • Scars Are Forever: No matter what body he uses, the trademark scars over his eyes are left intact, though how he obtained them varies between continuities: a flashback in X4 attributes the scars to battle damage inflicted by Maverick Zero during what quickly became a No-Holds-Barred Beatdown, while the The Day of Σ shows X scratching Sigma over the eyes with a Shining Finger-like attack (although it's still possible the former preceded the latter in the MHX canon if Sigma were to have repaired himself between events). Even when he gets entirely new bodies with new heads, he always retains these scars as a sort of trademark.
  • Secondary Color Nemesis: Best seen in official artwork, but his standard outfit consists of a green body armor with purple sleeves and pants.
  • Self-Fulfilling Prophecy: Sigma predicts that humanity will scrap any Reploid that doesn't obey them perfectly so he launches numerous genocidal campaigns against the humans. Even if Sigma might be right, as shown in the Zero series, what he did definitely contributes to his prediction.
  • Shock and Awe: His final form in X1 and his first form in X2 both make use of thunder-based attacks. In X4, one of his final phase's moves involves three heads with the powers of fire, ice and lightning.
  • Shotguns Are Just Better: His main weapon in X7 is a double-barreled shotgun.
  • Signature Laugh: "Hee Hee Hee!"
  • Sinister Scythe: Trades in his trademark Laser Blade for one of these in X4 to go with his overall Grim Reaper motif.
  • Slasher Smile: He seems to always have a manic grin on his face.
  • Slouch of Villainy: He does this in X8.
  • Spanner in the Works: Unwittingly defeats Wily's plan to have Zero wreck havoc on the world, in the process setting up Zero's Heel–Face Turn. However, it also leads to Sigma's own turn. In X5, it's implied that Wily (whose somehow still around) uses this to his advantage and upgrades Sigma instead)
  • Spikes of Villainy: Added these to his armor after his Face–Heel Turn. They frequently adorn his armor in his later incarnations.
  • Super Prototype: Although X is the original, Sigma was the very first Reploid constructed by Dr. Cain, which possessed limitless strength and intellect.
  • Taking You with Me: He tries to take both Zero and X down with him in X5 before Zero fires one last shot, completely destroying him. Sigma half-succeeded; he did mortally wound X, but X is then repaired by Dr. Light afterwards.
  • Throwing Your Shield Always Works: Sigma in X3 throws his shield like a boomerang once his health gets low enough.
  • Took a Level in Dumbass: In X6, to the point where he speaks in broken dialogue, and in X8, where he's being used by Lumine.
  • Typhoid Mary: At some point Sigma bonds with the Maverick virus and becomes a living virus himself. He even exploits this in X5, sacrificing one of his bodies in order to infect the entire world.
  • Unwitting Pawn: If Lumine's words are to be believed, Sigma was actually being used by Lumine in X8, particularly with the plan to migrate to the moon using the Jakob Orbital Elevator. Played with in that it's confusing about who's using who; while Lumine might be right, he still has Sigma's DNA put into his Copy Chip, and thus possesses Sigma's will and plans; basically Lumine keeps furthering Sigma's plan, even if he still retains his individuality, including making Sigma his pawn.
  • Villain Decay: Invoked. After Sigma truly died in X5, his botched resurrection by Gate led to Sigma steadily losing his own villainy more and more. By the time X8 rolls around, he's completely abandoned his own mission and decides to just wipe out the Earth and start his own society on the moon, a plan so rife with holes that you know all ability to rationalize has left him.
    • It doesn't go unnoticed, either. Starting with X6, X and Zero no longer regard Sigma as any kind of Worthy Opponent, and only seem to consider him a threat from little beyond his destructive potential if left to his own devices.
  • Villain Opening Scene: In the opening cutscene of X's X4 story, a cloaked Sigma is having a discussion with the General about the Maverick Hunters, trying to convince him to fight against and destroy them.
  • The Virus/Contagious A.I.: His true form, after the Maverick Virus from Zero's Capsule merged with him. According to Mega Man Zero Official Complete Works the true form of the Sigma Virus is the Suffering Circuit (it implies that Dr. Wily has stolen the data of said circuit from Dr. Light), which gives X and all the Reploids the ability to decide right and wrong for themselves; the virus corrupted both his DNA and said Suffering Circuit, creating a new virus strand that is alive with his consciousness.
  • Weakened by the Light: In X8, his real body is weak against Optic Sunflower's light-based weapons. Definitely symbolic.
  • Weaksauce Weakness: His One-Winged Angel forms tend to suffer this in one way or another. Worst possible contender? Splash Laser, a literal Bubble Gun.
  • Weak to Fire: His cloaked reaper form in X4 can only be harmed by the fire-based weapons obtained from Magma Dragoon, nothing else will harm him. A Logical Weakness considering that his cloak burns and catches on fire when he's hit by fire weapons.
  • Well-Intentioned Extremist: He started off as this in the first game, where he wanted to remove humans from the equation out of a genuine desire to allow Reploids to grow and evolve while realizing their true potential before devolving into a murderous lunatic in the later games.
  • Wolverine Claws: Uses Laser Blade variants as his Weapon of Choice for X2 and Xtreme 2.
  • Worthy Opponent: Though both the main protagonists would be loathe to admit it, the one thing about Sigma nobody dared to ever underestimate of the Maverick commander in the main pentalogy was his raw power and combat skill, and he is perhaps the only character to consistently be a match for X and Zero. Even as far as X8, his form is acknowledged as more or less the the most sturdy and powerful form a New Gen Reploid could take to avoid harm.
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    Vile (VAVA) 
https://static.tvtropes.org/pmwiki/pub/images/mmx_-_vile_7807.jpg
Voiced by: note 
A former Maverick Hunter who was detained for use of excessive force, released by Sigma to act as his second in command during the events of X1 (although Vile instead decides to take on both X and Sigma in Maverick Hunter X). He is revived by Dr. Doppler as "Vile MK-II" in X3 in order to defeat X. After a long absence from the series, he returns in X8 to kidnap Lumine. He can be distinguished by his use of Ride Armor, his shoulder cannon, and his Boba Fett-esque helmet.
  • And Then What?: The fatal flaw of Vile in his story mode of Maverick Hunter X. Upon being told by Sigma that X is undoubtedly the one who holds the key to deciding the world's future, the resentful Vile refuses to accept this, and pushes that he will be the one who will change the world... Except, Vile himself has no clue what he'd actually DO with such a thing, acting on spite alone without any greater cause. Sigma himself easily susses this, point-blank asking Vile what he'd have done if he'd made it to him, whereupon Vile can only laugh and admit he wasn't sure himself.
  • Another Side, Another Story: Vile Mode in Maverick Hunter X, featuring him as a Villain Protagonist, going against Sigma's forces because he wants to show Sigma that he's the better Reploid than X.
  • Anti-Air: In Vile Mode, his Shoulder Cannon is suited for attacking enemies above him. Also, while leg weapons are usually designated air-to-ground weapons, they can be anti-airs too with certain weapons such as the Splash Hit napalm (creates a vertical tornado), Peace Out Roller and Stubborn Crawler ball (can roll up the wall), Hot Icicle ball (aims for the ceiling), and Burning Drive flamethrower (flame burst that hits around him).
  • Arm Cannon: Only in Vile Mode, or the boss fight against him in the remake. It can either be a vulcan, a missile launcher, or a Rocket Punch.
  • Ax-Crazy: Maverick Hunter X shows him as an extremely unstable and violent Maverick, with a very short temper and tendency to get into fights with no reason. At the final cutscene in his story mode, he brutally beats up X while laughing.
  • Back from the Dead: In X3, where he was revived by Doppler, and in X8, when he just inexplicably appears.
  • Back for the Finale: Basically the whole reason for his presence in X8; played more literally in Sigma Palace.
  • Backpack Cannon: In Maverick Hunter X and X8, his cannon is mounted onto his backpack instead of his right shoulder. And in Vile Mode, it can alternatively fire lasers or cutters.
  • Badass Boast: In X1:
    Vile: You worthless piece of scrap metal, did you think you could defeat me?
  • Berserk Button: At least in Maverick Hunter X, mentioning X or his potential will make him deeply violent. Not that it's hard to set him off in the first place, but still.
  • Bonus Boss: In X3, he's an optional boss you can encounter in the 8 Maverick stages. Depending on whether you defeat him with his weakness or not, you may or may not encounter him in the final stages. In X8, whenever you enter the Multi-Mook Melee rooms, there's a chance that he'll appear instead of those mooks as a Mini-Boss; he's still fought like a normal boss in the final stages later.
  • Boomerang Comeback: In Vile Mode, the cutters shot by Metal Crescent and Quick Homesick will return to Vile if they're not destroyed. The latter can also bring items back to him.
  • Brought to You by the Letter "S": the first game had the Maverick insignia on his helmet, while the third was Dr. Doppler's, and X8 has none. Maverick Hunter X, on the other hand, replaced both symbols with his own letter "V".
  • The Cameo: Yes, he also appears in Tatsunoko vs. Capcom, but not in Zero's ending like all the other aforementioned cameos... Instead, he showed up in the PTX-40A pilot's ending.
    • He also appears in Mega Man Zero 2 as a summoned illusion in one of Phoenix Magnion's attacks.
  • Cold Flames: In Vile Mode, one of his flamethrower weapons, Sea Dragon's Rage, is a special flamethrower that shoots blue flame... that freezes enemies instead of burning them. It's the only flamethrower that can be used underwater.
  • Cyber Cyclops: In his Mega Man X3 artwork, the Rockman X3 manga, and Ruby-Spears Mega Man cartoon.
  • Death of a Thousand Cuts: In Vile Mode, this is how his vulcans work (with the exception of Distance Needler, with less rapid fire but more damage each shot), as well as the vulcan of his Ride Armor. His Longshot Gizmo cannon also rapidly fires multiple blasts. His Straight Nightmare laser, Marooned Tomahawk cutter, Splash Hit and Bang Away Bomb napalms, Stubborn Crawler ball weapon and all of his flamethrowers (except for Burning Drive) also deal multiple hits per shot.
  • Deflector Shields: In Vile Mode, in a variant, his Territorial Pow napalm releases spheres of energy when it explodes, that will block enemy shots.
  • Difficult, but Awesome: In Vile Mode he starts with even less health than X, has no dash upgrade, and can only bring three weapons into a stage at a time, but those three weapons are all hotkeyed and provide him plenty of options for firing upward and downward. His weapons also have rapidly regenerating ammo, and his shoulder and leg weapons can be spammed in mid-air to hang in the air and perform an odd pseudo-gliding maneuver much like the Magma Blade glitch. Finally, every stage has Vile's signature Ride Armor somewhere in it, though it runs on a timer and eventually breaks down.
  • Do Not Run with a Gun: In Vile Mode, he'll abruptly stop (even in midair) when he fires his shoulder and leg weapons.
  • Don't You Dare Pity Me!: When Armored Armadillo says that he pities Vile's lack of respect for authority and refusal to follow orders, Vile furiously bites back that Armadillo knows nothing about him, so he can save his pity.
  • The Dragon: Lampshaded by Zero:
    Vile: Don't you ever get tired of the whole "justice" thing?
    Zero: Don't you ever get tired of being Sigma's lapdog?
  • Expy: Yes, his character design is based on Boba Fett. Why do you ask? Becomes even more obvious in X8 where his armor is the same color as Fett's. Also, he has more in common with Bass, being The Rival of their era's Mega Man who even rebel against their superiors because of it.
  • The Faceless: One wonders if there is a face underneath that helmet at all...
  • Final Boss Preview: the first game had him attack you in a Mini-Mecha at the end of the first level. You could with some skill get into a pattern of dodging his paralyzing shot and returning fire, but the game won't continue until you get hit by it and force Zero to come help you. You can also accidentally die by touching him while low on health.
  • Generic Doomsday Villain: In the original version, Vile was both a scripted obstacle to be overcome and henchman to Sigma with an interesting design. The remake, Maverick Hunter X, tries to rectify this a childish rivalry/jealousy with X, as well as state that Vile's insubordination/Maverick tendencies stem from a defect in his suffering circuit, which allows him to follow any order he chooses. It stays true to his appearance in Project X Zone.
  • A Glass in the Hand: Vile, or rather, VAVA, did this to a glass of liquid in the manga adaptation, as a demonstration of how it matters little to him as to what's in the drink to X (he comments that Reploids can't tell the difference between bourbon or mud in a glass). Such was even given a Mythology Gag with his upcoming D-Arts action figure, where it shows him with a glass of bourbon and even comes with it.
  • Green-Eyed Monster: Maverick Hunter X implies that he is highly jealous of Sigma's interest in X as potentially being the most powerful Reploid. He sets out to destroy X in order to prove himself superior.
  • Ground Wave: In Vile Mode, his Sword Bouquet ball weapon is a ball of flame that creates a wave of flames on the ground. Inverted with Hot Icicle ball weapon, which is similar to Sword Bouquet but runs on the ceiling.
  • Heads I Win, Tails You Lose: Maverick Hunter X features this as the Final Boss battle if you play as Vile. Beat X and Zero, and the following cutscene shows them seriously damaged. Then they pull themselves together, stomp you with one shot, and leave you to die. Great reward.
    • When you play as X, the intro-stage battle with Vile has been changed from a Hopeless Boss Fight to one of these. You have to do a certain amount of damage, but then Vile will simply waste you; Zero's entrance then proceeds on schedule.
  • Hero Killer: In the first game. Even with all the upgrades, you can't beat him while he's in his Ride Armor, and he even manages to beat Zero, who performs a Heroic Sacrifice just to destroy his Ride Armor and give X a fighting chance.
  • Homing Projectile: His Infinity Gig Rocket Punch can home in enemies, hitting them multiple times until they're destroyed.
  • Hopeless Boss Fight: The iconic intro boss fight with him in X1 is this. Again in Sigma's Fortress, before Zero destroys his Ride Armor.
  • Iconic Item: His shoulder cannon. His helmet might also count, although it's already iconic to someone else. On that note, in X8, his the color of his armor/helmet is changed from purple to green, and he uses a jetpack during his encounters with the heroes.
  • Informed Ability: His combat process in the original game. Outside of the Ride Armor, which the player can't damage, his abilities are woefully unimpressive.
  • Jerkass: Especially in Maverick Hunter X-
    Vile: Rebellion? I couldn't care less. I just hate you, that's all!
  • Kick Them While They Are Down: Happens at the end of Vile Mode, to X. Also at the intro stage of his mode, after you beat X, where he shoots the grounded X twice before Zero rescues him.
  • Laughing Mad: His reaction right after killing off his enemies, and in X8 hard mode, the last thing heard from him before his offscreen demise.
  • Large Ham: In Maverick Hunter X. Sigma can at least restrain himself in a normal conversation, but every bit of Vile's dialogue barely contains his pride and anger.
  • Leg Cannon: One of his moves (both as a boss and as playable) involve shooting bombs, balls or fire from his knees.
  • Mini-Mecha: It just wouldn't be Vile without his Ride Armor.
    • The one from X1 is an unnamed one which is indestructible to X, whereas Zero shot off its arm in the opening stage and then fully destroyed it in the first Sigma stage.
    • In the secret level of X3, he rides a modified version of the Kangaroo Ride Armor. Should you fight him in the second Dr. Doppler stage, he has a brand new one called "Goliath".
    • In X8 he comes with the Devil Bear Ride Armor, and he operates it through a remote link.
  • Names to Run Away from Really Fast: Thanks to a possible Woolseyism.
  • Nominal Hero: Back when he was still a Maverick Hunter. Oh sure, he could hunt them down with the best of them...it's just that not only was he more interested in killing Mavericks than actually saving civilians, he couldn't care less how much property he destroyed or if any civilians got caught in the crossfire of his hunts.
  • One Bullet at a Time: In Vile Mode, he can only fire his Rocket Punch, shoulder weapons (except for Straight Nightmare and Marooned Tomahawk) and flamethrower one at a time.
  • One-Hit Polykill: In Vile Mode, his Distance Needler vulcan, Egoistic Pill and Infinity Gig rocket punches, his laser weapons (except for Cerberus Phantom and Necro Burst), his cutter weapons (except for Metal Crescent), his ball weapons (except for Deadstar Hug) and his flamethrowers (except for Burning Drive) can pierce through multiple enemies.
  • The Only One Allowed to Defeat You: In Maverick Hunter X, his motivation is changed into him trying to prove his superiority over X to everyone. In Vile Mode, that includes the baddies themselves.
  • The Paralyzer: In X1, he shoots a sphere of energy that paralyzes X to capture him. He also uses this move when fought for real at Sigma's Fortress.
  • Person of Mass Destruction: Vile is a walking arsenal, easily the most heavily-armed foe X has ever had to contend with; he made it to rank SA on his power alone —it certainly wasn't for his professional conduct— on the same echelon as Zero, and he can readily spread the mass-annihilation to prove it.
  • Promoted to Playable: In Maverick Hunter X, Vile Mode is available after you beat the story as X.
  • Rapid-Fire Fisticuffs: In Vile Mode, his Spoiled Brat rocket punch is weak, but fires the fastest out of his rocket punches, allowing for multiple punches in a second.
  • Reploid Popsicle: In X8, he's weak to Avalanche Yeti's weapons; he'll freeze if he's hit by those weapons.
  • The Rival: Played up in the retelling of Maverick Hunter X, whereupon it was established he was this in more of a "bully"-situation-gone-nuclear sort of way to X.
  • Rocket Punch: He can acquire these in Maverick Hunter X.
  • Sensual Spandex: Strangely evoked in Maverick Hunter X. When he's on foot his butt is clearly visible through his spandex.
  • Shock and Awe: His desperation attack in X8.
  • Shoulder Cannon: In X1 and X3, his cannon is mounted onto his right shoulder.
  • Shout-Out: To Boba Fett (see the Iconic Item input above). The fact that the Japanese use "V" and "B" interchangably means that his original name could be translated as BABA kind of puts the icing on the cake.
  • Sociopathic Soldier: Due to an irreparable circuit in Vile's brain, Vile has a rather... disturbing way of dealing with Mavericks (he seems to not only intensely love destroying Mavericks, but also causing as much damage as possible, leading him to harm civilians and even fellow Hunters), which was one of the reasons why he ended up branded a Maverick and placed in the brig before Sigma released him for his revolt.
  • Sphere of Destruction: In Vile Mode, his Necro Burst laser weapon isn't an actual laser; rather, it's a quick, powerful burst of energy from his cannon that decimates enemies in a radius around him. It's powerful enough to (almost) kill the mini-boss in the opening stage in one hit.
  • Spread Shot: In X8 he can fire multiple cannon blasts in a spray burst fashion.
    • In Vile Mode, his Buckshot Dance and Triple 7 vulcans also fire in a spray burst fashion, as does Metal Crescent cutter and Trident Line cannon.
    • His Cerberus Phantom laser weapon fires 3 lasers in a fan-out fashion, as does Two-Headed Slash (2 cutters).
    • A number of his weapons are of the "exploding shot" variety, such as all of his Napalm weapons (obviously), the Popcorn Demon missile (the missiles split into 3 after flying a short range), Fire Murrain cannon (spreads its explosions after destroying enemies), and Peace Out Roller ball weapon (splits into 2 balls after touching a surface).
  • The Starscream: Decidedly this, at least in Maverick Hunter X.
  • Technicolor Fire: In Vile Mode, his flamethrower weapons (aside from his default one, Wild Horse Kick, with natural fire color) throw out differently-colored flames. His Sword Bouquet and Hot Icicle ball weapons also use pinkish and blue fire respectively.
  • Tornado Move: In Vile Mode, his Straight Nightmare laser fires a horizontal cyclone similar to X's Storm Tornado that goes slowly forward and hits multiple times. His Splash Hit napalm creates a vertical tornado upon exploding that also hits multiple times, based on Launch Octopus' whirlpool move.
  • Unexplained Recovery: Unlike Sigma who's got the excuse of being a computer virus, Vile has no explanation for how he's been able to survive exploding so many times.
  • Villain Decay: His first appearance portrays him as an undefeatable Hero Killer that walks all over X, manages to incapacitate even Zero, and forces a Heroic Sacrifice from the latter just to destroy his Ride Armor and give X a fighting chance. He's still fairly tough in later appearances, but never manages to attain that level of sheer badass again. Even Mega Man: Maverick Hunter X retcons away Vile's undefeatable status from the first game, removing all the Hopeless Boss Fights against him (the first fight is beatable, and second skips right past the Ride Armor section of the fight,) and making it that even in his Ride Armor, the only way he can get the upper hand on X is via ambushes and cheap shots and his own campaign ends with him getting beaten by X and Zero without ever getting a chance to face off against Sigma.
  • Voice of the Legion: The Japanese version of X8 gives Vile a hellish reverb to disguise Mugihito's voice, giving a terrifying raspy voice worthy of Death himself. The dub does not reflect this, however.
  • Wave Motion Gun: In Vile Mode, his Rising Specter laser is one large continuous purple laser. It can only be aimed upward at 45 degrees angle unlike other shoulder weapons. Downplayed with his other laser weapon Nervous Ghost, which is similar but green, weaker, narrower and aimable.
  • Wild Card: Even as far back as X3. Although his bio in the original game implies that he was always a wild card (something about being rebellious towards his superiors).
    • Lampshaded by himself in Maverick Hunter X's Vile Mode, in the intro stage:
      Vile: Sigma... I may be the wildcard you hadn't counted on!
  • Wreathed in Flames: In Vile Mode, his Burning Drive flamethrower isn't a normal flamethrower - it instead creates a quick burst of flame around his body that heavily damages all around him.
  • Writing Around Trademarks: The reason for his Dub Name Change.

The X-Hunters (Counter Hunters)

    In General 
https://static.tvtropes.org/pmwiki/pub/images/x_hunters.jpg
A trio of Mavericks who have dedicated themselves to defeating X. and main antagonists in Mega Man X2. In X2, they challenge X to one-on-one fights; with Zero's rebuilt body as the bait. The members are Agile, Serges (Sagesse), and Violen.
  • BigBadTriumvirate: Of Mega Man X2.
  • Big, Thin, Short Trio: Violen is the big one, Agile is the thin one and Serges is the short one.
  • Bonus Boss: A variant: They can be optionally encountered in the 8 stages and defeating each of them gives you parts of Zero's body. Whether you did that or not, though, you will encounter them (again) in the final stages.
  • The Cameo: They all appear in X3 and X5's openings. Agile also appears as one of Phoenix Magnion's summoned illusions from Mega Man Zero 2.
  • Disc-One Final Boss: At first there is no sign of Sigma.
  • Decomposite Character: They're based on three original designs for Sigma from X1, which were combined to create the final version seen in the game. Violen has his size and strength, Agile has his Laser Blade and height, and Serges has his cape.
  • Meaningful Name: All three - Agile and Violen are obvious; Serges' original name, "Sagesse", is french for "wisdom", apt for a Mad Scientist.
  • Quirky Miniboss Squad
  • The Remnant: They (along with their eight Mavericks) were part of the original rebellion six months prior.
  • Sinister Silhouettes: Their first appearance.
  • Terrible Trio: They are trying to revive Sigma.
  • Theme Naming: The names were originally French words: Agile (translating to Agile), Violent (the ending 'T' is silent), and Sagesse, French for Wisdom.
  • Wrong Name Outburst: When the X-Hunters issue their challenge to X in the Japanese version, Serges begins his message with "Rock" before apparently correcting himself to say X. This would suggest he mistook X for the original Mega Man...

    Violen 
https://static.tvtropes.org/pmwiki/pub/images/mmx_violen.png
He is the enforcer and the strongest of the group.

    Serges (Sagesse) 
https://static.tvtropes.org/pmwiki/pub/images/mmx_serges.png
He is the scientist and the smartest of the group.
  • Back from the Dead: The Japanese script heavily implies that Serges is a robotic form of Dr. Wily. This is hinted through his dialogue with X, calling him "Rock" and the "last memento of Dr. Light".
  • Jack-of-All-Stats: His power and speednote  are relatively balanced compared to Agilenote  and Violen note . It denotes his status as the smartest of the three.
  • Something Only They Would Say: Serges in the Japanese version. After being beaten, Serges says that he regrets being defeated by "the robotic memento of Light". This and the Wrong Name Outburst below suggests that he somehow knew Rock and Light, which point to Serges being Wily.
  • This Cannot Be!: What Serges says after getting defeated the second time...in the American version.
  • Wrong Name Outburst: In the original Japanese script, Serges has a momentary slip and refers to X as "Rock". As in DLN-001 Rock, the original Mega Man.
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    Agile 
https://static.tvtropes.org/pmwiki/pub/images/mmx_agile.png
He is the strategist and the fastest of the group.
  • Affably Evil: In the Japanese version, Agile has an exceedingly polite manner of speech.
  • Laser Blade: Agile's weapon; it can even fire out Sword Beams.
  • One-Winged Angel: Agile's rematch fight has him as a powerful, but goofy looking spaceship as opposed to the cool android he initially appeared as. One wonders if he could change back.
    • Clipped-Wing Angel: In his normal form, his sword can block shots and he has good range of movement. In his rematch, he's a big, slow target, possibly for the Shoryuken not far from his room.
  • The Strategist: Agile's function in the group.

The Doppler Army

    Dr. Doppler 
https://static.tvtropes.org/pmwiki/pub/images/mmx_-_doppler_6884.jpg
A Reploid scientist specializing in the field of computer viruses and one of the main antagonists in Mega Man X3. Prior to X3, he made an amazing discovery: Sigma was actually a virus that caused Reploids to turn maverick. He developed an anti-virus that cured many mavericks and they formed a city called Doppletown around his lab. However, it turned out to be a placebo: Doppler himself was infected and had just formed a maverick army under the Hunters' very noses. After he is defeated by X, the virus leaves him and he reveals that not only has he revived Sigma; he had also built a massive battle body for him. Depending on whether Zero survives the game, either Zero gets Doppler to install the real Virus program into his saber, or Doppler installs it into himself in order to save X from Sigma's Viral form. One ending clearly shows him destroyed along with his lab, but the "better" ending leaves his survival ambiguous.

The Nightmare Police

    In General 
Made up of the fast Bit (Vajurilla FF) and the strong Byte (Mandarilla BB), the Nightmare Police were the law of Doppletown before Doppler's rebellion. They can combine to make the powerful Godkarmachine O Inary.
  • Bonus Boss: Like the X-Hunters, they (and Vile Mk. II) can be optionally encountered in the 8 stages. If you defeat them normally, they'll still appear in the final stages; defeat them with their weaknesses, however, and they'll be replaced by other bosses in the final stages.
  • Combining Mecha / Fusion Dance / One-Winged Angel: As Godkarmachine O Inary.
  • Lawman Gone Bad: Like Dr. Doppler, they're infected by Sigma Virus.
  • Meaningful Name: Their English names are at least. The small one is named Bit while the big one is named Byte. A bit is a small unit of computer data while a byte is a larger unit of data.

     Bit 
https://static.tvtropes.org/pmwiki/pub/images/mmx_bit.png
Bit is the faster of two.
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     Byte 
https://static.tvtropes.org/pmwiki/pub/images/mmx_byte.png
Byte is the stronger of the two.
  • Friendly Enemy: What little characterization he gets paints Byte as one of these.
  • Good Old Fisticuffs: Byte's only attack. And it does obscene damage, to boot.
  • Graceful Loser: If X defeats him with his weakness, he expresses surprise that he lost, but congratulates X on his victory.
  • Lightning Bruiser: Byte is damned fast for such a big guy.

The Repliforce

    In General 
Repliforce is a military group formed by Dr. Cain as support for the Maverick Hunters due to the increase in Maverick incidents. They are lead by The General along with his second in command; The Colonel. During X4, they are framed by Sigma for the fall of the floating city Sky Lagoon, and refuse to give up their honor by disarming to the Maverick Hunters. This causes them to be labeled Maverick and they decide to hold a military coup and flee to the space station Final Weapon.
  • Be as Unhelpful as Possible: They inadvertently started a war because they refused to disarm and come in for questioning when their troops and equipment were found at the scene of an atrocity. Even if Colonel believed that Repliforce was going to be unfairly treated, the least he could do was mention it.
    • This is taken to Good Is Dumb heights in the X4 manga, though mostly because all of the Repliforce commanders that actually get page time are borderline psychotic, barring General, Colonel and perhaps Jet Stingren/Jet Stingray (Ironic, given that Jet Stingray is probably Repliforce's biggest war criminal that wasn't on Sigma's payroll).
  • Bling of War: General especially, but Colonel is no slouch either.
  • Commissar Cap: Colonel wears one. General wears a golden one.
  • Everyone Calls Them Colonel and General: Although being reploids built for war, these are probably their actual names.
  • Frame-Up: They were a victim of this - they were suspected by the Maverick Hunters for causing the Sky Lagoon to fall. Unfortunately, when X and Zero tried to resolve this peacefully (by asking him to drop their weapon and come for questioning), Colonel is less than cooperative. X only knew this after he fought Magma Dragoon, the true perpetrator of the fall.
  • Kill Sat: Their Final Weapon.
  • Knight of Cerebus: They effectively kickstarted the themes of how the term "Maverick" can be abused to truly horrific levels note , as well as giving us a firsthand look at the tensions between Reploids and Humans, both of these themes playing a major role in future X games as well as being the main theme of the Zero series.
  • Lawman Gone Bad: The organization was made to compensate for the failure of Sigma and Dr. Doppler, conduct further Reploid research and development, and to support Maverick Hunters on, well, fighting Mavericks. However, following more Maverick attacks, they're seen as ineffective and potentially dangerous; by the time of X4, they don't exactly "go bad" (their intention was to establish their own nation for their own security in space after being accused for a major atrocity) but the Maverick Hunters can't help but see them as having done so (it's essentially a coup d'etat, and Colonel himself refuses to cooperate).
  • Not Helping Your Case: The Repliforce as a whole, and Colonel in particular. See "Right for the Wrong Reasons" below. Worse, while they claim their exiling to be peaceful, the same cannot be said to Jet Stingray and Storm Owl attacking the populace to serve as distractions.
  • New Era Speech/Rousing Speech: Colonel and General deliver this to Repliforce. While General's speech is more of the former, Colonel's speech following General's is more of the latter.
    General: Brave soldiers of Repliforce, we have all been wrongfully judged as Mavericks by the humans. We cannot suffer this indignity and live in disgrace. We will build our own nation of Reploids. But remember, this is neither about insurrection, or rebellion against our human creators. This is about our liberty and security. We must battle for our own individual rights, and our own survival. Together we will build our own nation, a sanctuary for all Reploids, our own Utopia. Let us forge onward towards a new golden era for the Repliforce.
    Colonel: I, too, share the General's sentiment. Take heed, we have no other choice. Let us fight vehemently, with courage and pride, without fear—for we are the Repliforce. The most powerful army in history!
  • Redemption Equals Death: Particularly General, see Heroic Sacrifice above.
  • The Remnant: The Skiver/Spiral Pegacion and Mattrex/Burn Dinorex in X5, and Red in X7.
  • Right for the Wrong Reasons: Repliforce was definitely guilty, but not because of them plummeting the Sky Lagoon to the Earth's surface (see Frame-Up above) as the human government deem them as, but because they went against orders (they refused to strip down their arms for interrogation) and then tried to flee to the outer space. And yes, disobeying orders from the government is bad if you're a military and the orders aren't criminal.
  • Robot Republic: They were initially aiming for this, peacefully exiling themselves into space. Too bad about the "stripping down their weapons" part, and Jet Stingray's and Storm Owl's attacks on civilian populations to serve as distractions.
  • Unwitting Pawn: to Sigma, pretty much.
  • Who Names Their Kid "Dude"?: General and Colonel are not just their ranks, these are actually their names. It turns into creepy foreshadowing when one realizes that whoever built them had absolutely nothing in mind for them but their jobs in Repliforce, so when those jobs were threatened in any way…

     The Colonel 
https://static.tvtropes.org/pmwiki/pub/images/xv_colonel.png
Voiced by: note 
Second-in-command of the Repliforce
  • Evil Brit: At least in the English dub. Although his accent also has twangs of Australian to it.
  • Expy: He gets one in the form of Colonel.EXE in Mega Man Battle Network.
  • Half the Man He Used to Be: He gets bisected in the X4 manga.
  • Honor Before Reason: The reason the whole war really starts? Because Colonel refuses to cooperate and disarm himself... because (along with the accusation in the first place) he believes the honor of the Repliforce has been hurt. He even states that he doesn't care if he's branded Maverick and that he prefers war over dishonor and shame. Justified, however, in that (due to his and Iris' origins) he lacks the compassion and pacifism that Iris has, and hence the lack of peaceful reasoning capability. This fault basically forced General to declare independence for Repliforce and, well, start the whole conflict in the first place.
    • A particular moment for Colonel from X4's manga adaptation: in Colonel's first duel with Zero, Iris intervenes by threatening to commit suicide if they don't stop fighting, prompting Zero to stand down. Colonel still tries to attack before relenting. Later it's revealed that damage to one sibling has similar effects on the other because of their unique bond; Iris's threat extended to Colonel as well.
  • Pre Ass Kicking One Liner: When you fight him.
    I've been waiting to fight with you.
    I'll show you no mercy. Now get ready!
  • The Rival: To Zero. It shows in the Spaceport fight as some of Colonel's attacks are similar to moves that Zero uses when he's a boss, see Stab the Sky and Sword Beam. It's also implied that he and Zero (as well as X) used to be well-acquainted with each other before the whole conflict starts.
  • Shock and Awe: On one of his attacks. See the Stab the Sky below.
  • Stab the Sky: One his attacks involves him doing this, getting the saber struck by lightning in the process, and then doing a Sword Plant to spread the electricity to the ground.
  • Sword Beam: His signature attack, he slashes three times, launching an energy wave with each slash. He also has a variant after he Turns Red (only in the Space Port battle) where he jumps and then smashes the ground with his saber, creating a Ground Wave that grows big the further it goes.
  • Sword Pointing: He does this to X in the flashback in X's ending (at 0:16)
  • Teleport Spam: He repeatedly disappears and then reappears next to Zero/X, trying to slash them.
  • Unwitting Instigator of Doom: Due to not being built with the ability to make peaceful decisions in the first place, he can only answer to Zero/X's demand of disarming with "no", thinking of it as an insult to Repliforce's honor. Cue the rest of the game.

     The General 
https://static.tvtropes.org/pmwiki/pub/images/xv_general.png
Voiced by: note 
The leader of the Repliforce
  • Well-Intentioned Extremist: He pretty much meant no harm about his army's peaceful exile to space. Unfortunately, the same cannot be said to his forces on earth.

    X 4 Spoiler Character 

Iris

https://static.tvtropes.org/pmwiki/pub/images/mmx_-_iris_4292.jpg
Voiced by: note 
She is introduced in X4 as Zero's girlfriend who gets caught in the middle of the civil war between her brother the Colonel (fighting for Repliforce) and her lover (fighting for the Maverick Hunters). She initially helps Zero as his Mission Control (she once had to break up a fight between him and Colonel). She also appears in the chronologically earlier Xtreme 2/Soul Eraser and in a cameo appearance inside Zero's memories during X5.After Zero retires her brother, she goes insane and installs her brother's combat skills, completing Ultimate Soldier and forming a ride armor like body around herself, becoming a mid-boss in his playthrough. She challenges Zero and he is forced to kill her in self defense. With her body consumed by the destruction of Final Weapon (not to mention her mind already being damaged due to incompatibility with her brother's fighting will), she is Deader Than Dead.
  • Adaptation Personality Change: Iris is a bit more strong willed in X4's manga adaption. She acts as a nurse treating casualties, which includes Zero, snaps at Zero when he mouths off at her (even she's surprised), stops Colonel and Zero's first fight by threatening to shoot herself, among other actions. Justified in that the manga doesn't follow the games as closely, as a pre-X1 flashback shows Zero and Colonel having a friendly chat.
  • Ambiguous Situation: Upon her defeat in the Mega Man X Legacy Collection's X Challenge mode, Colonel catches her and they teleport out, or she lies on the ground if you beat her first, unlike other bosses who explode on defeat.
  • Attack Drone: In her boss fight, every time you hit her, she will release drones that slowly home in on Zero and explode on him for good amounts of damage. Worse still, you have to hit her in order to expose the crystal and to push her backwards.
  • Beware the Nice Ones: She's as nice as you can get, but there's more to her than meets the eye...
  • The Cameo: Appears in Project X Zone during one chapter. Zero's infamous throes appears again.
  • Commissar Cap: Specifically, a beret. Which seems indicative of rank, as she does not have it in Xtreme 2/Soul Eraser official artwork.
  • Cores-and-Turrets Boss: In her boss fight, her Ride Armor-like body is invincible. Attack it enough times and its purple crystalline external core would appear. Attack that core to inflict damage.
  • Died in Your Arms Tonight: The infamous scene of Zero's "WHAT AM I FIGHTING FOR??!" has her dying like this.
  • Dying as Yourself: After the battle with her Ride Armor-like body, she's seen being put on Zero's arms as her normal self before she dies.
  • Evil Brit: After her Face–Heel Turn.
  • Expy: Along with Colonel, she gets one in the Battle Network series.
  • Face–Heel Turn: After Zero "retires" Colonel, Iris gets blinded by grief and rage over losing her brother in that she's willing to combine his programming with her own (despite it being dangerous to her) just to kill Zero.
  • Fanservice Pack: Played straight and inverted between X4 and Xtreme 2. In-universe, it's played straight, as Iris has only a white metal plate for a chest in Xtreme 2, yet has visible breasts in X4 (which happens after Xtreme 2). However, Xtreme 2 was released after X4 (X4 in 1997, Xtreme 2 in 2001), meaning Iris was redesigned with a more "basic" (read: flat) Reploid chest, inverting the trope.
  • Go Out with a Smile: She smiles at Zero for one last time before she drops dead.
  • I Let Gwen Stacy Die: Her death remains a huge factor in Zero's life/lives.
  • Ironic Echo: She has a desire of having a world only for Reploids and living peacefully in it with Zero. It's the exact same desire (minus the "living with Zero" part of course) of Elpizo of Mega Man Zero 2.
  • Love Hurts: Especially for Zero, who has to destroy her in self-defense because she's angry at him for destroying her brother.
  • Love Makes You Evil/Crazy: Her love for her brother, that is, which causes her to try to kill Zero after the latter killed Colonel.
  • My Skull Runneth Over: Even if Zero had only incapacitated her by simply destroying her armor (which he probably did, but the armor...well...), Iris would have likely still died due to her systems being fried from downloading Colonel's battle data.
  • Neutral Female: She doesn't take any side when her boyfriend and her brother fight, wishing for them to just stop fighting.
  • Ooh, Me Accent's Slipping: Her English voice actress seems to randomly switch between standard American, British, Texan and Australian. Possible Justified Trope due to the damage that downloading her brother's combat data would have caused to her mind.
  • Powered Armor: Her One-Winged Angel, which suspiciously looks like a Ride Armor.
  • Sibling Yin-Yang: She's caring, peaceful and compassionate, while her brother Colonel is battle-hardened, aloof and values honor.
    • Thanks to supplemental material, this is justified: she and her brother were the result of an experiment to create the ultimate combat Reploid. The Repliforce scientists couldn't get the warrior and pacifist sides of the personality to mesh, so they were split into Colonel and Iris and they have a mental link from sharing over half the same mental programming. She's literally unable to go beyond her neutral-ness if Colonel's alive. More specifically, they were an attempt to replicate the titular X's ability to handle the personality paradox. The fact that they failed to live up to these principles, even one at a time, causing Zero to have to kill Colonel and then a grieving Iris to combine their power, attack Zero, and also have to be killed may have originally foreshadowed that X would eventually no longer be able to handle the Logic Bomb himself - Copy-X of Mega Man Zero was originally intended to be an X who had lost that compassion and reluctance to kill and become a Knight Templar that Zero would have to kill.
  • Synchronization: It's revealed in the manga that the damage that either Iris or Colonel sustain will get extended to the other because of their unique bond. This gets exploited when she threatened to shoot herself to stop his brother and Zero from fighting each other.
  • Triang Relations: She tried to mediate between her lover and her brother. It didn't end well.
  • Took a Level in Badass: Appears in the Mega Man X Legacy Collection's X Challenge mode for the final level along side Double. Not only could she be the final boss X fights, but she can summon Colonel in his full form for back-up, effectively making the fight three on one!
  • Voice with an Internet Connection: Acts as this for Zero until her Face–Heel Turn, reprised this role for Xtreme 2. Managed to avoid Annoying Video-Game Helper due to not interrupting you during the levels.
  • Walking Spoiler: What happens to her later in the game are, well, important things, especially for Zero. She doesn't appear in later games for a reason...
  • Wave Motion Gun: Her primary weapon during the boss fight with her is a very large energy cannon.
  • What the Hell Is That Accent?: Part of X4's sub-par English voice acting.
  • Woobie, Destroyer of Worlds: She didn't take Colonel's death well...And it ends in her own death.

Techno & The Shadow Hunters

    Techno 
https://static.tvtropes.org/pmwiki/pub/images/mmx_techno.png
A Maverick hacker and one of the primary antagonists of Mega Man Xtreme. With the help of Shadow Hunters Geemel and Zain, he hacks into the Maverick Hunters’ Mother Computer and sets it to cause chaos worldwide. It’s later revealed that he was corrupted by Sigma, who had him hack the Mother Computer in a bid to take over the cyber world. He’s also the twin brother of Middy and shares the same CPU as him.
  • Alas, Poor Villain: As he dies he admits that Sigma corrupted him by taking advantage of his weak heart.
  • Back from the Dead: Sort of. After his death in Normal Mode he returns in The Stinger of Hard Mode to tell you about Extreme Mode. This appearance clearly isn’t part of the story though so he’s still considered dead in canon.
  • Brainwashed and Crazy: Courtesy of Sigma.
  • Cain and Abel: The Cain to Middy’s Abel, though it wasn’t his fault.
  • The Cracker: A skilled hacker that’s working for Sigma.
  • Died in Your Arms Tonight: Dies in Middy’s arms- right before Middy dies as well due to them being twin brothers that share a CPU.
  • Evil Counterpart: To Middy.
  • Heel–Face Door-Slam: Is brought back to his senses when X destroys the computer containing his CPU note , but it ends up killing him (and Middy) as well.
  • Heel–Face Revolving Door: Middy’s statements imply that he was a decent person until Sigma corrupted him. He returns to his senses when X destroys the computer that (unbeknownst to X) contains his CPU- killing him in the process.
  • Hijacked by Ganon: As it turns out, Techno is being mind-controlled into hacking the Maverick Hunters’ computer by Sigma.
  • Hollywood Hacking: His hacking abilities are portrayed this way.
  • Non-Standard Character Design: Techno's design is considerably simpler than everyone else in the game, and everyone else in the X series for that matter. He looks like he'd fit well in the Classic series.
  • Theme Naming: He's named after techno music while his brother is named after a type of sound file.
  • The Unfought: You don't get to fight him, though he’s probably not a fighter.

The Shadow Hunters

    In General 
A mysterious group formed by Geemel and Zain that helps Techno hack into the Mother Computer. With Techno they serve as the primary antagonists of Mega Man Xtreme.
  • Evil Counterpart: To X and Zero. Like those two, Geemel and Zain are both hunters of some kind (we’re never told what a “Shadow Hunter” is exactly), are a projectile user and sword user respectively, are partners and good friends (at least good enough for Geemel to refer to Zain as his “buddy” and vow to avenge him after he’s killed), and have contrasting personality types (Geemel is cunning while Zain is more focused on fighting, similar to how X is ideologically driven while Zero is more duty bound).
  • Expy: With Techno they serve as this to the X-Hunters, as they’re a Big, Thin, Short Trio of Mavericks that are initially presented as the main antagonists but are later revealed to be working for Sigma, can be optionally encountered (though only Geemel and Zain can be fought), and have similar personality types (the big one only cares about fighting, the thin one is cunning, and the short one is the smartest).
  • Skippable Boss: You can encounter Zain and Geemel in the Maverick stages via an optional side-path. You get no apparent reward for fighting them this way, however.

    Zain 
https://static.tvtropes.org/pmwiki/pub/images/mmx_zain.png
Uses a large sword and only seems to be interested in fighting.
  • BFS: His weapon of choice, complete with Spin Attack.
  • Blood Knight: He's only interested in defeating X... although it's also entirely possible this is a result of him being a Flat Character.
  • The Brute: He's the biggest of the two and seems to be only interested in fighting.
  • Spin Attack: He can move while doing it in the rematch.

    Geemel 
https://static.tvtropes.org/pmwiki/pub/images/mmx_geemel.png
Cunning and malicious, with ninja-like abilities.
  • Avenging the Villain: He vows to avenge Zain after he's killed by X.
  • The Cracker: In Hard Mode Geemel returns alone to hack the Mother Computer himself (as Techno and Zain died in Normal Mode). note 
  • Cyber Ninja: He has ninja-like abilities and enough hacking skill to mess up the Mother Computer himself.
  • Dirty Coward: Not only does he turn tail and run when X reaches their hideout, but he leaves Techno behind in the process without batting an eye.
  • Flash Step: His usual mode of transportation, when he isn't flying on a giant kite.
  • Fuuma Shuriken: His weapon of choice.
  • Giggling Villain: Kekeke!
  • Ninja: He uses a Fuuma Shuriken, teleports, flies on a giant kite, and is very cunning.
  • Screw This, I'm Outta Here!: See Dirty Coward above.
  • Teleport Spam: See Flash Step above.
  • Verbal Tic: His “Kyee” and “Kekeke” laugh.

The Soul Erasers

    In General 
A pair of Reploids named Berkana and Gareth that run the Reploid Research Laboratory on Laguz Island. They are the ones behind the “ERASURE” incident and serve as the primary antagonists of Mega Man Xtreme 2.
  • Disc-One Final Boss: They are the final bosses of X’s and Zero’s missions respectively (Berkana for X and Gareth for Zero). Sigma is the True Final Boss and is encountered in Extreme Mode.
  • Expy: Of Gate and High Max. Like Gate, Berkana is a Reploid researcher conducting dangerous experiments that cause widespread chaos, kicking off the events of the plot. Like High Max, Gareth is said Reploid researcher’s powerful creation and acts as their public face, providing a cover story for their activities.
  • Guys Smash, Girls Shoot: Berkana fights using projectiles and generally keeps her distance (though she’ll occasionally lunge at X for contact damage if he’s near her) while Gareth is a javelin fighter and generally gets up close to attack (though he’ll frequently jump off screen and toss javelins at Zero from a distance). They are matched with the hero that mirrors their respective fighting styles (X, a projectile user, fights Berkana; while Zero, a sword user, fights Gareth).
  • Hijacked by Ganon: Zig-Zagged. In Extreme Mode, after beating either Berkana or Gareth, Sigma comes out of nowhere and claims he was the one responsible for the entire "ERASURE" incident. He does, however, admit that Berkana had gone too far, but was fine with that since in the end it amused him. This implies that Berkana and Gareth had initially been conducting the “ERASURE” experiments on Sigma’s behalf but then at some point started doing it for their own benefit rather than his.
  • Necromancer: They resurrect eight Mavericks from the first three games to guard the island from intruders.
  • Red Oni, Blue Oni: Berkana is hammy while Gareth is stoic.
  • Soul Power: Berkana and Gareth (and possibly Sigma) are stealing Reploid souls to make themselves more powerful.
  • Your Soul Is Mine: The Soul Erasers are stealing Reploid programming (their souls) from all over the world.

    Gareth 
https://static.tvtropes.org/pmwiki/pub/images/xv_gareth.png
A knight-styled Reploid who works with Reploid research and development.
  • All There in the Manual: Haruki Suetsugu designed him to have a Reploid lion companion that was never featured in the game. He jokingly begs the audience to just assume the lion follows Gareth around faithfully, but not in any way that is visually confirmable within the game.
  • Black Knight: Keeping in the medieval theme set with Zain and Geemel in Xtreme, Gareth is crafted to look like a classic knight.
  • The Dragon: To Berkana.
  • Javelin Thrower: His attack of choice, either throwing his Laser Javelin while off-screen, or up close at point-blank range.
  • Leeroy Jenkins: He suggests taking out X and Zero immediately, but Berkana suggests studying the Hunters would be more useful.
  • Luckily, My Shield Will Protect Me: He uses a powerful shield that blocks most of Zero's attacks, he is only vulnerable to certain special attacks, or right when he's attacking with his javelin.
  • No-Nonsense Nemesis: Has shades of this. He insists to Berkana that they should eliminate X and Zero immediately, and when later confronted by Zero he apologizes for the “unworthy” games, pointing out that they were Berkana’s idea.

    Berkana 
https://static.tvtropes.org/pmwiki/pub/images/xv_berkana.png
A wizard-styled Reploid who works with Reploid research and development.
  • Battle Ballgown: Sports a full-length gown, complete with golden spikes along the trim and hover technology. Justified in that she's a Reploid made to look like a witch.
  • Dark Action Girl: One of the few examples in the X series.
  • Dragon with an Agenda: Sigma’s statements imply that she started out as his dragon but then began stealing DNA souls for herself in order to become the strongest Reploid.
  • God Save Us from the Queen!: Although she is made to look like a witch, she has several queenly attributes, from sitting on a throne to acting as the self-proclaimed leader of the Soul Erasers. She's also quite unapologetically evil, using the souls of countless Reploids to strengthen herself and her Black Knight.
  • Hot Witch: She's modeled after a witch of sorts, although a rather good looking one for a Reploid.
  • Hover Mecha: She never seems to touch the ground, instead hovering through the use of her Battle Ballgown. She does seem to have legs, however, as one shot of her shows an outline of her legs crossed while sitting.
  • Interface Screw: Her attacks include projectiles that can disable X's ability to jump or shoot.
  • It Amused Me: The reason why she doesn't try and stop X and Zero from destroying the island guardians. Also, the reason why Sigma doesn't stop Berkana, even though she had started acting in her own interests instead of his.
  • Lady of Black Magic: Evokes this. She looks like a witch, wields a staff for her magic-like attacks (which include Interface Screw), and is very powerful.
  • Spikes of Villainy: The bottom of her Battle Ballgown is covered in a row of golden spikes.
  • World's Strongest Reploid: Becoming this appears to be her goal. She refers to herself as this, refers to the Reploids whose souls she stole as necessary sacrifices that made her and Gareth stronger, and later fights X as her final experiment in order to determine who's the strongest Reploid.

Gate & The Nightmare Investigators

    Gate 
https://static.tvtropes.org/pmwiki/pub/images/mmx_-_gate_2308.jpg
Voiced by: note 
A Reploid researcher dedicated to the illegal field of Reploid resurrection, in X6 he was infected by a part of Zero while inspecting the wreckage of the Eurasia space colony. Driven insane by The Virus and the persecution of the scientific community, Gate resurrected seven of his retired creations (plus one, who was his comrade), and teamed up with the enigmatic and mysterious Isoc. Together, they created a powerful Reploid: High Max, a virus-like army of drones called The Nightmare, and the Zero Nightmare: a discolored clone of Zero. He used the Nightmare to cause global chaos and "the ghost of Zero" to pull the blame off his Nightmare Investigators, who were in fact searching for something else: the real Zero. Eventually, he would be challenged by X and would reveal that he had created an almost indestructible armor based off of Zero's design; however he would ultimately be defeated.
  • Hoist by His Own Petard: After his defeat, he revealed that he has (incompletely) revived Sigma. But then it bites him in the ass when Sigma declares that he doesn't need Gate's help and attacks him.
  • Instant Armor: Before the battle against him, he appears in his normal form with his labcoat. Then he swapped his labcoat aside and then his golden armor instantly appears on his body.
  • Insufferable Genius: So much that it gets him shunned by his fellow researchers. Alia lampshades it, saying that the difference between her and him is that she knows where to draw the line while he didn't.
  • The Social Darwinist: Besides eliminating the squishy humans, he wishes to subjugate "low-grade" Reploids and create a world ruled by high-end models like himself.
  • What Happened to the Mouse?: The ending of X6 left his fate rather ambiguous. Was he spared by Alia and restored? Or did she leave him dead?
  • Woobie, Destroyer of Worlds: The unlucky bastard may have been a prick beforehand, but he became feared by the other scientists because all of his creations are deemed "potentially dangerous". Said creations themselves were killed by either sabotage or under false Maverick accusations. And then the guy got infected by the Sigma Virus. Anything that makes you crazy enough to think resurrecting Sigma is a good idea has got to be nasty.

    High Max (HI-MAX) 
https://static.tvtropes.org/pmwiki/pub/images/mmx_-_high_max_3468.jpg
Voiced by: note 
A powerful Reploid made by Gate using Zero's DNA. He's the leader of the Nightmare Investigators, and tasked to gather Reploid volunteers in order to help them.
  • Beam Spam: One of his attacks is him shooting lots of Energy Balls from his palms. Later, as his Desperation Attack, he floats to the center of the screen and generates giant energy balls one by one that are shot quickly at you and can break into 4 smaller balls if you attack them.
  • Bonus Boss: A variation - he can be accessed in the secret areas in the game, after you beat Nightmare Zero in another secret area. And later, he becomes the boss in one of the fortress stages.
  • The Dragon: for Gate.
  • Elemental Punch: He has an attack where he charges an Energy Ball on his palm and then flies forward, trying to strike the player character with it. This is before Naruto, mind you.
  • Expy/Shout-Out: He's quite obviously based on Pluto, from the Astro Boy comics. Appropriate, considering how the original Mega Man is often compared (and is pretty much an expy) to Astro Boy.
    • His look, voice (courtesy of Norio Wakamoto), creation by a Mad Scientist using the protagonists as a base, "perfection"/"maximum" motif, and general haughtiness also call to mind Perfect Cell from Dragon Ball Z.
  • Guide Dang It!: It's hard to figure out how to hurt him without finding a guide.
  • Hopeless Boss Fight: In the first fight against him. After a few seconds, he'll just scoff at how unimpressive X is and leaves.
  • Luckily, My Shield Will Protect Me: In his boss fight in Gate's second Secret Lab stage, he's able to summon these to protect himself. He can also summon a cylindrical force field that makes him totally invincible, but only for a short duration.
  • Marathon Boss: Whenever you're able to damage him (see Puzzle Boss below), he has an overly long recoil-and-fly-off-the-screen animation, during which he is invincible. Yes, it's incredibly tedious, and this back-and-forth cycle goes on until he's almost out of health, when he goes ballistic and floods the screen with projectiles. Mercifully you can continuously attack him during that.
  • Meaningful Name: His name really reflects his powers.
  • Power Floats: He floats all the time.
  • Puzzle Boss: He can only be damaged by (with X) shooting him with a Charged Shot, and quickly follow up with any of the boss weapons (excluding Guard Shell) or a Nova Strike if equipped with the Ultimate Armor, or (with Zero) the opposite (boss attack followed by any of the basic saber slashes).
  • Sequence Breaking: After you beat him in the secret areas, you can go straight to Gate's first Secret Lab stage, even if you haven't beaten all of the usual 8 bosses yet.
  • Smug Super: Being higher in terms of specs than X and Zero, he's very arrogant.
  • The Stoic: In spite of being voiced by Norio Wakamoto, he pretty much never emotes or leaves a 'calm' state. He's almost monotonic!
  • This Cannot Be!: After you beat him in the secret areas, he can't believe that he's defeated by old robots like X and Zero.
  • Unwinnable: If you go into the rematch with High Max in the 8 boss stages right after beating Nightmare Zero (thus, having no boss weapons to damage him with) and you're not using X with the Ultimate Armor or the Shadow Armor, you are stuck.
  • Villain Forgot to Level Grind: the first battle you have with High Max is an automatic loss. No matter what you do, he cannot be damaged. Of course, as you go along the game and subsequently encounter him again, he will be damageable by a few weapons you acquire from the boss Mavericks.

    Isoc 
https://static.tvtropes.org/pmwiki/pub/images/mmx_isoc.png
Voiced by: note 
A scientist employed by Gate to inform the public of the Zero Nightmare and the formation of the Nightmare Investigators.
  • Back from the Dead: Is implied to be another vessel of Dr. Wily. This is shown when he tells Zero that he knows him very well, and when Zero finds his lifeless body, he hears a voice calling him a robot (rather than a Reploid). Alia also questions why Isoc decided to keep Zero alive when he left him vulnerable. It's also known that he's the one who was crucial in Zero's repair moreso than Gate had ever been, and whereas he displays an open and amicable fondness for Zero, when X is the one standing in his way, he has nothing but some serious vitriol.
  • Black Eyes of Evil: He has black sclera, combined with red pupils.
  • Dropped a Bridge on Him: Sort of. His lifeless body is discovered after Gate's demise with no ceremony or explanation, but Alia notices something peculiar — namely, it's not so much that he's been killed, so much as his consciousness seems to have just left his body.
  • The Face: Serves as the spokesperson to Gate's plans.
  • Laughing Mad: His reaction to Zero defeating High Max in his Bonus Boss encounter, amazed at how Zero was able to beat him while X couldn't.
  • My Skull Runneth Over: The reveal of his demise. Alia notes that his CPU is vacant in a manner eerily reminiscent of the Erasure Incident, aiding the serious implication of Isoc having been Wily in the Reploid having possibly been just a robotic shell he'd inhabited.
  • The Unfought: He is never fought in a boss battle, though he promises to destroy X if he beats High Max as a Bonus Boss.

Other Characters

    X 4 Spoiler Character 

Double

https://static.tvtropes.org/pmwiki/pub/images/mmx_double.png
Click  to see his true form.
Voiced by: note 
Introduced as a rookie Hunter in X4, this little fat yellow Reploid acts as X's Mission Control and seems bumbling and harmless. Nevertheless he's loyal to X, assisting him in any way he can....until it is revealed that he was a Maverick working for Sigma all along (and possibly even against him too), with a much more sinister second form.
  • Attack Drone: He only releases this if you use the Double Cyclone (his weakness) on him. Makes sense as the move blows off his Jello coating.
  • Ax-Crazy: He seemed positively delighted to drop cover and slaughter some Maverick Hunters so he could go after X.
  • Batman Gambit: Both his story purpose — he knows how overall trusting X is and takes on a form specifically designed to evoke such trust — and in battle — he's aware of the Elemental Rock–Paper–Scissors present in the series, discovered his own weakness, then made it so that it's actually harder to beat him with it. See Attack Drone above.
  • Bitch in Sheep's Clothing: Not only he is a double agent, he also masks his murderous psychopathy beneath a gullible, meek personality.
  • Bishounen Line: His true form is positively more good-looking (and sinister) than his fat form.
  • Big Fun: He's a rotund, clumsy, and cheerful fellow. That's for his disguise at least.
  • Blade Below the Shoulder: Laser Blade variant.
  • Calling Your Attacks: "Kiba Flash!"
  • Deadly Disc: One of his attacks involves throwing a large blue spinning energy disks.
  • Double Agent: See Meaningful Name for more.
    • Double Reverse Quadruple Agent: "The Mavericks, Hunters and Repliforce... idiots, all of them. They're making my job too easy!" Unless this line is a translation error of some sort, it would suggest that his allegiance isn't to Sigma and is secretly working against him.
  • Evil All Along: Not only he works for Sigma, he is outright murderous.
  • Facial Markings: There's green paint below his eyes.
  • Family-Unfriendly Death: The transformed Double literally slicing apart various Reploids in one cutscene, complete with what appears to be blood gushing from their wounds for some reason. It makes it surprising the game was rated E for Everyone!
  • Fat Idiot: His disguise is a goofy looking round Reploid that frequently trips causing his fellow hunters to laugh at him.
  • Lack of Empathy: Not only does he not have any regret for using X and betraying him upon his defeat, he actually mocks X for having a trusting nature, stating that's his fatal flaw.
  • Laughing Mad: His reaction both before and after fighting X (and in the case of the latter scenario, being defeated by him), not to mention his reaction when thinking about killing X.
  • Lean and Mean: His true form is rather skinny, and psychotic as opposed to his chubby, and friendly disguise.
  • Meaningful Name: He's the double sized, double formed double agent double minded: Double! And his weakness? Double Cyclone. Overlaps with Punny Name.
    • Then there's the pre-release name for his Maverick form on Capcom's X4 website Jello Man. It's both a subtle jab at the rotund frame of his "innocent" persona, as well as a reference to the strange-looking stuff inside the semi-transparent purple windows of his body.
  • Obfuscating Stupidity: He pretends to be a goofy, and overweight Reploid, when he's really a cruel, and thin Maverick.
  • Pre Ass Kicking One Liner:
    "I'm gonna recycle you!"
    "Ha ha ha... You're gonna get hurt, X!"
  • Red Eyes, Take Warning: In his second form. Notably, his irises is actually black, but his sclera is red.
  • Shadow Archetype: Of X. One of X's defining traits is his inability to reconcile his pacifist nature with the reality of the fighting and killing he has to do to achieve peace. Double exaggerates this with his two forms: One is clumsy, meek, and useless; the other is evil, Ax-Crazy, and a very potent combatant. Double is literally both sides of X's personality brought to negative extremes.
  • Sword Beam: Can fire large blue crescent beams if he's low on health.
  • Verbal Tic: In the Japanese version, he ends his sentences with "deshi" instead of the normal "desu". He does it even as his second form.

    Dynamo 
https://static.tvtropes.org/pmwiki/pub/images/mmx_-_dynamo_8594.jpg
Voiced by: note 
A mercenary hired by Sigma during the events of X5 to spread the virus inside the space colony Eurasia, in order to destabilise its orbit. While the Hunters were racing against time to prevent this, Dynamo challenged them to fights in order to slow them down. He reappears in X6, this time on his own trying to increase his power by the use of Nightmare souls. He never makes a reappearance in later games.
  • Chuck Cunningham Syndrome: After X6, he's never even mentioned.
  • Cool Shades: Red visor, to be specific.
  • Double Weapon: His beam saber, though he never actually fights with it in the traditional Double Weapon style.
  • The Dragon: He is a mercenary hired by Sigma during the events of X5.
  • Giant Space Flea from Nowhere: His appearance in X6 is just him trying to collect a lot of Nightmare Souls to get stronger. He otherwise doesn't have a bearing to the main plot.
  • Ground Punch: Which results in lasers fired out from the ground.
  • Informed Attribute: Was apparently given a combat rating of GA. That's a level above Zero. And wiping Eurasia's entire population single-handedly is an impressive feat, to reflect on his rank. In-game, he tends to be a pushover, even if you don't have his weakness weapon.
  • Karma Houdini: Doesn't receive proper comeuppance for causing the deaths of millions due to the Eurasia crash. He just disappears from the series entirely after his irrelevant appearances in X6. He does appear in Sonic the Hedgehog/Mega Man: Worlds Unite, where he finally dies by getting Hurricane Kicked in half by Ryu and Ken.
  • Know When to Fold 'Em: He has the good sense to beat a retreat when things turn against him instead of fighting to the death.
  • Level Grinding/Peninsula of Power Leveling: In X6, hit him with his weakness (Meteor Rain/Ensuizan) twice in quick succession and he'll drop a Nightmare Soul worth 200 points, the kind you normally only get for beating the 8 bosses quickly. You can do this three times per battle and you have unlimited opportunities to fight Dynamo. Get the picture?
  • Psycho Supporter: Our introduction to Dynamo has him begging Sigma to be allowed to let an orbiting colony crash to Earth, so he can draw out the top Maverick Hunters for a fight. As far as we know, that is his only excuse for teaming up with Sigma (he doesn't even show up in Sigma's fortress at the end, like the ally/patsy typically does).
  • Smug Smiler: Always lets out a wide smile, and he's an easygoing guy overall. He's also very confident in his own abilities.

    Zero Nightmare 
https://static.tvtropes.org/pmwiki/pub/images/mmx_zeronightmare.png
Voiced by: note 
An insane clone of Zero created by Gate to cause havoc in areas being patrolled by his Nightmare Investigators. He is first encountered destroying the opening stage's Warmup Boss, and can later be fought in any of the main stages' secret areas.
  • Amazing Technicolor Population: Has bright pink skin. He tries to convince X that it's the result of the Nightmare Phenomenon when he's trying to pose as the real Zero.
  • Ax-Crazy: Has a very erratic demeanor and murderous attitude.
  • Came Back Wrong: Not exactly, but one of his conversations with X suggests that he was created with a personality similar to Awakened Zero. Unfortunately, he isn't as strong as the original.
    Zero Nightmare: WHERE IS ZERO? WHERE IS HE HIDING? A BLUE ROBOTnote . ENEMY OF ZERO...KILL YOU!
  • The Cameo: Appears in Marvel vs. Capcom: Infinite as an alternate color for Zero.
  • Composite Character: Most of his moveset is taken from Zero's boss fights in X2 and X5.
  • Dark Is Evil: His attacks are colored black.
  • Evil Knockoff: Notably an evil knockoff of a character who was created for evil purposes.
  • False Flag Operation: A walking one, created by Gate to justify the existence of the Investigators.
  • Mood-Swinger: He can go from engaging in civil conversation with X to loudly declaring his desire to kill him.
  • Palette Swap: Is a discolored version of Zero. In-game it's subverted as he uses a different set of sprites from the real Zeronote .
  • Purple Is Powerful: He has a predominantly purple/pink color scheme.
  • Weaksauce Weakness: The clone of Zero is weak to Zero's own weapon.
  • You Gotta Have Blue Hair: Has bright pink hair as part of his discolored appearance.

    Red 
https://static.tvtropes.org/pmwiki/pub/images/mmx_-_red_8129.jpg
Voiced by: note 
Leader of the vigilante bounty hunting organization "Red Alert", He is the main antagonist of X7. Yeah right, of course the real Big Bad is still Sigma. When Axl decides to leave Red Alert, he challenges the Maverick Hunters for his return.
  • A Father to His Men: He's angered at seeing "pals" turned into Mavericks and Sigma forces him to get Axl back by holding them hostage.
  • Bounty Hunter: The Red Alert is basically this, and he's the leader.
  • Disc-One Final Boss: No guesses as to who...
  • Egocentric Team Naming: Leader of the RED Alert Syndicate.
  • Expy: Appears to be one to General from Mega Man X4: Both are leaders of Maverick Hunting organizations, both are manipulated by Sigma but not quite turned Maverick, both are Disk One Final Bosses (though that should go without saying at this point) and both go down with their lairs as they start to collapse.
  • Good Scars, Evil Scars: He's an abrasive man and he has a scar on his face. Ultimately, he isn't evil though, just manipulated.
  • The Grim Reaper: Design notes confirm he is based on the Grim Reaper.
  • Jumping Off the Slippery Slope: He and his gang started attacking innocent Reploids and generally acting more violent, which leads to Axl defecting from the group. In actuality, Red was conned by "The Professor" (who is actually Sigma) into abusing Axl's data to power up the rest of the syndicate. By the time he realizes who he's dealing with and what he's done, Sigma infects the rest of the team and he's forced into seeing the fight through to the end.
  • Load-Bearing Boss: He rigs the room he's fought in to collapse once he's defeated.
  • Parental Substitute: He does think of Axl as something of a son. Even to the point of encouraging him to escape as the room they're fighting in collapses.
  • Redemption Equals Death: His last words before his demise are encouraging Axl to escape and to keep living.
  • The Remnant: Red was confirmed in a ''Mega Man X7'' soundtrack booklet to be a veteran from the Repliforce War. Ironically, his Maverick Hunting group meets the same fate.
  • Sinister Scythe: His Weapon of Choice is a double-scythe, with blades on both ends. Fitting, as he's modeled after The Grim Reaper.
  • Villain's Dying Grace: He sets a bomb in the section of the palace he's fought in, but allows the Maverick Hunters to escape. He even refuses to allow Axl to help him and tells him that it's not his time.
  • Unwitting Pawn: He's tricked by Sigma into using Axl's DNA data to get stronger. It's then Subverted when he realizes that Sigma was just using him and his gang. Unfortunately, Sigma turns his teammates against him at that point and leaves him no choice but to continue the war.

    X 8 Spoiler Character 

Lumine

https://static.tvtropes.org/pmwiki/pub/images/mmx_-_lumine_7015.jpg
Voiced by: note 
The overseer of the Jakob Project, a Space Elevator being constructed to allow mankind to colonize the moon. Lumine is in fact a New Generation Reploid, featuring the copy chip present in Axl. He is kidnapped by Vile at the start of the game as part of Sigma's plans.After Sigma is defeated, Lumine reveals that he was actually secretly manipulating Sigma as part of his plans to eliminate not just humanity, but also all old generation Reploids as well.
  • Grasp the Sun/Got the Whole World in My Hand: He does this to the Earth (as he's standing on the moon) before the Final Battle.
  • Last Breath Bullet: He did this to Axl, with a tentacle-like appendage from his wrecked body.
  • Light Is Not Good: Not just having light-based attacks in the second form, said form also looks decidedly angelic; even his name means "light". And we're led to think he's good... before The Reveal.
  • The Man Behind the Man: Apparently to Sigma.
    • Zigzagged. In the opening of the game Lumine leaves you hanging with ominous feeling that there may be more to him than meets the eye. Sigma says that the Jakob project is his idea, and that all of the copy chips of the New Gen Reploidsnote  contain Sigma's personal data. As Alia puts it, all the Maverick New Gens are less so controlled by Sigma, but actually seem to be him in some way, and this includes Lumine above than any other. While he was waiting to usurp the plan from Sigma, this isn't a case of getting the better of the old virus, moreso simply being the next "incarnation" of Sigma as his offspring.
  • Manipulative Bastard: He played the innocent victim, but in reality, he was helping head the entire ordeal in X8.
  • Marked Change: The moment he exposes his horrifically evil true nature, Lumine's deceptively blue eyes flare into bright orange.
  • Meaningful Name: Somewhat. Fans were quick to cite the similarity of his name to the original Fallen Angel. For double points, it's also Latin for Light.
  • Meta Twist: You'd think that Sigma is still the Big Bad. Go play this game, and... be surprised.
  • Musical Theme Naming: All his attacks except Paradise Lost (Refrain, Legato, Bel Canto, Gravé, Unison and Oratorio).
  • Obviously Evil: Him being the true Big Bad of the game probably would've been a better twist if he hadn't been so blatantly sinister from the get-go.
  • One-Winged Angel: He not only grows angel wings, but the background suddenly becomes cloudy and sunny... despite you're fighting on the moon.
  • Peek-a-Bangs: He has a bang covering his right eye usually.
  • Perpetual Molt: His second form has feathers falling down from his wings - even though he has robotic wings.
  • Power Copying: His first form packs every Desperation Attack of the eight standard bosses.
  • Power Floats: He floats in both rounds of his fight.
  • Power Gives You Wings: In his second form.
  • Power Glows: He glows every time he absorbs a colored orb of the Mavericks' powers.
  • Psychotic Smirk: When stomping on Sigma's corpse after claiming that Sigma was apparently his Unwitting Pawn.
  • Red Eyes, Take Warning: DEAR FRACKING LORD!
  • Robots Enslaving Robots: He plans to destroy all of the Old Generation Reploids so the New ones like him could rule.
  • Rocks Fall Everybody Dies: His Paradise Lost attack. On the plus side, while charging it, he doesn't do anything else but hide in his wings and teleport. If you fail to finish him off in about 30 seconds, the trope is invoked.
  • Shielded Core Boss: He protects himself with multiple layers of shielding that must be broken to damage him, but as the battle wears on and he reveals his ultimate Desperation Attack, the player must do so within a time limit to win the battle.
  • True Final Boss: In Normal and Hard modes. On Easy, you'll just fight Sigma.
  • Wrong Genre Savvy: He believes that he personally manipulated and usurped Sigma's position as the head of all Mavericks. However, what he seems to not realize is that his behavior was born of emulating Sigma's through the data in his copy chip; in essence just being a new Sigma taking the place of the old.

    Dr. Albert W. Wily 
https://static.tvtropes.org/pmwiki/pub/images/mmx_-_wily_6702.jpg
Voiced by: note 
Thought to have been gone since the Classic series, the mad doctor himself seemingly takes a page out of Dr. Light's book, in that he actually might have cheated death. His influence throughout the entire conflict can still be felt with the Maverick Virus that he (possibly) created, and, of course, his masterpiece, Maverick Zero. His plans have reached its peak at the Series Fauxnale of the series, X5.
  • Aborted Arc: Hinted to be The Man Behind the Man in X5, but after that we only get a few half-hearted follow-ups.
    • Revisited in Tatsunoko vs. Capcom, where Wily seems to come to terms with Zero being a good guy, saying how proud he is of Zero and wishing him well and to never give up, though there is a small hint towards Zero's original dark purpose.
  • Back from the Dead: Word of God is that he returned to life for the events of X5, something to do with the Maverick Virus.
    • It's implied that the Virus is a creation of Wily, using the Evil Energy from Mega Man 8, as a baseline. Doesn't help what with the Roboenza of Mega Man 10 doing the EXACT SAME THING as the Maverick Virus.
    • It should be noted, that the Irregular/Maverick/Sigma Virus was created to fix the cognitive flaw in Zero's programming, as well to empower him to his true self. The element, which causes Reploids and Mechaniloids to go Irregular/Maverick, is based on X's Suffering Circuit, which also explains its use on Zero. The Roboenza Virus might or might not be part of the Irregular/Maverick/Sigma Virus, but it is more likely that Wily created it with several purposes in mind.
    • The Nightmare Investigator from X6, Isoc, has the same voice actor as Dr. Wily's Japanese voice actor in other works, as well as a very too-detailed knowledge of Zero's systems. When found later on? Isoc is simply a dead Reploid shell, his AI simply gone. It's implied that Dr. Wily exists as a formless AI (some fandom theorizes that Wily's mentality is part of the Maverick Virus).
    • The Japanese version of X2 heavily implies that Serges/Sagesse is Dr. Wily. He refers to X as "Rock" before correcting himself, and namedrops Dr. Light when defeated for good. Serges was also in charge of repairing Zero, in the game that first implied Zero was created by Wily.
  • Bald of Evil: As usual for Wily.
  • Beard of Evil Wouldn't be Wily without his signature mustache.
  • Evil Plan: Even though Sigma got in the way of either destroying or corrupting X, he still got a century of war out of it. Heck, the next series starts with Zero out of commission and an evil X running the last of the destroyed world — while it's not the real thing, he arguably won.
  • Greater-Scope Villain: As Zero was (unconsciously) responsible for Sigma's corruption, who in turn is the primary antagonist of the series, it is Dr. Wily who is the ultimate root of basically all of the X series' conflict.
  • Hijacked by Ganon: If the series' conflict (through The Virus and Zero) can really be attributed to him.
  • Irony: Go ahead and guess. Even after all the damage his creation(s) have done, who's the one who eventually ended it all?
  • The Man Behind the Man: He created the virus responsible for pretty much every bad thing in the series and he's implied to have been this to Sigma directly in X5.
  • My Death Is Only The Beginning: It was (presumably) after his death that the Maverick Virus was unleashed. It's even implied he's somehow living through the virus.
  • Posthumous Character: Long dead, but he is to blame for all the Maverick incidents because of his creations, Zero and the Maverick Virus.
  • So Proud of You: Surprisingly, yes. In Tatsunoko vs. Capcom he accepts that even if Zero was never quite what he designed him to be, that doesn't mean his creation never achieved greatness. He's so proud of Zero that he even acknowledges him as his son, something he'd never done for any of his other creations.

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