Hero Antagonist: In the second game. After Grey/Ashe fight them, they stop being antagonistic.
Heroic BSOD: Vent and Aile suffer this twice: the first time is when they arrive at the Area H theme park, where they lacked responses to their support group as well as snapping as to where the Biometal is before explaining why they were acting strangely (the fair was the place that the mavericks attacked and resulted in their becoming orphans); the second is when they learn from Serpent that their hatred of Serpent resulted in Model W reawakening, allowing Serpent to be absorbed into Model W. They get better both times, though.
And one more for Aile: Before Serpent dies, he tells Aile that "the blood of the creator of Model W flows through her veins". She's shocked and then she questions her own destiny. Giro then gives her a pep talk.
Hot-Blooded: Vent in ZX. He mellows out considerably in ZXA, but shows a few traces of his previous hot-headed nature.
It's Personal: They lost their mother to a Maverick raid on Area H ten years ago, and the lack of intervention on Slither Inc.'s part gave them a reason to hate the company. The truth behind it gives them a reason to search for Model W... and that's to destroy it.
Serpent: "If you're so confident in yourself, then let's see which of us is destined to rule the world!" Aile/Vent: "I don't care about ruling the world! If you're the Mega Man destined to rule the world, then I'm the Mega Man that's destined to save it!"
Rapunzel Hair: As Mega Man Model ZX, both get it, although the hair is artificial. Their real hair becomes this in ZX Advent. Especially Vent.
Apparently, this was done as a way for both to honor Giro's memory, though it's more noticeable with Vent.
Reflective Eyes: After their transformation in ZXA, Grey (for Aile) or Ashe (for Vent) is shown in their eyes.
Schrödinger's Player Character: You're effectively choosing not who to play as at the outset of ZX, but who fills the blank role of protaganist. The other character is never mentioned in the story.
Advent continues this; if you play as Grey, you meet Aile and she saved the world in the previous game, and if you play as Ashe, you meet Vent and he saved the world, but you never meet the other two characters.
Sempai Kohai: Vent uses "Senpai" to address Giro, at least in Japanese versions.
Shoryuken: An additional saber technique for Vent in ZXA. He can also fire a large Sword Beam when he does so.
Cannot Spit It Out: Model A seems to be suffering from Laser-Guided Amnesia at first, but by the time they reach Ouroboros, Master Albert says that Model A should have remembered everything by that point, namely the fact that Model A was created by Master Albert and that Grey is his backup body.
Goggles Do Nothing: The big cables on his back were supposedly used for transmitting power and/or brainwashing, but after he's released from the capsule, they're pretty much useless (aside from looking cool).
Laser-Guided Amnesia: Due to the fact that he literally has nothing to remember. According to Master Albert's plans, Model A was supposed to fill-in Grey on the details should anything have happened to Albert.
Pursued Protagonist: Mimicking Zero in the first Zero game, he was sealed in an abandoned lab before being pursued by the Resistance (Zero)/the Hunters (Grey), and then they also grab a gun from a dead body.
White Hair, Black Heart: Subverted. He may be rude and gets annoyed easily, but he's influenced by the heroics of the Hunters and thus deeply cares about people. According to Pandora, he even was meant to have a black heart.
The female lead of ZX Advent. A Hunter in search of loot and fortune (or as she calls it, "booty"). Her ambush on the Raider's air fleet had her biting off a lot more than she ever hoped to chew — namely "The Game of Destiny" as well as Master Albert's fabrications and relation to her. Unlike most Mega Man characters, Ashe's buster fires only two shots at a time, though each shot is more powerful than normal.
Chain Lightning: Her Homing Shots ability (minus the lightning elemental part), which involves her targeting up to 8 enemies and then firing a lightning-like beam to the nearest targeted enemy which will jump to another targets, one-by-one.
The Unchosen One: Ashe is the only Mega Man that Albert did not intentionally create, but she can Megamerge with Model A because she's Albert's distant relative.
This Is My Story: She says this twice, once after defeating Albert "You're no Mega Man king... You're no god... You were gonna destroy the world... You were gonna end the story... You're not the one to make that decision! This is my life, my story!" And when saying goodbye to Vent at the end, "We can meet anytime... Because this is our story!"
Becoming the Mask: A heroic variant. While it's stated in Aile's story that the Guardians's first commander was the one who requested Giro to look after the survivors of the Maverick incident (i.e. Vent and Aile), he comes to genuinely care for them, prompting his Heroic Sacrifice.
I Know You Are In There Somewhere Fight: When Serpent mind-controlled him to attack Vent/Aile, he/she tries to bring back his mind in the boss fight. It is a success... but then Serpent finishes him off.
Put on a Bus/What Happened to the Mouse?: Despite their aid to Vent and Aile in the first game as well as the implications that Vent/Aile became full-time members after ZX, no one from the group, not even Prairie, makes a reappearance in ZX Advent.
The current leader of The Guardians who took command after the original leader went missing during an investigation of an Outlands area. She hires Giro Express to transport the Biometals Model X and Model Z, and helps Vent/Aile on their mission to combat Slither Inc. and the Maverick attacks. Due to her appearance, memorabilia, and remarks made during the story (such as her being present when Ragnarok broke apart in the atmosphere), Prairie is heavily implied to be Alouette, Ciel's Kid Sidekick from Mega Man Zero.
Cool Old Guy: Wisecracks and jokes quite a bit with the heroes, and is the most down-to-earth out of the Sage Trinity.
Hey, It's That Voice!: In Japanese, he's voiced by Chō aka Yuichi Nagashima, which makes him Jaken. In English, he's voiced by Walter Roberts... the same voice as Sigma in Mega Man X7. Jeez, talk about role reversal.
Japanese Pronouns: He uses kisama to address Thomas when the latter revealed his plans in the secret ending.
Ornamental Weapon: He's depicted carrying a small sword/knife that apparently doubles as his cane, but never uses it.
Treacherous Quest Giver: While he gives many good, generous quests throughout the game, this trope really comes to play near the end of the game; he orders the Hunters to take down Albert so he can replace him.
Badass Adorable: Pandora, although her "adorable" overshadows the "badass," especially in comparison to Prometheus.
Blood Knight: Prometheus is quite nihilistic, enjoying nothing more than mindless violence and a good fight. However, this may have been deconstructed after your fight with them in ZX Advent; he hints that his having to do senseless fighting was one of the reasons as to why he and Pandora wanted to betray and kill Albert in the first place.
Co-Dragons: For both Albert and (for a short time) Serpent.
Dragons With An Agenda: They play this role to Serpent, explaining why they leave him to his own purposes towards the end of ZX.
The Corrupter: According to others, Slither Inc. began to change the moment Prometheus and Pandora came onto the scene.
Dark and Troubled Past: From the game itself, it's implied that they've been suffering throughout their lives. If the drama tracks is anything to go by (see Flashback Nightmare below), it also shows them getting invaded by Mavericks when they were younger.
Expy: Pandora is possibly a subtle one to Shion Sonozaki. Both wear their hair in a similar fashion, have the same shade of green, prefer white and blue (the hue is different) and both are driven to madness as the result of a rather nasty past.
Flaming Skulls: One of his attacks in the first game summons four of these to the corner of the stages, and each of them will fire small fireballs at you. It's hard to dodge, but you can destroy the skulls, reducing the difficulty.
Power Floats: Pandora is almost always seen floating. Prometheus only floats when he uses area attacks.
Theme Naming: Named after two of Saturn's moons, as well as two mythological Greek deities; Prometheus (the god who introduced man to fire) and Pandora (who opened up the quintessential Sealed Evil in a Can, allowing all of the repressed, negative emotions to plague mankind).
Woobie, Destroyer of Worlds: Despite appearances, they spent a long time fuming at the fact that they were made to be slaves for Albert's Game of Destiny. Prometheus's Famous Lastwords, before he and Pandora are royally owned by Model W, were a long rant about how pointless Albert's goal was, and that he might as well destroy the whole world thanks to the pain of what he and his sister had to endure.
The head of Slither Inc. in the first game. Was corrupted by Model W at some point before and sought to fully awaken its power. To do so, he sacrifies Cyber Elves filled with the power of fear, which he creates by killing humanoids through what seems like random Maverick raids. He succeeds in reviving Model W, but the resurrection is short-lived. As Serpent dies, he declares all of humanity to be Mavericks for stopping progress.
Aile, "He" Is Your Ancestor: Tells Aile that "the blood of the creator of Model W" runs through her veins. Come ZXA, we find out that it's Master Albert.
Well, kind of. Although Aile did indeed carry Albert's blood, it's not because they were actually related as it was because Master Albert donated some of his blood to Maverick survivors as part of his plan (except for Ashe, as she is the legitimate descendant of Albert himself).
Expy: Both his forms, especially the first, will remind you a lot of Copy-X from the Zero games.
Final Boss Preview: He's first seen mind-controlling the injured Giro, and then he introduced himself after he strikes Giro down again (after you fight Giro as the boss).
Freudian Excuse: Aile's story, as well as Aeolus' cipher in ZXA, suggest that the reason he ended up being affected by Model W is because he was a Maverick raid survivor, and that he was afraid of his past. Having a trace of Albert's blood sealed the deal, though.
Gemstone Assault: In his second form he can create growing crystals and then smash it, its debris can damage you.
Ground Pound: His first form has a move where he teleports directly above you and then tries to smash you with his feet. In Hard mode this move also fires off spreading energy shots.
Lightning Bruiser: Serpent's first form on Hard mode is this Up to Eleven, and is among the most difficult boss fights in the whole franchise. Most of his attacks are sped way up or have extra range by extension, demanding sharp reflexes and careful positioning to avoid having your tiny lifebar shot to nothing. It's essential to memorize his attack pattern and where his blind spots are after attacking (and he'll probably be killing you enough times for you to find a rhythm). The trouble is, even after you get it down pat, the pressure is still on to not get hit because he's a Sequential Boss, and you're carrying any damage taken into the next round. Have fun.
Sequential Boss: Continuing the tradition. In Round 1, he Megamerges with Model W in a traditional manner (akin to the protagonist's ability). You defeat him just in time for Model W's core to awaken for Round 2. Even in Round 2 he can expand his form 2 more times.
Social Darwinist: He even pulls out the iconic misunderstood "Survival of the fittest" line.
Well-Intentioned Extremist: He states that he wishes to evolve the world rather than destroy it. In addition, he tells Vent that he wishes to remove pain and suffering from the world. His methods for doing so? Model W.
Woobie, Destroyer of Worlds: A large part of his character was from being an implied orphan from a Maverick attack, and it is strongly implied (although he denies it) that he suffered from intense fear from that past, evidentially leading to his insanity. In addition, in the Japanese version, when denying Vent's retorts to Serpent, Serpent sounded a bit melancholy.
You Killed My Father: Not directly, but it is implied that Serpent arranged for Vent and Aile's parents to be killed.
You Will Not Evade Me: His second form can create a black hole to pull you in (or alternately push you away).
Actually a Doombot: Prometheus kills Albert when he and Pandora shows up in Albert's underwater base. Then after they fought Grey/Ashe, their emotions are suddenly sucked into the Model Ws in the background. Turns out, the Albert that Prometheus killed was a decoy.
All Your Powers Combined: As Mega Man Model W (fittingly referred to as the "Ultimate Mega Man"), he uses Model A's Homing Shots, Model ZX's Charge Saber, Model H's Plasma Cyclone, Model F's Ground Breaker, Model L's Freezing Dragon, Model P's Cross Star, and Chronoforce's Time Bomb (although it's used only to counteract and nullify the player's own Time Bomb). note His "Bits" even glow with the appropriate colour for each borrowed attack.
Badass Bookworm: Whereas Thomas and Mikhail are depicted as carrying a sword and a knife, Albert is usually seen holding a book.
Cool Chair: Before the fight against him, he is seen sitting on one, before it transforms into the aforementioned three-headed dragon.
Crosshair Aware: He has an attack in which he sends out a crosshair which tries to follow the player and shoots at certain intervals.
Damage-Sponge Boss: First half of the final battle. His throne tank is such a Stone Wall that it doesn't even get a lifebar. The goal is to cherry tap it in the gut as fast as you can mash the fire button, whenever you get the chance, until it explodes.
Devil in Plain Sight: When the character designers name you after the first villain of the entire franchise, your chances of being on the heroic side of the spectrum don't look too good, eh? Sadly, no one in the game takes note of this connection.
Evil Counterpart/Mirror Boss: Could be considered one to Grey/Ashe, seeing as his abilities with Model W (see All Your Powers Combined above) are identical to that of Model A's, but stronger and more versatile. Justified in that Model A was created to mimic the power of Model W as a backup plan in case Albert was somehow incapacitated.
Luke, I Am Your Father: An interesting variation on this trope: Most of the Mega Men that are encountered, including the protagonists in the previous game, were able to Megamerge not only because they survived Maverick Raids, but because Albert altered their DNA with his genetic code which allowed them to Megamerge. However, Ashe was the only one whose DNA can be traced to Albert that wasn't due to genetic tampering, meaning her familial relationship to Albert was legitimate. Played completely straight with Grey, however.
The Man Behind the Man: It's implied that Albert (via Prometheus & Pandora and Model W) was manipulating Serpent.
Unwitting Pawn: It's also implied in Ashe's story that Albert may be manipulated by Model W, his "creation," no less.
My A-Trans Is Better Than Yours: Possess the "real A-Trans" (Shin Trans-On in the Japanese version), allowing Albert to be able to change himself into the forms of those whose souls and negative emotions were absorbed by Model W. In addition, he does not even need to transform to utilize said powers (see All Your Powers Combined above). As Albert explains himself, Model A's A-Trans is a pale imitation.
Ouroboros: His grand plan to unite all of the Model W fragments creates this.
Offing the Offspring/You Killed My Father: Fully intended to do so with Grey [his robotic creation] and/or Ashe [his legitimate descendant]. On the topic of Ashe, it's also heavily implied that he was the one who arranged for Ashe's parents, who likewise are most likely Albert's descendants as well, to be killed in a Maverick Raid.
Pet the Dog: An extremely, extremely small one when he expresses sympathy and regret over having to do in Ashe.
Power Floats: In the cutscene of the reveal about him being the villain, he floats away using Model W. Later in Ouroboros, he slowly floats up as he transforms and the artificial sky breaks around him.
And during the battle with his Model W form, the only way to have Albert touch the ground is to forcibly introduce him to it.
Shielded Core Boss: As Mega Man Model W. He has a forcefield which you need to destroy by damaging it enough; only then can you do damage to him. He does regenerate the forcefield after a short time, so give it all you've got once the forcefield is down.
Wave Motion Gun: As Mega Man Model W, he can fire two of these from the background to the left and right of the boss stage, and will slowly converge to the middle.
Well-Intentioned Extremist: His pre-final battle speech implies that the reason he decided to use Model W was because he wanted to stop people from fighting amongst themselves. The irony is positively ludicrous - how big is Advent's Gambit Pileup?
With My Hands Tied: His real body appears to be in a restraining jacket. It doesn't stop him from duping Prometheus and Pandora, though. He finally breaks out of it when he Megamerges.
Clockwise from top: Thetis, Atlas, Siarnaq, and Aeolus
A group of mysterious youths who play "The Game of Destiny" to determine who will be the king of their world. They are the new holders of Models H, F, L, and P, which were stolen from Vent and Aile prior to ZX Advent. Each Mega Man has their own reason for indulging in Master Albert's fanatical game. They are:
Aeolus, ModelH's Biomatch and the stereotypically smug and beautifulSocial Darwinist. His plan for society, should he win, logically follows this ideology (specifically, he wants to "eliminate the fools out of this world").
Enemy Mine: There Can Be Only One! The four aren't friends, and would probably try to betray the others in their quest to become the Mega Man King. They appear to pull this again with Master Thomas. Could result in an Enemy Civil War.
I Need You Stronger: When Grey/Ashe meets Aeolus and Siarnaq in the Tower Of Verdure, Aeolus tells him/her to hone their skills before they can effectively fight, and then he and Siarnaq teleport out. It later bites him in the ass, resulting in This Cannot Be! below.
Just a Kid: How Atlas views Thetis. Thetis doesn't exactly take well to this and points out that she isn't that much older than him.
Not Themselves: It's implied that the Biometals stolen from Vent and Aile have somehow been bent to the will of their Biomatches. Given that all four Biometals are inexplicably The Voiceless in ZX Advent, it's truly unknown at this point. Additionally, this is taken to a literal degree, as the Megamerges look different from their ZX versions (especially in the case of Siarnaq and Model P), most likely due to the absence of Model X. Gameplay-wise, they function the same, with the moveset of each Biometal usually split between Grey and Ashe.
It's also implied that the enemy Mega Men themselves are either being influenced or are outright brainwashed due to their red eyes, which, as seen in the case of Serpent and (briefly) Giro in the first game, may imply that Model W has some sort of hold over them.
Nothing Is Scarier: Siarnaq doesn't seem to have any motive at all for participating in the Game of Destiny. It only makes his robotic disposition and shadow powers even creepier.
Theme Naming: Like Prometheus and Pandora, Aeolus (Helios), Atlas, Thetis (Tethys), and Siarnaq were all supposed to be named after Saturnian moons. note Helios is occasionally referred to as Hyperion, one of Saturn's many moons. Additionally, Aeolus, Helios, Atlas, Thetis, and Tethys are figures from Greek mythology (a majority of them being Titans) whose powers and backstories correlate to the Elemental Powers of the quartet. In this regard, Siarnaq is the odd man out; his only mythological counterpart is a mythical Inuit mermaid patron of seals.
This Cannot Be!: The insufferably arrogant Aeolus cannot believe that he was bested by an inferior Mega Man like Grey or Ashe.
Villains Forgot To Level Grind: Presumably. They certainly didn't expect Grey/Ashe (relative newcomers to The Game of Destiny) to become more adept at using Model A in such a short time, to say the very least.
At least they were Genre Savvy enough to gang up on Grey/Ashe in the last level right before the Final Boss. Unfortunately, that's when Aile/Vent shows up to hold them off.
Well-Intentioned Extremist: Thetis and Atlas, especially Thetis. Atlas, as said above, wants humanity to become stronger, while Thetis wants to protect his beloved ocean from the progress of man. However, Atlas believes that humans can only evolve via suffering, and the ocean's safeguarding is verySerious Business to Thetis. Given that they're using Model W to accomplish said goals, their once-noble goals are taken to extremes.
Who Wants to Live Forever?: It is strongly implied that the four Mega Men's survival had to do with their having the Reploid Immortality data in the Hard mode Stinger, though Thomas' line about human bodies might imply that if any of the enemy Mega Men were humans, they'd be using a Body Backup Drive like Master Albert did.
You Don't Look Like You: In an odd way: Their Megamerged forms, being from a single Biometal (instead of a merge with Model X from the first game), doesn't match the forms of the Guardians themselves, except for Atlas' note Like Fefnir's, her horns protrude from the front side of her helmet, while Model FX's come from the back side (although the same can be said for Girouette's form of Model Z). Some have theorized that it's because of the darker nature of the Enemy Mega Men's personalities, while some others theorized that the design evolved from their clothes note For example, Siarnaq's scarf evolves into Model P's faceguard while Thetis' Idiot Hair evolves into Model L's single water-thruster, unlike Model LX's "twintails".
The main 8 bosses for the second game; they house Model W, unlike in the first game.
Ambiguously Gay: Rospark may be a robot, but he sure acts the part. A rose-based Pseudoroid with a clownish voice who enjoys fighting Grey while acting like Ashe is full of cooties, wields electrified vine whips as a weapon, has a large, pink very phallic rod at his groin area (but also another one on his head), and have we already said that he is a rose? Is there any other way to take that?
Lethal Joke Character: Chronoforce, as you take its form; it can't move at all on land, but is immune to attacks from attacks from above and its charge shot, the Time Bomb, is very useful. You can even change form after it's activated.
Musical Assassin: Vulturon fights with a guitar-shaped instrument and 2 amplifiers. With those things he can animate pieces of junk, create a barrier of sound force, screw with your movement or just smack you with it.
Except Buckfire, whose speed and higher jumps makes him a comfortable method of getting from Point A to Point B when you didn't unlock enough beacons. The fact that you can spam his three-directional shots that ALSO do Damage Over Time to virtually all enemies and bosses in the game also makes him a good choice for some boss battles, most notably Queenbee. His only real weakness is his gigantic hitbox.
Shared Life Meter: Argoyle and Ugoyle, when fought, initially appear to have single health bar. However, when you activate Model H and use it to Enemy Scan them, you'll see that each of them has their own health bar.
Sibling Yin-Yang: Argoyle has an open mouth and talks a lot, while Ugoyle has a closed mouth and only talks in short words. They're also named after Buddhist figures Angyo and Ungyo.
Spike Shooter: Chronoforce and Bifrost can shoot icicles, while Rospark can shoot rose thorns.
Spread Shot: Quite a few. Buckfire's flaming arrows and Hedgeshock's Charged Attack sparks are of the regular variety, while Rospark's thorns is Spray Bursts.
Chronoforce's boss only move has him shooting a spread of icicles.
Spring Shoes: Buckfire's upwards horn attack can be used as this.
Stance System: Rospark has 2 forms: bulb form and flower form, the latter accessible by climbing ropes.
Tail Slap: Bifrost can whack enemies with his tail as he switches direction.
Time Master: Chronoforce proclaims himself as such. One of his attacks even include firing icicles that come in different directions, then reversing time to make the icicle flying back at him.
Fun with Acronyms: They establish the M.E.G.A. (Meta-Encapsulated Granule Awareness)/R.O.C.K. (Rebirth Of Crystallized Knowledge) System; in layman's terms, this system enables the user to Megamerge/Rock On with it.
Transformation Is a Free Action: Subverted for the most part in that the users are either transforming quickly or getting some protection while transforming, but played straight in the anime cutscenes in the second game.
Transformation Sequence: Except for the bonus Biometals, all of the Biometal users provide this, in one way or another.
I am the light that illuminates all possibilities, Lumine Infinitus...
He, along with Model Z, was escorted by Vent/Aile and Giro in the first game. It and Vent/Aile fell off a cliff when his/her motorbike gets shot by Mavericks. In a desperate attempt to defend Prairie and Guardians from the incoming Giga Aspis, Model X offers him/her the power to stop it, becoming its Biomatch in the process. When Vent/Aile gets injured after Serpent curbstomps him/her, Model X got weakened a bit, and cannot be used on its own; this triggered their first Double Megamerge with Model Z (courtesy of Giro dying and giving said model to Vent/Aile). They're still in Vent/Aile's possession as he/she appears in the second game.
I am the courage that fights for beliefs, Fortitude Creed...
Girouette is its Biomatch, either by the start of the first ZX (in Vent's storyline) or from when Aile was still young (in Aile's storyline). After Giro got mortally wounded, he gave Model Z to the hero.
Sword Plant: A new technique for Aile in the second game.
Sacrificial Lion: It's Zero, so this doesn't come as a tremendous surprise, but at the end of Advent, Model Z disengages from Vent/Aile to singlehandedly hold the Enemy Mega Men off, allowing the protagonists to escape while he goes down with Ouroboros.
Based on Harpuia, Fefnir, Leviathan, and Phantom of Neo Arcadia's guardians. Unfortunately, just like their past selves, they have a bad habit of being used by the villainous camp (although this time unwillingly).
Denial of Diagonal Attack: Averted and Inverted. The touch screen can shoot kunai from any angle, but uses weapon energy. However, spamming the attack button will eventually cause all kunai to shoot at an upward diagonal.
Nerf: The Shadow Dash ability, in Zero 3, was a borderline Game Breaker that rendered most of the bosses in that game dramatically easier. Here, only Model P (the least efficient form against bosses) can use it, only when Overdrive is turned on, and only in the first game. Ouch.
Elemental Punch/Spell Blade: Models HX, FX, and LX's Overdrive Mode abilities are imbuing their normal attacks with elemental attributes.
My Master, Right or Wrong: In ZX it's spelled out, in no uncertain terms, that none of the Biometals can defy the intentions of their masters and can conceivably be used for good or evil. This is hit home in Advent with the Four Guardian Models falling into the hands of the Enemy Mega Men.
Model Z seems to somehow be able to suppress and pin down said Mega Men, though.
The Obi-Wan: They (along with Models X and Z) all give Vent/Aile some pep talk before his/her second fight against Serpent.
Megaton Punch: its busters can be used for this, sending the enemy off flying forward.
Super Mode: Overdrive Mode, only available in the first game.
The most mysterious of the Biometals and a central figure of ZX Advent. He seems to be based on Axl, but given the lack of proper conclusion to the X series and Master Albert having something to say about what that "A" stands for, who knows.
Secret Keeper: After they collected the last cypher (from Vent/Aile), he remembers his purpose (that is, as a backup should Albert somehow fail), and considers it for the best that he doesn't tell Grey/Ashe about it until they're ready. Albert ends up doing it first, though.
The original Biometal, and the major driving force of the games. It was created at the end of Mega Man Zero 4, when Dr. Weil merged with Ragnarok and was destroyed, but with the fragments still containing his mind. It causes otherwise normal Mechaniloids to change into Mavericks and can corrupt people's minds. The Big Bads of both games seek to revive its powers. As it turns out, Master Albert supposedly "created" them all. It comes in two forms: a miniature version like the other Biometals which totally doesn't look like the man from from whom it originates, and the giant Model W Core of which there are tons.
Back from the Dead: The souls of the ZXA Pseudoroids are bound to the Model W, and thus, it can resurrect them via the "True A-Trans". Fitting, given Dr. Weil's specialty in the MMZ series is DNA revival.
Eldritch Abomination: The core. Even if it is an immobile twisted-up chunk of metal, it looks as if it wants to gnaw your face off. The other cores in Advent don't all look quite as sickening... But wait until you see the Ouroboros.
Emotion Eater: It eats negative emotions of the people to activate itself.
Evolving Weapon: Serpent's final form in ZX becomes bigger and more imposing with every life bar you knock off, and the last stage of this reveals a giant mechanical face, as if to suggest some person or presence is on the verge of awakening. (Three guesses as to who...)
Light Is Not Good: Mainly colored gold and white, and, in case of Albert, looking like a seraphic angel when he transforms. Unquestionably evil, given its origins.
Ouroboros: All the fragmented Model Ws can merge to form a massive floating structure called this.
The Plan: Implied; Model W is most likely keeping the Gambit Roulettes of all the other major players in the story spinning away, waiting for somebody or something to fully resurrect it.
Plot Hole: Are the Model Ws fragments of Ragnarok? Did Albert actually make them all instead? Or both? And where did the handheld Model Ws come from? Advent isn't very clear about any of these things...
Powered by a Forsaken Child: A variation; in the first game, Serpent feeds the Model W Core with the Cyber Elves of the people who are filled with fear and terror before they're killed, to activate it.
Womb Level: The second half of Ouroboros runs with this theme, what with the giant beating heart-like mechanism looming in the background. After Albert dies, it promptly stops and turns the entire interior of the place a dull gray.
Your Soul Is Mine: It eats the souls of those who are consumed with fear or hate, as Prometheus and Pandora learn too late.
Your reward for conquering ZX's Bonus Boss, Omega's final form as Zero's original body. No small task, as he is no longer a pushoverby any stretchof the imagination. Double Megamerges with Model X to play as a near-exact replica of Zero from his series and break what's left of the game over your knee. (Which isn't much — you can only receive Model O on a cleared save file.) Like the boss you get it from, it's a non-canon fanservice extra.
Palette Swap: Recycles Zero's sprites with Omega Zero's palette and buster shot sprites.
Previous Player-Character Cameo: Controls identically to Zero series Zero, right down to the extra range on his saber slashes (Model ZX has a shorter reach), plus ZX's highly spammable spinning slash, just to be sure it makes ZX obsolete altogether.
Super Mode: It has an Overdrive mode like the Four Guardians, which never runs out, and augments all of his attacks, as well as somewhat changing its playstyle into X series Zero note He can't use his sword or buster attacks while dashing, and he can't use the charged saber with some original attacks from Omega Zero added.