These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Mega Man Zero
Alternate Character Interpretation: It's implied throughout the series that Zero regains at least some of his memories. What he remembers and when he remembers it is mostly left unknown, as well as how much any of that memory influences his decisions in any given situation.
Elpizo from the second game. If you can avoid his six-orbs energy absorption attack, you can pretty much dodge anything else he throws at you. His second form is arguably even easier, basically being a large floating target in the middle of a large empty walled room with easy-to-dodge attacks. Compare this with the spike-laden stage that you have to traverse to get to him, as well as the Boss Rush in between. A few blows from your charged Z-Saber will destroy his second form in a matter of seconds.
Omega plays this straight and then subverts it. His first 2 forms, thanks to the GBA limitations, are slower and predictable than what is implied from the story. His final form, however, is a Lightning BruiserBerserker capable of thrashing you within seconds if you're not careful.
Broken Base: No, really. Zero's death is still a hot debate, no matter the Jossing. And, remember that the Zero series officially ended in 2005.
It Was His Sled: Thanks to that long-standing argument, no one would be surprised about Zero's fate now.
Well, kind of. The Official Complete Works didn't really elaborate on his fate, and at best stated that he was missing in space. For a thing that would elaborate on a lot of things in the Zero mythos, it really seemed to screw up when it came to revealing Zero's fate.
Complete Monster: Dr. Weil. Following the peaceful resolution of the Maverick Wars by the sentient superprogram, the Mother Elf, Weil decided that Reploids needed to pay for their crimes. To this end, Weil corrupted Mother Elf by turning her into the Dark Elf, and triggered the Elf Wars. Weil used the Dark Elf and her children, the Baby Elves, to control Reploids and force them to fight each other in massive battles, which resulted in the deaths of 90% of all Reploids and 60% of all humans. Defeated, exiled and transferred into a mechanical body for his crimes, Weil eventually returned one hundred years later, consumed with a thirst for vengeance directed at all life for the perceived crimes against him. Weaseling his way into becoming the supreme ruler of Neo Arcadia, Weil turns it into a dystopian hellhole. When he breaks his citizens to the point where they're desperate enough to risk escaping into the wastelands to form their own colony, Weil decides to obliterate their new home with a Kill Sat. When his Kill Sat is disabled, Weil attempts to drop it upon the colony, killing everyone in the region. Cruel, megalomaniacal and displaying an unprecedented level of sadism in the series, Weil reveled in the suffering of others and desired nothing less than to make human and reploid alike feel like their existences were living deaths.
Evil Is Cool: Copy X's armor would spectacularly break any Mega Man X game, essentially being X5'sFalcon Armor with extra firepower and Charge Man's weapon thrown in for fun.
At the end of the first game, Cyber-Elf X starts projecting an image of himself in a blue robe when talking to Zero. A Cyber-Elfy halo appears above his head in this form.
Copy X, even moreso. If his first form full of angelic wings aren't enough, in his One-Winged Angel form, he almost literally turned into a seraphic angel. Add to the fact that he's fighting Zero, a crimson-horned reploid.
Foe Yay: Three of the Four Guardians have this going on with the titular Zero (the ones that isn't Phantom).
"Funny Aneurysm" Moment: The antagonists of the first three games in this series all have the Greek letter Omega as their symbol. Sure most of them are Knight Templars, but they still mean well, fighting for the sake of humanity. But later we're introduced to an actual character named Omega, who is everything that the antagonists (except one) ever stood against.
Somewhat related: in X2, Zero, freshly Back from the Dead, very easily destroys a weak clone of himself that the Big Bad made. Cue the third game, where Omega (the same one mentioned above) is the original body of Zero, while The Hero is the clone. But it was subverted, the clone Zero didn't mind the irony of the situation he was in, and goes on to defeat Omega Zero easily. Also, The Hero may be using a duplicate body, but the mind is real; he is still the real Zero. Omega Zero is now just a mindless puppet.
Resistance Girl: You're terrible! Even though you've kissed me before... Shoot, you probably forget every girl...
Goddamned Bats: The spiked wheel enemies. They are inordinately tough (two saber slashes when one will do in most anything else that moves), coming rolling from offscreen towards you (or occasionally from behind) with no warning, do a ridiculous amount of damage (more than virtually any other normal enemy), move just fast enough that it would take split-second reflexes to dodge them, spawn again if you move mere pixels backward from where they appeared, and are sometimes dropped in by lifter robots for added cheapness.
Harsher in Hindsight: In Mega Man X4, This exchange is made by Sigma and the General in regards to humanity's views on Reploids when the former was trying to recruit the latter:
Sigma: It's about the Maverick Hunters, General. They are far too eager to please the humans and hunt down the Reploids! Do you believe they pose a significant threat?!
Sigma: You already know the truth, General! Their sole mission has been to destroy any Reploids who fail to do as the humans order!
As this series, and especially Dr. Weil's speech to Zero in Zero 3 showed, Sigma actually turned out to be right.
Dr. Weil: Hehehehe...How pitiful. Of course, a Reploid like you would never understand. The joy of ruling all that you see...Only a human could possibly understand!
Dr. Weil: That's right! I'm a bona fide human. The creator of Reploids...A human being!
Dr. Weil: The desire for power. The joy of making everything work for you. You have no way of experiencing this without a human brain. It's the ultimate joy! No mere Reploid could ever understand!
That being said, Sigma (and by proxy, Weil) was only partially right - there's obviously some humans who think like that, but in this series, considering all of Neo Arcadia's propaganda, who would blame them? To say that all Humans Are Bastards in this instance would be to use the same fallacy that Yggdrasil used in Digimon Savers (using evidence of the actions of one Complete Monsternote who, amusingly enough, was a lot like Weil to tar humanity with the same brush). Plus, part of Dr. Weil's motivation (according to the supplemental material and before he jumped off the slippery slope) was that he was getting back at the Reploids for their constant violent uprisings, which were heavily precipitated by the Sigma Virus.
Moral Event Horizon: Copy X was just more of being morally ambiguous in the first game (performing genocide on Reploids because of the energy crisis, supposedly for the better for humanity). However, in the third game, he's willing to launch a missile to a city block full of innocent humans just to obtain the Dark Elf. At this point, Hero AntagonistHarpuia can't stand it anymore and defects from Neo Arcadia. A bit later, when Copy X and Weil contact the resistance to cooperate, Ciel cites this event as why they can't be trusted. To be fair, Copy X is reborn as Copy X Mk. II by the Obviously Evil Dr. Weil and he also manipulates Copy X to do so. Clearly Weil must have done things in him, including the Electronic Speech Impediment and the booby trap implanted in his body which activates when he goes One-Winged Angel.
Player Punch: Elpizo aims for getting the Dark Elf, and to do so, he had to destroy the seal, X's body. When Zero finally catches up to him near the seal, he forces Zero to watch by binding him with the Baby Elves' powers as he stabs X's body, destroying it and releasing the Dark Elf.
Starboarding: Unfortunately, because of Zero's mentality in this department, fans have settled for this.
Neige with Craft, the most blatant example in the entire series franchise (besides Zero/Iris).
Ron the Death Eater: A rare canon (at least, What Could Have Been) example: X becomes a tyrant Knight Templar dictator and Zero is the hero with a different body. Though probably Keiji Inafune had a reason for X becoming bad...at least, we can see the potential of it from the backstory for this game.
Saved by the Fans: X. Not from death per se, but from being an Ax-Crazy dictator. Similar to what happened to Axel, this resulted in his inaction with regards to the Guardians' attempts to kill Zero. The sequels give him other things to worry about and the issue really doesn't come up again.
And that's not all. Temporary Platforms abound. Temporary Platforms that have no side grip, shoot bullets downward, leave no margin for error, and are placed above enemies which you will likely land on should you fall. There's also three bosses.
Made more confusing by being based on a Kitsune, which can change genders. Makes more sense if you assume that his inhuman battle form is his true form.
There's also Anubis Necromancess (boss in Zero 1 and 3), confirmed to be male note His name in Japan is Anubistep Necromances, with one "s", and Polar Kamrous (in Zero 2) which, despite the matching build and deep voice, is female.
Weirdly enough, the Complete Works book refers to Kamrous as male.
Notably averted with Dr. Weil. While Wily and Sigma got hit with this hard due to reappearing as the Big Bad and getting defeated over and over in their respective series, Weil never even made an appearance until The Stinger of the second game, and the player never got to fight him until the fourth and final game and he still managed to take Zero with him, killing him for good...to some extent.
Villainous Crush: Possible explanation for Fairy Leviathan's obsession with Zero. She even admits that she doesn't really care about much else so long as she gets to fight him.
Alouette is implied to have gone through a Break the Cutie livelihood, and might have suffered even worse, if Ciel hadn't found her.
Iron Woobie: Almost all the tragedies in the X series are inflicted on Zero, and even more are piled on here. Like the fact that he wakes up seeing the current state of the world, and freshly awoken, he has to continue fighting, again, and he was able to finally return the world to a peaceful state, which was what he and X have been fighting for a long time, only for him not to see it come to fruition, seeing as he's dead...
Stoic Woobie: After looking at Harpuia's motives, personality and the situation he's in, it's pretty easy to feel sorry for him.
Woolseyism: Some of the boss' names are changed overseas. In particular, Dr. Weil's name was originally Dr. Vile. There's already another guy who's named Vile (who is originally called VAVA), so the name change is to avoid confusion.