The Nightmare Fuel page for all incarnations of Mega Man. Even the cartoon.
In order for Nightmare Fuel tabs to survive, a new writing style is going to be used, nicknamed Example Lobotomy. Basic rules: Just list facts as they are. Don't just say "character X" or "the X scene" (such zero context examples will be zapped). Spoiler policy to be determined on a case-by-case basis. Italics to be applied to works' names only and not to give emphasis on what tropers say. "X scared me" is already implied by the mere addition of that example by the troper.
The following entries have their own page:
The end of Mega Man 2 with the final Wily stage. A creepy cavern with what looks like blood or acid dripping from the ceiling, no music, and Dr Wily turning into a holographic alien, with only one weakness and the ability to kill you in 2 to 3 hits.
2's Wily Stage 3 has a very spooky feel.
In Mega Man 3, the music that plays in Wily stage 5-6 has a scary feel. Combined with a lot of power-ups, you know this will be one tough fight.
Mega Man V has Terra, who is the only being to canonically defeat Mega Man. If that wasn't bad enough, the final boss, Sunstar, has no weaknesses and three forms.
The overly darker and edgier Super Adventure Rockman'sgame over scenes. In the normal one, you watch helplessly as Roll dies, and Mega and Dr. Light hug in their last moments before Wily takes over the world. In the ending you get if you lose to the final boss, it electrocutes everyone, including Wily, to death.
Frost Man's ultimate goal in Mega Man 8 is to turn Mega Man into an ice pop (or a Kakigori in the Japanese version) and eat him.
In Mega Man & Bass, King proves he's not messing around by bisecting Proto Man with an axe.
Bass's solo ending in Power Fighters. As he mocks Dr. Wily, saying that he must have only created him by accident, Wily suddenly becomes oddly calm and states that he's right; Bass was a fluke. he then, with that same eerie calm, reveals a silhouetted robot, outright telling Bass that he made a special robot to kill all of his enemies—Bass included. Bass retorts in saying that such a "girly-looking robot" had no chance of beating him. Wily just tells him to prepare himself and departs, cackling maniacally. Bass is actually frightened, or at the very least very unnerved, at just how unhinged his creator is becoming. This is emphasized when you remember that, the last time Wily told Bass this, he didn't dare show him the robot in question; he just threw a tantrum like he usually did.
The implication here may be Wily's well aware just what kind of monster he's making here, and just what hewas capable of. And he is positively giddy about it.
Mega Man 9 has the fact that the game's Robot Masters were still active when Wily finds them in the scrap heap.
Mega Man 10's Endless Stage music; the echoes in the music sound eerily similar to what happens if Mega Man dies in the games.
What if we corrupt Mega Man 3? Or just use a LUA Script that isn't meant for it? MEGA MAN GOES TO HELL!
What happens to the Servbots in so many battles (especially the first game) could really horrify people. The best example being the battle on the submarine (can't remember the name of the battle), when you're blowing up Bonne subs. With Servbots inside. Sure, they're "immortal" and we do see that they're okay later on, but until you do...
If you play Legends and stay on the title screen then servbots walk past. Sometimes they're paper-thin!
Pretty much all of the dungeons in the Legends games have some Nightmare Fuel, especially the isolation.
The first boss in the game can be pretty scary for a kid. Not the boss design itself but how you're at the end of a long dark hallway, and you can just barely see a Reaverbot shooting you with rockets, and slowly inching it's way closer with absolutely no room to get behind him. You can kill him before he gets close though but still.
The sequel is not to be underestimated either. Forbidden Island has Reaverbots that suddenly grow giant skull-shaped heads when they attack you, and one of the dungeons has a giant skeletal Reaverbot menacing you, even suddenly crashing through a wall several times.
At the end of ZX you realize the basic plot stems from Japanese horror. Then early in the sequel ZX Advent there's the Tower of Verdure mission; you're trapped in a tower with a haywire security system while also being assaulted by a variety of weird plant monsters. This is only slightly creepy, but it leads up to the boss, Rospark the Floroid. Pretty much everything this guy says, along with his voice, is seriously freaky. Of special note is "Come and cry in my bosom. Cry out in terror and pain!" And then, immediately after that fight, you have yet another encounter with the soul-sucking Artifact of Doom from the end of the first game.
Siarnaq. He is so not trusting of everything and traumatized by his past that he speaks in a monotone robotic voice. His personality, emotions and empathy have been completely removed just by whatever happened to him, leaving just his intelligence. Well, it's not entirely gone. He still has a little emotion left, only shown after he kills you.
The final sequence of the first game. People Jars, Was Once a Man...and all of them more or less killed to power Model W. And then you get to kill it...and possibly them, too.
And to top it all off, Dr. Weil may have had a hand in it as well.
In a flashback during the first episode detailing Rock and Roll's creation, Dr. Wily had them strapped to an operating table to reprogram them. Via an electric drill to their heads. While they were awake. Complete with both of them struggling. It's the robot equivalent of a lobotomy, and we see the drill approaching from Rock's point of view.
Wily's line as he approaches Rock and Roll with the drill is unsettling.
Wily: A little tuck here, a little slice there, and you'll soon feel differently about this!
Also in "The Beginning", Wily warned Light not to follow him after he kidnapped Rock and Roll. If he did, Ice Man would freeze him and Cut Man would slice him up.
Wily's plans in "The Big Shake" and "The Day The Moon Fell" both involve causing extreme natural disasters, via earthquakes in the former and pulling the moon out of its orbit in the latter. They're played completely seriously.
Wily: I will create chaos! Destroy everything! Mankind will beg me to take over!
In "Electric Nightmare," Roll is battling a female cosmetics robot who gave her a bad facial. It's a fast fight, and cartoony until the end. Roll uses a buzzsaw to slice the robot in half across her stomach, her upper half falls to the floor, and then Roll vacuums her face off.
The episode "Curse of The Lion Men" were not well-received, but they have one moment of genuine scariness. After zapping Dr. Light with his mind controlling lionizing Eye Beams, Tar turns his attention to Wily and turns him into a lion man as well. He then frisks him for his reprogramming device and zaps the Robot Masters with it, including Proto Man and Roll, turning them all loyal to him.
Proto Man: *strained* You...are...our leader...Tar!
Mega and Rush are about to be ground up at a salmon-canning company. They actually show the salmon hitting the saw blades.
The image of Rock/Mega on a lab table as a Terminator-esque endoskeleton in the intro is a little unnerving, even though it only shows up for a few seconds before dissolving into an image of Mega from that same position but with his "skin."
And there's the first nightmare in "Mega Dreams"; while the idea of Guts Man and Cut Man pretending to be a couple may amuse you, that moment comes after a shot of a stuffed dino with what looks like blood on its muzzle.
In "Brain Bots", Wily places Mega Man in a Death Trap. The trap consists of a Descending Ceiling with spikes. Unlike some death traps, Mega was bound to the floor as it descended. What pushes this into Nightmare Fuel is what Wily said about it; he uses it to recycle robots he no longer needs into scrap metal. Meaning he's done this to his own robots.
What makes it worse is that some robots, like Fire Man and Star Man, were only in one episode and never seen or mentioned again.
Some of Cut Man's lines fall under this. His Peter Lorre-esque voice makes it worse.
Cut Man: I'll give them haircuts...from the neck up!
In "Mega X", the amount of destruction caused by Wily's superlaser. It vaporizes the surrounding landscape and makes Wily think he did the same to both Mega Man and X.
Vile and Spark Mandrill are pretty scary, as they're completely unstoppable until X arrives to even the odds—and even he has trouble with them.
In "Bro Bots", Proto Man's revelation as the Heel Face Mole is met with resistance. How does he control the heroes? By threatening to shoot the governor in the face.
Proto Man: Power down, or I'll give Deacon a plasma shave!
In the same episode, Mega Man stumbles onto Wily's plan to create robot doubles of elected officials and control the city with them by finding a copy of Dr. Light. And given Wily had both Light and the governor suspended over a pit of acid, he may have been going for a Kill and Replace scenario.
Sometimes the Robot Masters (and Rush) are literally blown to pieces. This isn't too bad until one episode showed Roll in pieces, invoking the Uncanny Valley as Mega Man picks up her head to talk with it.
The show often used acid as a weapon, one time weaponizing acid rain; some kids became convinced that they'd die in an acid rain storm.
While the episode involving Mega Man and other robots "devolving" may be ludicrous (robots don't turn into caveman-like robots), it was still freaky seeing their gradual transformation.
"Bot Transfer" has Mega Man and Snake Man swapping bodies, with an appropriately panicked reaction from the former. Their voices aren't mental, so Mega Man is stuck with a snake's hiss as well as his body, and completely unable to get help; worse, his family doesn't suspect the "real" Mega Man until the last second.
A lot of bad guys get broken into pieces (along the torso joints), including Fire Man being pulled apart by Roll's vacuum or someone getting bitten apart by Snake Man's weapon. Crystal Man gets his arm blown off at the elbow, and is still walking around like that until the end of the episode, and at one point Dark Man is reduced to a torso, half an arm, and his head, and he's STILL COMPLETELY AWARE OF THIS, even having to drag/hop around because no one will carry him when they run away at the end. Imagine if they did this to people for a second.
Adding to this are the small shots showing the full implications of a worldwide blackout. Examples shown are appliances and handheld devices failing, a ship being stranded at sea, cars crashing, an airplane diving out of the sky, and power going out at a hospital in the middle of surgery. It's safe to write off anyone who was on life support devices at the time.
Before that happens, we see Ra Moon invading Wily's mind and showing him how he came to Earth. Manipulating a primitive society into seeing him as a god, which included among another thing, sacrifices to him. Even worse he caused the civilization to war with each other and eventually wiped out the society altogether. Why? They weren't suiting his needs quick enough. Oh but wait it gets better. He reveals to Willy that he'll make his EMP so strong that it'll soon be able to affect humans and melt their brains. Anyone left after that he predicts will turn on and kill one another. And he's doing all just because he can. Just...damn!
What happened to Sonic's world after the crossover, there's the thought that the very SAME could've happened to Mega Man's world if he was interrupted.
Pedro's flashback of his exploration team heading to the pyramids where Ra Moon lied. They figured it would just be a quick excavation, in and out. However once they were in range, the EMP field crashed their helicopter. Pedro lived but lost an arm and the rest of his team presumably were killed when they tried to investigate the pyramids. -Shudders-
Nothing ambiguous there, there are a lot of bodies with white sheets over them visible.
Also mixed in with Tear Jerker, following Ra Moon's death, Blues—sorry, Break Man goes to Quake Woman to try and get some answers as to why on Earth she would forgive Dr. La Linde for taking her emotions. Unfortunately, she doesn't tell him what he wants to hear. When she begins to question him in turn, asking if he can't forgive Dr. Light for what could have happened rather than what did, we finally see what's really eating him, in a frankly terrifying burst of unbridled fury.
Tempo: "Is the problem that you cannot forgive him for nothing?"
Blues: *drives his fist into the wall, barely missing her head.* "HE REPLACED ME!!!"
Dr. Cossack is becoming quite the hindrance to Dr. Wily's plan to trick the world beliving he's innocent. Wily uses Kalinka's trauma of the Ra Moon's events to make him mad. Who played the games know it will end into kidnapping, that can't be good for the little girl or for the very worried father.
Wily in his crazier moments. He orders Copy-Mega Man to throw Roll out of Skull Fortres.
In Novas Aventuras De Megaman, Holzenbein specializes in robots. Said robots are made from homeless girls who were unfortunate enough to cross paths with them; they're held in a dark confinement area until it's their turn to be roboticized. Roll, or whatever her name was before Dr. Light saved her, was tricked into thinking that she'd simply be brought back to the park, this time among people who wouldn't smack her face off for playing with their kids. The next time we see her, she's been ripped apart and decapitated, her head (brain now exposed) sitting on a table as Wily talks about how she's the prototype for their newest humanoid computers. It would merely be "Persocoms, but horrible" if it weren't explicitly stated immediately afterward that most of these robots are forced into slavery—either in the Amazon as workers, or the "Suspended Cities" as prostitutes. Later on, we see more victims of this process, one of whom seems to be fully aware that she's de-limbed and floating in a culture capsule.
#12's cover and conclusion. Forget the nudity; those wires look rather invasive...Oh, and the gang is now at the mercy of this continuity's version of Proto Man.