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.
Demonic Spiders: Sharukurusu in both games - they run fast, hit hard, and can leap to avoid shots. They also appear in packs, so you may be blasting away at one and fail to hear the clanking footsteps until its friend impales you. And in the first game, there's even an invisible version that only reveals itself when it's just about to impale you.
Firushudot are exclusive to one corridor in the first game, but they carry long-range sonic beam tech and are horrendously powerful even against beefed-up armor and firepower. And, again, they tend to pop out of the walls in groups. Your best bet is to either walk slowly or run like hell.
From the second game, FUCKING SHOEBAFUN. Only found in two levels in the second game, but easily the most paranoia-inducing reaverbots. Floor masters that pop out at random and eat you alive, and the only way to escape them is either jumping at exactly the moment you see one coming up or through some serious button mashing once it's got you.
Ear Worm: The Servbot/Kobun Training Theme in Misadventures.
Ensemble Darkhorse: The Bonne Family Pirates, especially the Servbots. To wit: they got an entire Gaiden Game starring them (namely Tron and her cadre of Servbots) and Tron and the Servbots made the cut twice for the Marvel vs. Capcom series, first in 2 where Tron and a Servbot are playable, and then in 3, the Kattelox Island stage features Teisel, Tron, and a lot of Servbots. Heck, Tron was announced as playable for Marvel Vs Capcom 3 before any other Mega Man character, and, along with Zero, another fellow Ensemble Darkhorse, they are the only representative in the game.
Game Breaker: The drill arm's near-zero range and inability to use while moving make it highly impractical to use as an offensive weapon, so most players will only use it for its wall-breaking utility. However, it has the highest attack power of any weapon in the game, and infinite energy. So if you come up on a enemy/boss that doesn't move around very much, you can do stuff like this.
The Shining Laser costs a hell of a lot of money to fully upgrade, but once you do, it can kill anything, anything, in two seconds. This includes the final boss.
Genius Bonus: The Gesellschaft and Gemeinschaft are sociology terms. Gesellschaft can be summed up as "rich and socially isolated from family" and Gemeinschaft can be "poor but a close family." The former is a large airship and the latter is a comparatively tiny rail-car, both owned by the Bonnes and reflect their current financial status (though "close family" here can mean that they are physically crammed close together).
Good Bad Bugs: In the second game. There is a bug where holding down the fire button and pressing forward quickly and repeatedly allowed you to rapid-fire the buster regardless of its Rapid stat. This is very useful for the S Class Digger Test.
Hate Dumb: Capcom recently released screenshots of a Legends 3 prototype/prologue featuring Barret, the aforementioned fan-voted character, as the main protagonist. Cue hundreds of cries of "No Mega Man? Ruined FOREVER" after completely ignoring the fact that it's supposed to be a prologue to Legends 3. And that's not even going into the ignoramuses who thought Barret WAS Mega Man.
Slowly but surely, the hatred for Capcom as a result cancelling the third game is starting to look like this, to the point of wishing Capcom actually goes bankrupt because of it.
Worth noting that not only did Capcom give the fans false hope (at least according to the fans; they did hype the game up quite a bit), they didn't really explain why it was canceled (just that it "didn't meet criteria"). Plus, that Prototype version that was meant to test sales? Also canned.
One of the first casualties resulting from the backdraft was Capcom's livestreaming of Ultimate Marvel vs. Capcom 3 the day before the San Diego Comic Con. The stream's chat was instantly flooded with people chanting "LEGENDS 3! LEGENDS 3!" to the point that Capcom had to shut down the broadcast due to the spam.
It's also not exactly the firststrikeformany Capcom fans in recent days.
Launcher of a Thousand Ships: Mega Man Volnutt. He is coupled with any girl in the Legends series. Yes, he is even coupled with the supporting and minor female characters.
Memetic Mutation: Not as prominent as some memes, but there's a joke among fans of the series that Mega Man underwent "reverse puberty" between games 1 and 2, due to a change in voice actors making him suddenly sound younger.
"Legends Never Die" - the common chant for the MML3 supporters after the news of its cancellation.
Nightmare Fuel: Pretty much all the ruins in the first game, as well as all the Bonne's strongest robots (Tron's giant spider robot, the Feldynaught is a standout example). The second game's ruins are pretty scary too, although special mention goes to the Saul Kada Ruins.
This article would be remiss if it did not mention thismusic:
That horrible buzzing sound your alarm makes when Reaverbots are nearby is guaranteed to make you jump. Every single time. Thankfully, it was removed in the sequel.
Capcom's reputation after cancelling the 3rd game. The impact of this cancellation has hit some fans so hard that they have lost their respect for Capcom, and swore to never buy any their products, again.
It doesn't help that Capcom's response to the outrage is to blame the fans for not showing interest. Note that they didn't say that the devroom was being used to gauge fan interest (so most people were content to just lurk and follow its development) and that they never released the prototype that they said they were going to use to gauge fan interest.
To put things into perspective, they took second place in a recent Gamefaqs poll about the most hated developer, almost tying with "evil empire" Activision.
Scrappy Level: The S Class Digger test in the second game.
The Technical Course minigame in the first.
Ship-to-Ship Combat: The fanbase is split almost directly down the middle on whether Megs should be with Roll or Tron.
And lord knows what he's been up to with Yuna and Sera in the real time following the ending of Legends 2. Suffice to say that some of the Ship To Ship Combat in the fandom revolves not around which girl Mega Man should take, but whether or not he should take all of them.
Surprisingly Improved Sequel: The first was in no way bad, but it's amazing how much a simple thing like being able to move while locked on to a target can improve an experience.
Arguably Tron Bonne's moment, early in Legends 2, when having attacked Mega Man while running a radio jammer to cut off Roll's comms, and a voice manipulator to impersonate her, tried to make him switch sides and stay with her instead. And then gets a really painful moment when the whole plan collapses and she has to sit, rather bashed about and ignored amidst her destroyed vehicle, listening to Mega Man and Roll chattering soul-mate-ish over their restored radio link.
Most definitely directly after the final battle with Sera, as she begins to realize how her severe adherence to the System made the Master sad, a revelation that brings out her own emotions of sadness. Oh, and she's realizing this as she's dying. She gets better, thanks to Yuna letting her inhabit her shell.
That One Boss: Yakuto Krabbe, Tron's crab-like machine in Legends 2. And considering it's one of the earliest bosses where you will have little in terms of upgraded weaponry, it's a hell of a Wake Up Call Boss.
Yank the Dog's Chain: Capcom announces that there will be a Legends 3 after all. Capcom involve the fandom in a good deal of the development. Capcom decides that there is no fan interest and cans the entire project without releasing the demo.