YMMV / Mega Man X4

  • Ensemble Darkhorse: Two stand out in the entire cast:
    • Iris only appeared in one game in the main series, but fans tend to squee whenever she reappears. This has apparently prompted her re-appearing in Mega Man X-Treme 2 and as a NPC in Project X-Zone.
    • Magma Dragoon, for being a Bad Ass Blood Knight. Bonus points for being a Shout-Out to Akuma.
  • Funny Moments: In Slash Beast's stage, the first repliforce mook that destroys the train connectors also falls into the pit he created.
  • Game Breaker: The Force Armor in general, but especially the head component, which gives you unlimited ammo for your weapons. Charged attacks still drain your energy, but the charged attacks are generally considered to be overkill anyway, and the ability to spam the normal versions of the attacks with impunity is far more practical.
  • Goddamned Boss: Sigma has three phases in this game. The first one can be resolved quickly when you use fire attacks. The second one relies on manipulating his scythe so he goes for an easier to avoid attack. The final form has three forms he cycles through: A gun form that takes its sweet time lining up shots, and a garbage form that sucks in debris from random angles and blows you towards Spikes Of Doom. There is also another form consisting of Fire, Ice, Lightning heads that Beam Spam and cannot be permanently destroyed. With only two energy tanks it's clear Sigma's strategy is to just stall for time and hide his weakpoints for as long as possible. Makes sense, since he's activating Final Weapon.
  • Good Bad Bugs:
    • Colonel's Sword Beam flurry has an odd blind spot: right in front of him. Apparently you can stand right in front of him and not get hit.
    • Zero's Slash Dash Cancel started here. You can Lag Cancel the first slash, and cancel the sword cancel with a dash. You can then cancel the dash with a slash. With proper timing, Zero won't move from his spot and will just Blade Spam. Bosses don't trigger Mercy Invincibility until Zero completes his combo, so Zero can shred most bosses in about 4 seconds. The only exceptions are airborne bosses or Zero getting hit. Mega Man X6 forced lag after enough cancels to try to fix it but it's still effective in X4, X5 and X6.
  • Growing the Beard: It was with this game where the X series' stories got more complex, the levels got bigger and more elaborate, and Zero's sword-based playstyle was introduced.
  • Ho Yay: Its very subtle, but Colonel and Iris used to be a single reploid made to be a clone of X, but due to complications was split into two reploids, Colonel retaining X's combat prowess and sense of justice, and Iris retaining X's compassion and pacifism. That's right, Zero's official love interest in this series is basically a version of X that can't fight.
  • Magnificent Bastard: Sigma with his trick manipulating the Repliforce, which he pulled off without the Maverick Hunters having any idea he was involved. The plan to hijack Repliforce's Kill Sat nearly works in spite of X and Zero's involvement only being thwarted by a last minute Heroic Sacrifice by General.
  • Memetic Mutation: WHATAMIFIGHTINGFOOOOOOOOOOORRRRR!?!?!?!?!?
  • Narm: Zero's meltdown after Iris' death, in the English version. See Memetic Mutation above.
    • The English voice-acting in general is so "poorly dubbed eighties anime" it hurts. X's voice is uncharacteristically feminine, Zero is completely miscast as an energetic, nasally airhead who constantly sounds out of breath, General and Colonel have no emotion whatsoever, and Sigma sounds like a stock Saturday morning cartoon villain with a a bad head cold.
  • Narm Charm: Given the series increased Shonen influences as it progressed, the hammy acting feels downright appropriate in places. And despite how fun it is to make fun of, Iris' boss fight and resulting death are still effective at making the player want to storm Repliforce's base.
  • Strangled by the Red String: Zero and Iris together don't have much screentime to suggest that they're attracted to each other, at least not until the latter's death. Xtreme 2, which is a prequel in which Iris appears, doesn't give much hints either.
  • Surprisingly Improved Sequel: Though fandom is divided as to whether this game is better than X1, nearly everyone will admit that it's a major step-up in quality over X2 and X3.
  • That One Boss
    • Magma Dragoon comes to mind first. You can bring a Ride Armor to the fight with him is probably lampshades how tough he is. His fireballs are surprising fast for Zero to avoid, and his jump kick and Breath Weapon ensure X needs to stay relatively close to react properly. His Desperation Attack is a Meteor Swarm that is very hard to react to while he's shooting more fire everywhere. The ability for Zero that works against him is Raijingeki - which is hard to pull off considering Dragoon's agility. It doesn't stun him either, unlike X's Double Cyclone. Your first time through will likely hit a roadblock during the Boss Rush, because you don't get a Ride Armor there.
    • Fight Storm Owl without Aiming Laser. He has a surprising number of attacks that come in from different angles and it's easy to get trapped. He flies around the arena and quickly leaves or raises a barrier when hit, so he isn't vulnerable most of the time. It's even worse with Zero, who has to get close without getting hit himself. Zero's Rakuhouha deals extra damage and stuns Storm Owl immediately, but the ammo is so limited it's best used as a panic button to avoid traps, rather than actually deal damage.
  • Unintentionally Unsympathetic:
    • Magma Dragoon's death is presented as a tragedy because he just wanted a fight with X/Zero... but he goaded them into fighting him by crashing Sky Lagoon, killing thousands of innocent people, and gloats about it when X confronts him, making it kind of hard to share X's sentiment.
    • It's obvious that as an audience we're meant to feel bad for Repliforce because they were tricked by Sigma and unfairly labeled Mavericks by the government ... however, their actions really don't paint them in the best light. After a national disaster Colonel refuses to disarm and come in for question because he assumes Repliforce should just be assumed innocent due to the good they've done in the past, and then the Repliforce leader, General, decides to launch a coup and declare themselves an independent state that only allows Reploids and not humans. It only makes sense at this point that the government would label them as Mavericks (Repliforce just refused to follow the law after a huge disaster and pretty much declared a civil war, even if they wanted it to be done peacefully), but then Repliforce plans on heading off-world on a huge satellite ... a satellite with a giant Wave Motion Gun pointed down no less, while various members of Repliforce start launching organized attacks on innocent civilians to try and buy time for Repliforce to launch their shuttle. And again, based on the ending of this game and the attitude towards Repliforce in Mega Man X5 we're supposed to view them as sympathetic.
  • Vindicated by History: While fairly well received at launch, it got a significant amount of criticism from critics for sticking to 2D sprite-based graphics at a time when everyone was pushing for 3D, as well as being too similar to it's predecessors. Today it's one of the most popular games in the series for it's refinements and new features (namely Zero) and has stood the test of time incredibly well as a result of it's 2D graphics and gameplay, coming from an era when most franchises were hitting the Polygon Ceiling.
  • What an Idiot:
    • When the Sky Lagoon crashes into the Earth, Colonel could have went along with the investigation and clarified that the crash wasn't their doing, or if he felt that any investigation would be unfairly biased, clearly state this. But he says that warriors don't disarm and leads to his entire army being branded as Mavericks.
    • Sigma seems to be the only smart person in this plot, as he played everyone into the Honor Before Reason trap and only lost because X and Zero could beat him in a fight and General was functional enough to perform a Heroic Sacrifice.