The Japan-only sourcebook Compendium of Rockman X includes Boss Files on every boss from Mega Man X to Mega Man X7. The book has never been officially translated into English, so this page features fan translations done by volunteers at the Mega Man Wiki.
A Reploid designed for cold regions, formerly of the 13th Polar Unit. He destroyed the Reploid who was his superior and escaped to join Sigma's rebellion. He specializes in ice attacks and snowstorms.
Attack:
Effect:
Shotgun Ice
Spits several horizontal ice shots in a row.
Ice Sculpture
Creates two ice statues. If the breath hits X, it freezes him too.
Blizzard
Hangs from the ceiling, causing a snowstorm that pushes any remaining ice sculptures.
A Reploid from the same 17th Unit as X. When his commander Sigma rebelled, he simply followed him. He shuts down the power plant to secure an exclusive energy supply.
Attack:
Effect:
Dash Punch
Punch attack that moves forwards. Flinches if hit by a Charge Shot.
Electric Spark
Electric discharge that travels along the floor and walls.
Ceiling Climb
Moves by hanging from the ceiling and climbing across the arena.
Former commander of 8th Armored Unit. He is a warrior with a durable skin who unconditionally follows the orders of his superiors. When he joined Sigma, he relinquished command of his Hunter unit and took over a mine for its mineral resources.
Attack:
Effect:
Tackle
Rolls up his body and dashes, bouncing off of surfaces.
Rapid-Fire Shot
Fires several shots from the cannon on his head.
Guard
Protects himself from Charge Shots, then counterattacks with a spread shot.
A Reploid from the 6th Naval Unit. He always disliked protecting the humans because of their weakness, and after sympathizing with Sigma he ended up participating in the rebellion. He attacks maritime cities and blocks shipping routes.
Attack:
Effect:
Homing Torpedo
Launches missiles consecutively.
Piranha
Shoots four homing piranhas.
Whirlpool
Creates a whirlpool, pulling X close so he can steal his Life Energy.
A Reploid from the 9th Special Unit (Rangers). Despite his skills, he could never become a commander due to his bad reputation, so he saw the rebellion as an opportunity to take revenge. He is in charge of security at a front-line base.
Attack:
Effect:
Chameleon Sting
Fires shots in 3 directions from the tip of his tail.
Transparent Movement
Moves while invisible, making him invincible until he reappears.
Tongue Flick Attack
Approaches and extends his tongue to hit X.
Thorn Rain
Summons a rain of thorns from the top of the arena.
Commander of the 7th Airborne Unit. He initially fought against the rebel forces, but after losing in a confrontation with Sigma, he was subjugated. He took over an airport with a new type of aerial warship to block trade routes.
Commander of the 4th Land Unit. He participated in Sigma's rebellion to show off the full extent of his power. He controls a factory district, working to transform it into a large-scale weapons factory.
Attack:
Effect:
Earthquake
When landing from a jump, the tremor makes X fall to the floor.
Flame
Shoots fire from his buster.
Oil
Places oil on the floor, which burns if lit by a flame.
An SA-Class Maverick Hunter who was part of the 17th Unit, but was arrested for a dangerous abnormality in his electronic brain. Thanks to Sigma's rebellion, he is now free to cause as much destruction as he wants.
Attack:
Effect:
Dash Attack
Dashes at high speed.
Head Bomb
Drops a bomb above X's head, which splits along the floor.
Electroshock Shot
Fires a lightning ball from his shoulder cannon. If it hits X, it paralyzes him.
The guardian waiting at the end of Sigma Stage 1. It crawls along its webs at high speeds to devour all intruders. Its body is covered with durable armor, but it shows its weak point immediately after attacking.
Attack:
Effect:
Tackle
Follows the route of the webs to crush X.
Mini Spiders
Scatters four Petitpiders, which then climb the walls.
The guardian of Sigma Stage 2. Resembling a giant mural, the right eye, left eye, and nose all attack independently. It is a dangerous enemy, due to the instant death spikes in its chamber.
The guardian of Sigma Stage 3, a huge Mechaniloid resembling the head of a dinosaur. It is split into two parts, top and bottom, which attack independently. It moves quickly despite its large body.
Sigma's faithful pet and one of his most trusted guardians. Using agile movements that are difficult to follow, it violently attacks intruders with flames and electricity.
Commander of the 17th Unit, and former senior officer of X. He was said to be the strongest Reploid in history due to his immense combat power and brilliant mind, but one day, he suddenly chose to eradicate humanity and started a rebellion.
The form Sigma adopts when his humanoid body is destroyed, now unleashing his true power. It is the strongest Maverick yet, attacking with excessive destructive power and an iron-wall defense that can only be penetrated by certain attacks.
Attack:
Effect:
Punch
Fist attack aimed at X.
Electroshock
Lightning balls that travel along the floor and walls.
Flamethrower
Flamethrower aimed downwards.
Consecutive Shots
Fires nine rounds of energy shots.
Hand Electroshock
Discharges lightning above and below one hand.
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Mega Man X2
Mega Man X2 has 18 Boss Files in the book (pages 36-43).
A Mechaniloid that was being manufactured in a Maverick factory to conquer cities around the globe. Its enormous body may be intimidating, but its weight forces it to move slowly.
Affiliated unit unknown. He has a quiet personality and often stays in his shell. He controls an Energen Crystal mine, which can generate tons of energy from small amounts of crystals.
Attack:
Effect:
Crystal Hunter
Fires shots in 3 directions, which petrify X if he is hit.
He once belonged to the 7th Airborne Unit, but lost his ability to fly in an accident and retired from the Hunters. However, Sigma became interested in his impressive foot speed and recruited him as a soldier. He now controls a missile base.
Attack:
Effect:
Charge
Runs towards X.
Step
Runs forwards while jumping.
Sonic Slicer (Lateral)
Fires a single cutter aimed at X.
Sonic Slicer (Overhead)
Rains down five cutters from the sky.
High Jump
Leaps from the background to the foreground, landing on top of X.
Affiliation unknown. Intel indicates that he is one of the Reploids constructed in Sigma's factories. With a cheerful disposition, he loves to dance, and carelessly changes the weather while occupying the climate control center.
Attack:
Effect:
Strike Chain
Extends his chain horizontally. If it hits a wall, he is pulled him towards it.
Hanging
Hangs from the ceiling and scatters seeds. The seeds germinate into spikes when they land on a surface.
Lightning Strike
Turns red and summons three lightning bolts. He is invincible for the duration of this attack.
Chain Spin
Spins his chain at high speed, repelling X's attacks.
A former member of the 6th Naval Unit with a violent personality. Because he often injured his comrades, he was betrayed and persecuted as a criminal. As a servant of Sigma, he now relishes in destruction behind the wheel of a giant dinosaur tank.
Attack:
Effect:
Spin Wheel (Underwater)
Shoots a wheel while underwater, which climbs around the arena and falls.
Spin Wheel (Above Water)
Shoots 2 wheels while above water, which bounce off the water's surface.
Biting
Suddenly emerges from the water to bite X, continuously damaging him until he escapes.
Shot Devour
Swallows X's shots and fires them back at him.
Charge
Spins his body and charges forwards. When he hits a wall, the impact site becomes damaged.
Formerly part of the 6th Naval Unit. He was never on good terms with his colleague Wheel Gator, but became a servant of Sigma anyway, seeing it as a chance to strike it rich. He is in charge of transporting Mavericks from his submarine base.
Attack:
Effect:
Mini Crabs
Disperses small crabs in bubbles.
Vertical Jump
Attacks with his pincers if X is above his head.
Bubble Splash
Shoot a bubble shot horizontally.
Mini Crab Scatter
Scatters a large number of small crabs.
Bubble Barrier
Surrounds his body in a bubble to avoid X's attacks.
A former colleague of X's in the 17th Unit. He has concocted a plan to take control of a volcano and cover the whole Earth with ash, blocking the sun to plunge the planet into a new ice age.
Attack:
Effect:
Speed Burner (Tackle)
Dashes coated in flames, sometimes ending in an uppercut.
Speed Burner (Projectile)
Throws two fireballs, one low and one high.
Triangle Kick
Wall kicks up the arena walls, then returns to the bottom.
Super Mode
Once he has lost half his health, his flames turn blue and his attack speed increases.
Affiliation unknown. He has the special ability to grow by absorbing the scrap metal of other robots. His junkyard factory constructs Mavericks out of scrap metal.
Attack:
Effect:
Scrap-Scatter
Throws scrap while swinging from the ceiling.
Dash Scrap-Scatter
Throws scrap while dashing on the ground from side to side.
Formerly part of the Special 0 Unit, but he was brainwashed by Sigma. Now he is a cold-blooded individual who will even sacrifice his allies in order to fulfill his mission. He uses a super computer to spread the Maverick Virus.
Attack:
Effect:
Maverick Virus
Pulls X in, sealing first his Charge Shot, then his dash, and then his jump.
Magnet Mine
The end of his tail surrounds X, attacks, and returns.
He has terrifying power, once ransacking an entire Hunter base on his own. However, his electronic cortex is incomplete because only brute strength was emphasized in his design.
He resembles a legendary mad scientist who once plunged the world into fear. With a cold and calculating mind, it's rumored that his thought cortex surpasses even that of Sigma.
Attack:
Effect:
Ring Laser
Jumps high and shoots ring lasers around the arena.
He unleashes sword techniques with great skill, and it's said that no one has faced him and survived. He is responsible for infiltration into enemy territory.
Attack:
Effect:
Charge
Dashes while slashing with his sword, moving from one side to the other.
A Violen who has unleashed his true power and become even more ferocious. All intruders are brutally crushed by his iron ball that has been sharpened with new variations to its attacks.
Attack:
Effect:
Hammer Attack 1
Swings his hammer like a pendulum. The path changes when it bounces off a block.
Hammer Attack 2
Swings his hammer straight at X. The path changes when it bounces off a block.
Agile in a new flight form; apart from the face in the center of his fuselage, there is no trace of his original appearance. He reshapes the battlefield to limit movement, while firing electric shocks and missiles.
Attack:
Effect:
Block + Electric Shock
Extends blocks horizontally and then drops them, at the same time creating electric shocks.
Zero, reassembled from the parts reconstructed by the X-Hunters. His impressive fighting power is now turned on X. Has he really become a Maverick servant of Sigma...?
Attack:
Effect:
Z-Buster
Fires a single shot.
Charge Shot
Fires two Charge Shots and then a shockwave from his saber.
Dash Attack
Dashes towards X.
Earth Gaizer
Launches two to six stones around himself, which can hit aerial enemies.
The most powerful Reploid of all time, created by Dr. Cain. Half a year ago, he started a rebellion against humanity and fell at the hands of X, but he has since been revived by the X-Hunters.
Attack:
Effect:
Claw Attack
Dashes towards X and slashes with his claws.
Air Claw Attack
After a triangle kick, he disappears and then attacks X from above.
Sigma has lost his Reploid body and entered an energy-based form. As a result, he has broken free from the shackles of an imperfect body and floats freely in the air to attack.
Attack:
Effect:
Heat Ray
Fires a heat ray while moving.
Minion Summon
Summons Fishern, Tiranos, Scriver, or Tubamail-S.
Tackle
Surrounds X, inflicting continuous damage.
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Mega Man X3
Mega Man X3 has 19 Boss Files in the book (pages 50-57).
A giant humanoid Mechaniloid found on the roof of the Maverick Hunter headquarters. The blows from the iron balls on its arms are strong enough to easily destroy the building's exterior.
Attack:
Effect:
Vertical Iron Ball
Moves an iron ball vertically downwards, often in succession.
A Reploid made to mine Energen Crystals, which serve as the main power source of Reploids. He was once a diligent craftsman, but now his mining drills cause massive destruction.
Attack:
Effect:
Charge 1
Dashes towards X.
Charge 2
Dashes faster as his body changes color. Used once he is at half health.
Built with a high-voltage power generator in his body, he was a Reploid used as a mobile power station in emergencies. His personality suddenly changed in this recent incident and he took over the energy management center.
Attack:
Effect:
Electric Shot
Shoots an electric ball along the wall.
Mine
Launches mines in X's direction, sends electric shots to them, and then sucks them in.
He was developed as a combat Reploid, but was locked away due to his dangerous personality which failed to distinguish between enemies and allies. He has been released, and now occupies the shipyard.
A poacher hunter made to protect endangered wild animals from the hands of poachers. He uses solar light as an energy source, giving him unlimited power.
Attack:
Effect:
Dive Attack
Lunges at X from atop the wall.
Ray Splasher 1
Fires five light shots while hanging on the wall.
Ray Splasher 2
After Dive Attack, he fires five light shots on the ground.
A former member of the 17th Elite Unit, he is the younger brother of Boomer Kuwanger from Mega Man X. He holds a grudge against X, who destroyed his brother, and abandoned his unit to join Dr. Doppler's rebellion.
Attack:
Effect:
Gravity Well
A large shot that reflects off of walls. Once he's lost half his health, he charges it up.
Vice-captain of the Special 0 Unit. His commander, Zero, was invited to Dopple Town by Dr. Doppler. Since Zero was busy, he went in his place, but he was turned into a Maverick.
Attack:
Effect:
Stinger Attack
Extends a stinger from his abdomen and dashes.
Mini Bee Summon
Shoots small bee bombs.
Search Attack
After locking onto X with a cursor, he shoots a large amount of bee bombs.
A Reploid built for ski maintenance. He used to have a kind, artistic personality. His performance in cold weather is outstanding, and he can smash X with his powerful dash and freezing attacks.
Attack:
Effect:
Charge
When his horns shine, he moves faster and smashes X against the wall with his horns.
Ice Shot
Fires ice shots, which can be destroyed.
Freeze Beam
Shoots a freeze ray forwards. When hit by it, X freezes and can't move.
A Reploid of unknown affiliation. His entire body is made from a fluid metal called "Liquid Metal" and can disappear into the floor or the ceiling. He occupies a dam which is the water source for a metropolis.
Attack:
Effect:
Acid Burst
Shoots an acid shot that bounces off walls. It can be canceled with attacks.
Bouncing Acid Shot
Shoots two acid shots that bounce along the ground.
Liquidize
Melts and disappears into the floor. After solidifying, he always jumps first.
A high-performance Reploid who is Dr. Doppler's right-hand-man. He was based on powerful Reploids from around the world, and his abilities were designed to emphasize speed over strength.
Attack:
Effect:
Charge
Aims at X and dashes at him, even from midair.
Homing Shot
Fires a homing shot that chases X.
Ring
Shoots a ring. If it hits X, he is immobilized for a while.
A Reploid who reports directly to Dr. Doppler. He emphasizes strength over speed. Along with Bit, he is in charge of commanding Mavericks in several locations.
A Reploid who was destroyed by X during Sigma's rebellion. He has been revived from the depths of hell to seek revenge, and stands in X's way once more.
Attack:
Effect:
Dash Punch
Moves his Ride Armor in front of X and punches with its fist.
A different Ride Armor than the one that appeared in the Vile Stage. One could say that Vile's obsession with getting revenge on X is, in a sense, his most human aspect.
Attack:
Effect:
Dash Punch
Dashes with a punch, which shakes the walls.
Light Shot
After its body glows, it fires a light shot.
Trap
Throws square objects that make walls to block the arena.
Flame Shot
Deploys a spinning pillar of fire.
Machine Gun
Fires a machine gun aimed at X's location.
Spread Shot
Fires a splitting shot. If it hits X, it paralyzes him.
Dash Attack
Dashes towards X at high speed, grabbing and damaging him.
A famous Reploid scientist equipped with a super high-performance computer. He longed for a peaceful world in which humans and Reploids coexist, but his personality has suddenly changed and he is now an enemy of humanity.
Attack:
Effect:
Charge
Dash attack while wreathed in flames.
Electric Shot
Shoots three electric shots.
Attack Absorb
Absorbs attacks using a green aura that restores his health when hit.
Formerly the commander of X and Zero, he was once called the strongest Reploid in history. More than once he has provoked rebellion against humanity and been destroyed by X, but is now revived with a new body.
Attack:
Effect:
Flame Shot
Shoots fireballs while jumping.
Rapid-Fire Flame Shot
Shoots six fireballs.
Shield Throw
Attacks by throwing his shield. Used once he has reached half health.
Once Sigma's body is destroyed by X, he fuses with a giant body possessing maximum fighting ability. If X destroys this body too, Sigma's true form will be revealed.
Attack:
Effect:
Mine
Launches a flying mine.
Missile
Fires missiles that chase X.
Beam
Shoots a ray from the cannon on his shoulder.
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Mega Man X4
Mega Man X4 has 17 Boss Files in the book (pages 65-73).
Maverick with the body of a huge dragon. It suddenly attacks Repliforce's headquarters and kidnaps Iris. It attacks X and Zero with its huge claws and electromagnetic shots.
Attack:
Effect:
Electromagnetic Shot
Fires a shot from its mouth (single shot or rapid-fire).
A red dragon Maverick who is skilled in martial arts, fighting mainly with flames. He can leap from left to right, deploy bursts of flame, and attack with overwhelming firepower.
Attack:
Effect:
Hadouken
Throws a horizontal fireball with a shout.
Nosedive
Jumps and divekicks diagonally.
Rising Fire
Leaps upwards while wreathed in flames.
Fire Pillar Attack
Throws a fireball into the lava to raise a pillar of fire.
Fire Attack
Spits fire from his mouth.
Flame Shot
Shoots flames into the sky, making volcanic bombs rain down.
Militant boss who attacks in the middle of the stage prior. He is similar to a stingray, swimming freely through the water with a jet on his chest. He launches missiles in the shape of small stingrays.
Attack:
Effect:
Ground Hunter
Fires a small stingray Mechaniloid that crawls on the floor (blue) or targets the player (red).
Nosedive
Dives low and then rises.
Jet Stream
Draws the player in with a water current from his jet, then attacks.
A Maverick with the appearance of a lion. Within Repliforce, he is known for his ferocity, slashing everything with his steel claws and fangs. He was put in charge of escorting military trains for the rebellion.
Attack:
Effect:
Jump Attack
Jumps and suddenly descends vertically.
Charge
Deploys claws before dashing back and forth, stopping to stick to the wall.
He shares half of his program with Iris, making them Reploid siblings. With the strong will of his original program, he uses his laser sword to charge into battle and defend his beliefs.
Attack:
Effect:
Shockwave
Moves to the side of the screen to launch shockwaves.
Teleportation
Disappears for a moment, then reappears to slash the player.
A former Maverick Hunter who was Zero's colleague. In the rebellion, he protects a beam cannon deep in the jungle. He hangs from a thread midair to fight.
Attack:
Effect:
Lightning Web
Fires an electromagnetic web that pursues the player.
Baby Spider Attack
Creates a floating web and begins deploying small spiders to attack.
Split Mushroom resembles a mushroom and is the one behind the spiral tower. He attacks with unique techniques such as deploying clones and spreading spores.
Attack:
Effect:
Clone Attack
Sticks to the wall, deploying glowing clones that attack the player.
Clone Attack 2
Deploys an identical clone. It runs and jumps repeatedly, and will perform a spinning dash from left to right, or fall after jumping to attack with his poison.
He was originally a program made to eliminate invading hackers, but he became Maverick around the time of Repliforce's rebellion. He has a very prideful personality.
Attack:
Effect:
Tracking Shot
Raises its tail and fires homing missiles.
Feather Attack
Appears behind the player and extends its tail feathers to attack.
Rising Slash
Appears near the player and tries to slash them by spreading his tail while rising.
Member of the high command of Repliforce. He participates in the rebellion by leading the air force. He takes advantage of his ability to fly to torment his opponents.
Attack:
Effect:
Nosedive
Approaches to grab the player.
3-Way Shot
Fires shots in three directions.
Cyclone Attack
Rapid cyclones. He can also float in the center and attack in four different directions.
The rookie Hunter, Double, was actually someone's spy. After plunging the organization into confusion, he attacks X by baring his fangs and shedding his false appearance.
Attack:
Effect:
Tackle
Jumps and dashes at the player from above.
Wave Shot
Fires large wave bullets, first high then low.
Light Shot
Fires a round bullet of light.
Split Attack Cutter
Fires cutters that bounce off the walls.
Split Attack Cutter (Bat)
Fires a bullet downwards while trying to match the player's position from above.
The commander-in-chief of all of Repliforce. He is over twice the size of most Reploids. He fell into the deceptions of a mysterious person and became hostile against humanity...
Attack:
Effect:
Tackle
Floats across the screen to smash the player.
Ring Laser
Fires ring-shaped lasers from his arms.
Shuriken Laser
Fires shuriken-shaped lasers, three shots high and three shots low.
A mysterious Reploid that wears a black robe and that only shows his glowing eyes. Originally he was a Hunter, but was damaged by Zero and became a Maverick.
Attack:
Effect:
Shot Attack
Fires six shots along the ground in 2 types: below and above the player.
When his second form is defeated, the arena changes and Sigma converts to his third form. It attacks with two types of main body and three types of mini bodies that resemble daruma.
Attack:
Effect:
Flame Shot
The red head shoots four sets of four fireballs.
Electromagnetic Shot
The yellow head shoots six electric balls.
Ice Fog
The blue head shoots ice mist.
Spike Attack
Pushes the player with wind towards spikes on the right wall.
Slime Body
The Slime Body on the left side attempts to suck the player in.
Clear Laser
The Cyborg Body shoots a laser that sweeps away everything.
Tracking Laser
The Cyborg Body shoots a laser aimed at the player.
Mega Man X5
Mega Man X5 has 16 Boss Files in the book (pages 80-87).
Suddenly, the face of the goddess statue cracks and Sigma appears. He does not truly fight seriously, likely because his true purpose is to spread the Sigma Virus across the Earth.
Thanks to the rocket booster on his back, he moves lightly despite his huge body and launches himself at his opponent. He approaches the player with terrible attacks using his huge claws and drill.
Attack:
Effect:
Crescent Shot
Fires small crescent moon-shaped shots.
Drill Arm
Drill attack from below when the player is on high ground.
Crescent Claw
Claw attack from above when the player is on low ground.
A whale-shaped Reploid. Although he is huge, he can swim and use blocks of ice to attack the player. Despite his few attack patterns, beware the spikes on the right wall of the arena.
Attack:
Effect:
Ice Block A
Shoots ice blocks, then fires Goo Shaver for a short time. Then the ice blocks return while he fires torpedoes.
Ice Block B
Shoots trios of ice blocks to push the player into the spikes on the wall.
The head of the super-electromagnetic research laboratory, who resembles a squid. Several of his attacks use electric waves that cover the entire arena, which spans two whole screens.
Attack:
Effect:
Tri-Thunder
Shoots three electric shocks upwards, forwards, and downwards.
Ground Spark
Descends to generate an electric shock along the floor.
He is always airborne and his shooting systems are very accurate. Although his teleportation can make him unpredictable, there are still opportunities to attack him.
Attack:
Effect:
Flash Laser
A shot that pursues the player.
Prism Laser
Fires a laser either vertically or horizontally.
Prism Shot
Fire eight shots across the floor, then pulls them back.
A boss in the form of a pegasus. He has wings and can glide freely through the air to hit the player, and can generate tornadoes. He is the ruler of the skies.
Attack:
Effect:
Dash Attack
Dashes towards the player horizontally.
Hurricane
Attacks by creating a blue afterimage.
Shoryuken
After leaving the screen, he attacks from off-screen with afterimages.
A mysterious Reploid who appears at Hunter Base. He behaves like a selfish mercenary with a lazy attitude at first glance, but his skills should not be underestimated.
Attack:
Effect:
D Blade
Thows his saber to attack.
Tsubame Gaeshi
Jumps and slashes from above (when using X).
Trick Shot
Jumps and fires a shot downwards, which splits horizontally at the player's height (when using Zero).
Earth Gaizer
A series of lightning pillars up from the floor all over the screen. Only used in second round.
A dinosaur-shaped boss coated in fire. He pushes the player around with overwhelming power. His movement is fast for his size and he attacks with burning flames.
Attack:
Effect:
Tackle
Dashes in the player's direction to crush them.
Ground Fire
Spits a flame aimed at the player.
Fireball
Clings to the wall and spits flames.
Burn Tackle
Spreads flames across the floor, then coats his body in fire and dashes, leaving pillars of fire.
As his name suggests, he is a rose-based boss. He is a Reploid made of plants, attacking with spike balls and a thorny whip. However, he is weak to fire attacks, which burn plants.
Attack:
Effect:
Spike Ball
Throws a ball of green or purple thorns. The purple ones bounce.
Rose Whip
Extends a thorn whip horizontally to catch the player.
Rose Cutter
Makes petals that harm the player rain from the sky.
A boss associated with the Mega Man series, with a new look. It splits its body and throws itself to attack the player, and the lasers emitted by its enormous eye are quite powerful.
Attack:
Effect:
Split Attack
Divides its body into blocks and flies.
Eye Shot
Shoots a glowing shot form its eye.
W Press
Transforms into a weight and falls from above, or slides from side to side.
It looks like a simple mural at first sight, but with its three eyeballs and sun mouth, it launches a variety of attacks. It is a strong enemy since it can attacks with walls and make spikes appear.
Attack:
Effect:
Red Eye
Red eye that shoots flames while spinning.
Blue Eye
Blue eye that pursues the player with its body.
Green Eye
Green eye that shoots a stream of shots.
Sol Boca
Sun that charges the player when the spikes and walls close.
If the player challenges Zero Space 3 with X, Zero appears as the boss. Additionally, if Zero disappears during the story, he fights with a stronger attack pattern.
The source of the disasters, the cause of the conflict, the one who spread the virus, the final boss: Sigma. His first form resembles a human and maliciously attacks as if he curses the world.
Sigma takes his true form once his first form is destroyed, appearing as a gigantic robot. Only the upper part of his body is on screen, but the power of his entire body is huge.
Attack:
Effect:
Missile Punch
Fires a flying fist that fires shots.
Tracker Shot
Fires four shots into the ground, which then fly towards the player twice.
Thunder Attack
An arm stops in the sky and shoots electricity downwards.
Purple Cube Attack
Creates purple cubes, and the last one chases the player.
Charge Shot
Shoots a purple shot from one hand.
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Mega Man X6
Mega Man X6 has 17 Boss Files in the book (pages 94-101).
A giant Mechaniloid Maverick that heralds the beginning of a battle against the Nightmare. It begins to wreak havoc due to the electromagnetic interference.
Attack:
Effect:
Shot (Normal)
Shoots from its core.
Shot (Fire Pillar)
Shoots from its body, which explodes vertically when it hits the ground.
Crush Attack
Aligns itself with X's position, either high or low, and accelerates.
A Reploid for jungle nature conservation projects who is the Investigator in the Amazon Area. He refuses to cooperate with the Maverick Hunters and distrusts Reploid researchers.
Attack:
Effect:
Formation Guard
Fires shots from the edge of the arena and moves to the opposite side.
Formation Wing
Fires shots while moving from one side to the other, flanked by Yammar Option above and below him.
Formation Final
Chases the player with Yammar Option following behind.
A Reploid that once fought with the same philosophy as X and Zero. It seems that he committed suicide because he could not fulfill his duty as a guard. He has been resurrected by Gate to fulfill his duty as an Investigator.
Attack:
Effect:
Shield Throw
Teleports to the bottom of the arena and throws his shells sideways and diagonally upwards.
Bounce Attack
Teleports to the top and bounces around the arena.
Guard Shell
Deploys barriers up, down, left, and right and starts chasing the player.
Mirror Shell
If he summons a clone, they both throw their shells to attack. If he summons four shells, he starts dashing between them.
Originally a test pilot for giant manned weapons. Because of his high processing power, he had a misunderstanding with his staff over the execution of a dangerous test procedure. He was eliminated and it was disguised as an accident.
Attack:
Effect:
Luciferase
Releases a clone and green bubbles.
Ray Arrow
A shot that aims at the player's height, then turns at a right angle.
Charge Attack
Fires shots in eight directions with a laugh. Can be reflected with Guard Shell.
Giga Ray Arrow
Falls down the screen and fires two shots, then several beams rain down.
A treasure hunter specializing in ruins and ancient robots. He made a deal with Gate for protection from authorities in exchange for academic data, and became his subordinate.
Attack:
Effect:
Stone Roll
Rolls his stone across the screen to crush the player.
Shot Attack
After Stone Roll, he stops and shoots.
Stone Kick
Kicks the stone instead of Stone Roll. Can fly in a parabola or bounce.
Due to his skill as a hotspot researcher, he forced an unreasonable expedition that resulted in the deaths of all his colleagues. He ended up discarded in the depths underground because he ignored repeated warnings against excessive risk-taking.
Attack:
Effect:
Magma Stream
Flies up or down and calls magma onto the opposite side of the arena.
Magma Shot
If Magma Stream is below, he stops before shooting fire.
Magma Wave
If Magma Stream is above, he fires crescent-shaped shots high or low.
God Bird
After leaving the screen, he returns as a huge firebird from the side.
A water quality improvement researcher with a shell so that he can even study hazardous areas with level four pollution. He committed suicide when his excessive defenses were considered too dangerous, but he has since been revived.
Attack:
Effect:
Missile Attack
Launches a large amount of missiles from the green weak spots on his back.
Rolling Attack
Hides in his shell and chases the player, shaking the walls when he hits them.
Meteor Rain
Fires water shots during Rolling Attack. In Xtreme difficulty, water rains diagonally from off screen.
Former member of a recycling research team. Inspired by Gate, he analyzed Maverick DNA and found a way to resurrect Mavericks. However, he was punished for violating regulations.
Attack:
Effect:
Metal Head
Attacks using his head and dorsal fin.
Metal Anchor
Jumps high and throws an anchor.
Helper Attack
Summons one of three Mavericks to attack. He summons Magna Centipede for X, Sting Chameleon for Zero, or Blast Hornet in Xtreme difficulty.
A Reploid with high resistance to low temperatures, who served as the head of a snow land development team. His performance caused problems, and he died in a trap set by Alia, who had received orders to eliminate him...
Attack:
Effect:
Rush Attack
Runs along the ground to hit the player, sometimes jumping.
Ice Burst
Spits an ice shot, which flies in a parabola for X or a straight line for Zero.
Ice Fragment
Clings to the ceiling and spits a stream of ice shots.
Dash
Generates icicles by dashing. Used only if his Boss Level is Lv.03 or higher, or in Xtreme difficulty.
A Reploid copy of Zero created by someone unknown. It inherited parts of Zero's memories, and seems to have been created from the parts of Zero that were destroyed in the battle.
Attack:
Effect:
Buster & Saber Attack
Attacks with his buster from afar, and with his saber up close.
Genmu Zero Kai
Enlarges his saber to fire a large crescent-shaped shot. Used three times in a row in Xtreme difficulty.
He was created by the renowned scientific genius Gate as a Reploid to surpass the ancient robot X. In terms of numerical performance, he far exceeds X.
Attack:
Effect:
Cross Shot
Fires four shots in a row three times.
Tackle Attack
Generates a blue ring around his body, then descends to attack.
Death Ball
Three variations: an attack where he dashes holding a Death Ball, an attack with a Death Ball that crawls along surfaces, and an attack that scatters a series of small Death Balls.
A bounty hunter whose services were purchased by Sigma. He tormented X and Zero during the space colony fall incident. Now, he is a lone wolf with great fighting capacity.
Attack:
Effect:
Earth Gaizer Kai
Shoots lasers that cover most of the arena.
D Blade Kai
Throws sabers at the player, which then return.
D Blade Ran
Throws sabers by spinning his saber, which chase after the player.
Tsubame Gaeshi
Jumps and slashes with his saber. Dodge it by dashing underneath him.
A genius scientist who was once Alia's colleague. After many frustrations, he has reached a dangerous conclusion, taking advantage of the chaos of the colony's fall to build an ideal Reploid kingdom that would eliminate all humans.
Attack:
Effect:
Nightmare Hole
Orange shoots, red slows the player's movement, green chases the player, blue pulls the player, and purple creates Nightmare Viruses.
Nightmare Move
Dashes towards the player, from platform to platform.
Nightmare Strike
Shouts and performs a wide palm attack, which can break platforms.
He was cornered by X and Zero, who stopped his plan to drop the space colony, and then was defeated by Zero, killing each other. He has been revived, but his resurrection was incomplete so his fighting ability is low.
Attack:
Effect:
Bug Shot
Fires high-speed shots from his mouth.
Bug Cloud
A large green wave that can be pushed and destroyed by attacks.
Bug Wave
Shots that go high, middle, or low. Low can be jumped over, and the high and middle can be avoided by crouching.
After giving up his old form that could only fight with imperfect power, he adopts this final form to bury X and Zero. Its weak point is the part exposed when his lasers are fired.
Attack:
Effect:
Minion Summon
A green object that becomes an enemy. If destroyed, it can drop Life Energy items.
Giant Laser
A crosshairs appears on the floor and a huge laser appears at that ocation.
Beam Attack
Sigma opens his mouth to shoot a powerful beam sideways.
Shot Attack
Fires a small shot that splits into two huge shots left and right.
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Mega Man X7
Mega Man X7 has 13 Boss Files in the book (pages 108-112).
A giant Reploid shaped like a scorpion. With a powerful Tail Shot from its tail and the tornado-like Ground Circle attack, it pursues Axl relentlessly.
Attack:
Effect:
Tail Shot
Shoot 3 red shots from its tail.
Ground Circle
Drops an orb of light on the ground that becomes a widespread attack.
The brawn of Red Alert, who values loyalty above all else. He swings around and throws giant stones with overwhelming strength. He fights with a powerful sword and even uses his shield as a weapon.
Attack:
Effect:
Rock Throw
Throws a stone on the floor, which splits in half and moves around the arena.
A Red Alert assassin who manipulates tornadoes charged with electricity. He looks like a joke at first, as he fights by dancing, but his abilities are unquestionable.
A powerful enemy who has mastered fighting with his naginata and missiles. He has a sly personality, swimming freely through the water to appear behind the player.
Attack:
Effect:
Splash Laser
Shoots a laser of water.
Naginata Attack
Swipes at the player with his naginata, or spins it to defend against attacks.
Waterspout & Tobiuo Missile
Stabs the ground, raising a column of water and two homing missiles.
A Reploid who attacks alongside a giant Mechaniloid. The boss himself splits into three bodies to launch powerful attacks, such as fireballs and homing missiles.
Attack:
Effect:
Seeker Missile
The giant gazelle Mechaniloid fires homing missiles.
Fireball
Throws a fireball.
Fire Break
Surrounds the player with clones and runs around them.
Clone Summon
Alternates between dashing and throwing fireballs with his clones.
A boss who speeds around in a circular arena resembling a motocross ring. He torments the player with traps around the arena and bombs thrown by the surrounding Reploids.
Attack:
Effect:
Search Wheel
Releases three to six wheel bombs to chase the player.
Lightning Fang
Glows red and dashes. He is invincible for the duration.
Laser Trap
A laser that grows in three directions and rotates.
A difficult adversary who not only attacks with missiles, but also drones including laser pods and soldier ants. Avoid him using Axl's Rolling ability.
Attack:
Effect:
Spiral Claw
Shouts and throws a spiraling wind vortex.
Soldier Ant
Scatters ant-shaped bombs that self-destruct if the player gets close.
Laser Pod
Releases a drone that shoots lasers.
Homing Missile
Fires missiles that track the player.
Dead End Kiss
Extends his tongue to catch the player, granting him a power-up and dealing damage.
With the appearance of a karasu-tengu, this boss has a variety of techniques. He flies freely through the sky and attacks with tackles, boomerang daggers, and missiles.
Attack:
Effect:
Dagger Boomerang
A dagger that flies to the player's position.
Tackle Attack
Strikes the player from above.
Dagger
Approaches with a dash, then slashes twice followed by a spinning slash with his dagger.
Feather Missile
Missiles that track the player.
Cyclone
Holds still on the aircraft, then unleashes wind blades left and right.
Piloting a special Ride Armor, he attacks within a transparent rectangular prism. There is a theory that he sees Axl as a rival, which his attitude may confirm.
Attack:
Effect:
Gungaroo Personal Ride
Stops to do a one-two punch, or attacks with Shockwave.
One-Two-Three
Shouting, he runs while attacking continuously.
Shockwave
Crouches and launches an energy barrier with his hind legs.
Vanishing Upper
Runs while jumping three times.
Triangle Kick
Jumps at the wall yelling "Triangle Kick!" and bounces into a kick.
A tunnel construction Mechaniloid that attacks using a laser and detachable rolling cutters, mainly used for mining. It torments the player with simple but powerful attacks.
The commander of Red Alert, who leads illegal bounty hunters to eliminate Mavericks. He slashes with a scythe as if he were a Grim Reaper, then finishes the player with tornadoes.
Attack:
Effect:
Clone
Two clones appear near the player to launch a Scythe Attack.
The mastermind behind the events, a being of true evil who has manipulated the executives of the vigilante group Red Alert. He reveals himself with a humanoid body wielding a rifle and a laser gun.
Attack:
Effect:
Bound Shot
Shoots bullets from his rifle that bounce around the arena walls.
Double Shot
Appears in the air to rain down bullets for a while.
Cannon Laser
Fires a wide laser in a straight line horizontally for a short time.
Guard
Prevents the player from hitting him using his rifle as a shield.
When his first form is defeated, the arena travels to a different space for the second battle with Sigma in a giant robot body. Face the baddest of bosses from a floating platform, and deliver the final blow.
Attack:
Effect:
Dash Punch
Dash punch attack from afar.
Green Shot
Fires four green shots that track the player.
Red Shot
Approaches and continuously fires red shots from his mouth.
Laser
Sweeps the arena with a wide laser.
Rotation Attack
Spins rapidly, releasing four bullets.
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Mega Man Xtreme
Mega Man Xtreme has 15 Boss Files in the book (pages 120-125).
A Reploid formerly part of the 17th Unit, like X. He was arrested for deviating from missions with destructive behavior, due to a glitch in his electronic brain. Appeared in Mega Man X.
Attack:
Effect:
Charge
Dashes across the arena, from right to left.
Dash Punch
After charging up on the left side, he moves to the right while punching.
A Reploid who was commander of the 7th Airborne Unit. He first fought against the rebels on the side of X, but he lost a fight against Sigma and had to surrender. Appeared in Mega Man X.
A Reploid designed for cold regions, who joined the rebellion because he was tired of living at the South Pole. He attacks with frigid air that can freeze X. Appeared in Mega Man X.
Attack:
Effect:
Shotgun Ice
Spits four ice shots.
Ice Sculpture
Creates two ice statues. X freezes if he touches the breath.
Blizzard
Grabs a hook to cause a blizzard, pushing X and the ice statues with wind.
Former commander of the 8th Armored Unit. A righteous warrior, he followed his superior Sigma and joined the rebels. His tough armor can reflect even X's Charge Shots. Appeared in Mega Man X.
Attack:
Effect:
Guard
After blocking a Charge Shot, he counterattacks by firing shots in five directions.
Tackle
Dashes sideways, bouncing off the walls on contact.
A Reploid of unknown affiliation who appeared in Mega Man X2. He has the special ability to absorb the remains of scrapped Reploids to grow and transform during battle.
Attack:
Effect:
Dash Scrap-Scatter
Before transforming, he dashes back and forth while scattering junk.
Scrap-Scatter
Before transforming, he hangs from the ceiling and tosses junk.
Phosphorescent Powder
Sprinkles phosphorescent powder while gliding.
Beam
Stops midair to shoot light in one of four directions.
Although he was a member of the Special 0 Unit, Sigma brainwashed him into a Maverick. He operated a super computer to spread the Maverick Virus around the world. Appeared in Mega Man X2.
Attack:
Effect:
Maverick Virus
Sucks X into his grasp and injects a virus.
Magnet Mine
Splits his tail into two and surrounds X. It splits into three when his health is low.
Originally a Maverick Hunter in the 6th Naval Unit, he was persecuted as a traitor for harming comrades, being unable to control his ferocious tendencies. Appeared in Mega Man X2.
Attack:
Effect:
Spin Wheel (Underwater)
Shoots a wheel out of the water, which can climb walls.
Spin Wheel (Above Water)
Shoots a wheel over the water that bounces across the surface.
Biting
Bites at X from underwater. Can even grab X out of the air.
Shot Devour
Can eat X's shots and spit them back.
Lunge
Dashes while spinning his body. He only uses it at half health.
A Shadow Hunter like Zain, another original boss for Mega Man Xtreme. He wields a huge shuriken. Unlike the calm Zain, he has a very talkative and antsy personality.
Attack:
Effect:
Shuriken
Throws his huge shuriken four times, in two directions.
Teleport
Teleports above X to attack him.
Kite Riding
Rides a kite and throws his shuriken from the air. Used when he is at half health.
One of the three X-Hunters who appeared in Mega Man X2. With a brain even superior to Sigma's, he challenges X in a giant tank that he constructed himself.
Attack:
Effect:
Turret 1
Fires a shot that bounces off the ground.
Turret 2
Fires a shot that moves like a boomerang.
Turret 3
Fires a shot aimed at X.
Turret 4
Fires a powerful laser horizontally.
Split Shot
Fires alternating shots that split in a cross or an X shape.
X's former commander, known as the strongest Reploid in history. He went Maverick and became an enemy of humanity. His attack strategy is based on his appearance in Mega Man X.
An enormous Sigma demonstrating his true power. He has a wide variety of attacks that he launches in a storm to destroy X. It is based on Sigma's appearance in Mega Man X, like his first form.
Attack:
Effect:
Flamethrower 1
Breathes fire downwards.
Rapid-Fire Electric Shots
Scatters nine electric shots downwards.
Electric Shock
Shoots an electric shock upwards from the palms of its hands.
Punch
Punches with its left and right hands.
Lightning Shot
Shoots a lightning shot that travels up the walls.
Lightning Flash
Scatters lightning shots downwards that generate lightning at the point of impact.
Flamethrower 2
Breathes fire downwards, which lingers for a while.
Mega Man Xtreme 2
Mega Man Xtreme 2 has 15 Boss Files in the book (pages 132-137).
A skeleton-like Mechaniloid. Its enormous physique is overwhelming, but its movement is slow and its attacks are monotonous. An original boss for Mega Man Xtreme 2.
Attack:
Effect:
Minion Summon
Spits out several enemies from its mouth.
Disc Launch
Shoots a disc that moves from left to right on the ground.
A Reploid of unknown affiliation that appeared in Mega Man X2. He had a carefree personality and was satisfied as long as he was having fun, playfully changing the climate at the weather center.
Attack:
Effect:
Strike Chain
Extends his chain horizontally. If it hits a wall, he is pulled towards it.
Hanging
Extends a chain to hang from the ceiling, where he scatters seeds.
Ray
Turns red and summons three beams (four in Extreme). He is invincible during this attack.
Formerly a Maverick Hunter from the 7th Airborne Unit. He lost his ability to fly in an accident, but Sigma discovered his excellent leg strength and made use of him as a subordinate. Appeared in Mega Man X2.
Vice-captain of the Special 0 Unit, and former subordinate of Zero. Normally calm and cautious, he went Maverick after being infected with the Sigma Virus. Appeared in Mega Man X3.
Attack:
Effect:
Stinger Attack
Extends a stinger from his abdomen. The trajectory changes once he is at half health.
Mini Bee Summon
Shoots a small bee bomb. The bee teleports in Extreme.
A mining Reploid made to extract Energen Crystals. He was once a serious craftsman, but went Maverick due to the influence of the Sigma Virus. Appeared in Mega Man X3.
Attack:
Effect:
Charge 1
Dashes towards the player.
Charge 2
Dashes twice while scattering rocks.
Drill Missile
Fires two drills horizontally simultaneously.
Drill Drive
Shoots drills that come out of the ceiling and floor. Only in Extreme.
A hunter created to protect endangered animals from poachers. Despite going Maverick, he still operated in the jungle that was his original territory. Appeared in Mega Man X3.
Attack:
Effect:
Dive Attack
Attacks the player from the wall above.
Ray Splasher
Fires 3-5 bullets in rapid succession.
Launch Attack
Double attack of a dash into an uppercut. Only used with low health.
A Reploid with a high-performance power generator built into his body. He worked as a mobile emergency power plant, but went Maverick and became an enemy of humanity. Appeared in Mega Man X3.
Attack:
Effect:
Suction Attack
Attacks with lightning while sucking the player in.
Body Press
Jumps and falls with a body press, releasing an electric shock along the floor.
3-Way Electric Shot
Shoots an electric shock that spreads in three directions.
A Reploid who belonged to the 6th Naval Unit. Dissatisfied with the idea of protecting the weak humans, he rebelled and joined Sigma for his similar ideals. Appeared in Mega Man X.
Former captain of the 4th Land Unit, who frequently fought in the desert. He joined Sigma's rebellion because he wanted to use his full strength to cause wanton destruction. Appeared in Mega Man X.
Attack:
Effect:
Flame
Shoots flames from his buster.
Earthquake
Jumps and causes an earthquake when he lands. If the player is on the floor, they trip.
A tank made to repel the Maverick Hunters, full of powerful weapons and with the Sigma insignia emblazoned on its body. An original boss for Mega Man Xtreme 2.
Attack:
Effect:
Drill Attack
Spins its drill while dashing forwards.
Homing Shot
The upper face shoots a bullet at the player.
Missile
Launches a missile vertically from below, which descends upon the player.
The arch-enemy of X and his friends, said to be the strongest Reploid in history. His weapons and attack patterns are based on his appearance in Mega Man X2.
Attack:
Effect:
Claw Attack
Dashes and slashes with his claws.
Light Shot
Fires wide vertical shots of light.
5 Bullet Shot
Fires five consecutive electric shots at the player.
Vertical Drop
Triangle kicks above the player, then performs a vertical drop attack.
Sigma piloting a giant Ride Armor. He fights mercilessly with a wide range of attacks that cover the entire screen. An original boss for Mega Man Xtreme 2.
Attack:
Effect:
Green Light Shot
Shoots green bullets. Can be countered by Zero's attacks.
Earthquake
Jumps and causes an earthquake when he lands, tripping the player.
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