Mega Man X:
Reploid leader of the 17th Unit, Maverick Hunters. His creation is shrouded in mystery; nobody knows why he was built and then buried. X is famous among Maverick Hunters for defeating Sigma twice and leading to its ultimate demise. X understands his role, and believes deeply in the need to protect reploids and humans alike. But he has an inner conflict about fighting and violence. It is up to X and Zero to locate and destroy Dr Doppler before all is lost.

Zero:
Zero is Mega Man X's best friend and partner. His creation is a mystery as well, yet many rumors and much speculation have arisen. Recently destroyed to protect X against the maverick Vile, Zero has been revived to continue the aid he has offered X in the past. Once part of the 17th Unit, Maverick Hunters, Zero now leads a Special #0 Class Unit. Always cool and calm, Zero takes quick action against the evil forces he hates so much.

Dr Cain:
Dr Cain is the main core advisor of the Maverick Hunters. He was the one who found X encased in the capsule, and was the one who began the construction of the new reploids. Deeply concerned about the current situation, he will provide X and Zero with as much information as possible about the mavericks to ensure their final and ultimate demise.

Dr Light:
Dr Light is the mysterious creator of X. Once again he will be found in the secret capsules found throughout the stages of the game. He will provide X with new upgrades for his armor to greatly enhance his components and give him further advantages over the mavericks.

Mac:
Mac is a service reploid in operation at the Maverick Hunter headquarters. When the Doppler force invaded the HQ, he was captured and infected with the maverick virus. Now he lies in wait of Mega Man X and has been programmed to exterminate any resistance to the mavericks.

Bit:
Bit is one of Doppler's loyal henchmen. Created by Doppler for high-performance missions, Bit has a destructive mind and will follow orders closely. Bent on destruction of humans, Bit is built for war and has been programmed to destroy Mega Man X and Zero.

Byte:
Byte is Bit's larger partner. Also built for war, Byte has massive destructive power and is extremely confident in his ability to destroy Mega Man X. To confront Doppler, X must first deal with Bit and Byte.

Vile:
Once a top henchman for Sigma, Vile was destroyed at the hands of Mega Man X and Zero. When Doppler became virus-infected, its' first move was to revive Vile. When Vile became infected with the same computer virus it went completely nuts. Doppler could not control Vile. Vile went on a rampage, and has become so stricken with hatred for Mega Man X and Zero, and is waiting for the right moment to attack them for his revenge.

Dr Doppler:
A scientist reploid created to support humans in creation of reploids. Equipped with a high-performance Neuro-computer, Doppler was instrumental in determining the cause of the recent Maverick outbreak. It's anti-virus was revolutionary and once again brought peace to the world. Re-programmed to build a utopian world called Doppler Town where humans and reploids lived in harmony. It grew too quickly and became infected with the same virus it was believed to remedy. Doppler incited a new Maverick outbreak and created chaos in Doppler Town. It changed its computer body into one geared for battle and gathered all the reploids in its' first move in war against humans.

Sigma:
Sigma has returned again, this time by infecting Dr Doppler with the maverick virus and then slowly building up his army. Once infected, Doppler secretly created new war bodies for Sigma to posses and use to rule the world. Once again at the helm of the mavericks, Sigma's true form has been discovered to be that of a computer virus and the cause of all the mavericks. Sigma knows that X and Zero are after him, but he cannot wait for the moment where he can finally attempt to destroy Mega Man X, but he still underestimates the power X has. The destruction of Sigma is now more important than ever, as if the Sigma virus is destroyed, the maverick revolt will end forever.

Blizzard Buffalo:
Guide: Blizzard Buffalo will begin by charging at you. He will do this often. If he makes his horns glow gold and then grabs you, he will push you up against the opposite wall and will cause heavy damage. Dodge him by jumping up the wall and over him as he passes. He will also often fire out three ice projectiles that will become large ice shards when they hit the ground. If he begins to charge up his body, jump high up on the opposite wall as he will fire out a long ice beam that will freeze you if it hits you, and he will then charge at you and cause damage. To defeat him, use the Parasitic Bomb or the X-Buster. With the X-Buster, jump up over him as he hits a wall and shoot him from behind with a charged shot. Dash across to the other side of the room and wait for him there and then repeat the process to finish him off.
Weakness: Parasitic Bomb.
Weapon Received: Frost Shield.

Tunnel Rhino:
Guide: Tunnel Rhino will be obsessed with charging towards you all the time during this battle. He will begin by charging at you and will slam into the wall. He will then turn around and repeat the same for the other wall. He will often stop and fire out three large drills that will slowly fly forward into the wall. He will also sometimes fire one drill from his gun and two from his shoulders. To defeat him, use the Acid Burst. Each time he slams into a wall, shoot him in the back before he turns around. Once his health is about half gone, he will begin to charge across the room glowing and will be invincible until he stops glowing. Keep shooting him in the back when he hits a wall to finish him off.
Weakness: Acid Burst.
Weapon Received: Tornado Fang.

Neon Tiger:
Guide: Neon Tiger will be moving around often during this battle. He will begin by firing out several energy balls from his tail. Try to dodge them as they will only travel in straight lines. He will also often slash at you with his claws if you come too close. He will occasionally jump up one of the walls and fire off energy beams from there. To defeat him, use the Spinning Blade. Try to fire it away from his direction when he is high up on the wall so that the upper blade will fly around and hit him. Just remember to keep out of his way and to fire the Spinning Blade from the right position.
Weakness: Spinning Blade.
Weapon Received: Ray Splasher.

Volt Catfish:
Guide: Volt Catfish will begin by charging towards you. He will bounce to one end of the room and will fire off an electric ball to the other end of the room. He will also sometimes fire out three electric balls and then fire out three more that will grab the first three and draw them back in to him. He will then fire out two electric bolts above him. Dodge the electric balls by jumping up to the top of the wall. To defeat him, use the Tornado Fang. As he jumps around shoot him before he hits you. When his health is down to about half, he will jump to the center of the screen and call down large electric bolts that will cause him to begin charging with electricity. He will then fire out small sparks which will cause damage if they hit you. He will then charge to one end of the room and repeat the process. As he jumps back to the center of the room, shoot him as he lands and he won't be able to use the electric charge attack.
Weakness: Tornado Fang.
Weapon Received: Triad Thunder.

Gravity Beetle:
Guide: Gravity Beetle will be jumping around often during this battle. He will also often fire out two energy balls that will bounce around the room. Try to dodge them as they will cause huge damage to X if you hit them. He will also occasionally glow and charge towards you into the wall. To defeat him, use the Ray Splasher. Once his health is taken down to about half, he will create a swirling vortex in the ceiling which will begin to suck objects into it. Make sure that you don't touch the portal as it will also cause heavy damage. Dodge it by dashing under Gravity Beetle when he jumps. Just make sure that you don't take many hits during this battle as his weapons are very strong.
Weakness: Ray Splasher.
Weapon Received: Gravity Well.

Blast Hornet:
Guide: Blast Hornet will be flying around the top of the screen most of the time during this battle. He will often extend his large sting tail and will charge down at X. Dash away from him to dodge it. He will also often fire out several bee-type projectiles that will stick to you and cause damage if they hit X. To defeat him, use the Gravity Well. When you fire it out, Blast Hornet will begin to take damage even if the vortex isn't touching him. Make sure that you don't get hit by the small bees.
Weakness: Gravity Well.
Weapon Received: Parasitic Bomb.

Crush Crawfish:
Guide: Crush Crawfish will be constantly trying to grab you during this battle. He will begin by charging at you. If he ever grabs you he will cause continuous damage with his claw until he lets go. He will also often fire off one of his claws to try and hit you with. If you climb up one of the walls he will fire off two small objects that will cause you to fall down if they hit you, giving him a chance to dash and grab you. To defeat him use the Triad Thunder. When you fire it, jump up close to him so that the bottom left or right blast will strike him. Try to jump out of his way and make sure that he does not grab you. Be careful if he hits you when he's charging as you'll fly against the wall and take damage.
Weakness: Triad Thunder.
Weapon Received: Spinning Blade.

Toxic Seahorse:
Guide: Toxic Seahorse will be jumping around often during this battle. He will begin by jumping towards you. Dash under him before he lands. He will then fire a small acid bubble that will bounce around the room dropping small bubbles and will eventually burst when it reaches the roof. He will also sometimes glow and melt into the ground. He will then reappear in a different position. To defeat him, use the Frost Shield. When he jumps up shoot it below him so that he lands on it. When you take his health down to about half he will begin to fire out three acid bubbles that will explode and cover a larger range. Keep shooting him as he falls from a jump to finish him off.
Weakness: Frost Shield.
Weapon Received: Acid Burst.

After you finish two mavericks Bit and Byte will start to show up in the empty rooms at the 8 mavericks stages. If you want to find Vile search for the hidden capsule.

Bit:
Guide: You will fight Bit in one of the rooms with the large doors in a random stage as you proceed through the game. He will be moving around often during the battle. He will begin by flying across the screen towards you. Jump up the wall and then over him to evade him. He will then fire out one or two orange disks that will completely immobilize you if they hit you. They will bounce off the walls so be ready to dodge them more than once. He will also often fire out one or two energy beams that will home in on X. Try to dodge them by jumping over the beam as it passes. Bit will also fly at you from one side of the screen depending on your position. To defeat him, use the X-Buster or the Frost Shield. With the X-Buster, you can fire charged shots at him as he passes to successfully defeat him. If you defeat him with the X-Buster he will escape and you will have to fight him again at the end of the game. If you defeat him with the Frost Shield he will explode and you won't see him again during the game.
Weakness: Frost Shield.

Byte:
Guide: Byte will battle you in one of the empty rooms in a random stage. He will begin by firing a small mine against one of the walls. He will then charge at it and slam into the wall. If he charges at you and hits you, he will punch X up to the ceiling and then across to the mine which will throw X back at Byte and will cause a few rounds of damage. Try not to let this happen. Jump up the wall and then over him to evade this attack. To defeat him, use charged-up shots from the X-Buster from behind him when he charges at the wall. If you use the Ray Splasher against him it will cause more damage. If you defeat Byte with the X-Buster he will escape and you'll have to fight him again later in the game. If you defeat him with the Ray Splasher, he'll explode and you won't see him again. If you have defeated both Bit and Byte with the special weapons, you will have to fight a different boss instead of them later in Doppler's lab.
Weakness: Ray Splasher.

Vile Inside The Robot:
Guide: In the secret factory level which can be gained from a hidden teleporter located in each stage, you will have to battle Vile. He will begin in his Armored Carrier. It will only have the standard charge and punch attacks. Jump up the wall and jump over him as he charges towards you. To defeat him, use charged-up shots from the X-Buster and shoot him from behind when he punches a wall. If you have the Spinning Blade, use that as it is his weakness. Once you destroy his carrier he will jump out and attack you on foot.
Weakness: Spinning Blade.

Vile:
Guide: Vile will now attack you on his own. He will often jump from one corner of the room to another, dropping down a small fireball which will become a large fire-wall that will charge towards you when it hits the ground. Jump up the wall and over it to evade it. He will also often fly up into a corner and fire down small bullets that will home in on you in straight lines. Jump up the wall to lure them up there and drop down to avoid them. To defeat him, use the X-Buster or the Ray Splasher if you have it. Shoot him as he lands on the ground and wait for him to move again before firing. If you defeat him with the X-Buster he will escape and you will have to fight him again at the end of the game. If you destroy him with the Ray Splasher, he will explode and you will have to fight a different boss instead of him later in the game. Once you defeat him you will have about 60 seconds to escape the factory before it explodes.
Weakness: Ray Splasher.

Junk Robot:
Guide: You will only have to fight this boss if you have already defeated both Bit and Byte earlier with the special weapon that is their weakness. This boss will take up most of the room, with the main part up in the top right hand corner. There will be a conveyer belt on the floor which will lead into the spike wall at the rear. The device at the top of the screen will often drop down large pieces of junk that will eventually fall into the spikes on the right. During the battle the main part will often come down to the floor and fire out several acid bubbles at you. To defeat it, use the X-Buster or Ray Splasher to first destroy the long nose-shaped part of the main robot. Once it is gone, a large arm will often reach out to X and if it grabs him it will reel him in to the boss and he will cause damage. Try not to let this happen. The boss will also release a green liquid which will fill the room a little so you won't be able to go on the floor anymore as the liquid will cause damage. Continue to shoot the head of the robot with the Ray Splasher while up on the left wall and slide down the wall quickly when the arm comes towards X.
Weakness: Ray Splasher.

Bit And Byte Combo:
Guide: You will only have to fight this form of Bit and Byte if one or both of them survives during the earlier battles. They will become a larger form which has a high defense level. It will have two main attacks. The first will be one of its hands will come out and fly a X, if it grabs you, it will throw X up to the ceiling and bring you back down so that the other hand can fire off and damage you. Try to dodge the first hand before it grabs X. It will also occasionally take out an energy sword and fire off a large energy beam at you which will go up and down the left wall when it hits it. If you are high up on the wall it will fly up to release the weapon. Do not try to dash under it as you lose a life instantly if it crushes X. If you go behind it, it will fire off two energy balls that will home in on X. To defeat it, use the Ray Splasher and shoot the upper part of the body. If the hand grabs you, keep firing at it as you won't be able to move but you can still fire.
Weakness: Ray Splasher.

Doppler Octopus:
Guide: You will only have to fight this boss if you have already beaten Vile in the secret factory with the Ray Splasher. This boss will battle you in an underwater room. It will have two main attacks, one where to bottom part will open and will fire out several missiles that will home in on X. It will also often fire off one of the two fins on its sides that will also fly towards X. Its weak spot is the area just under the face. To defeat it, use the Triad Thunder. Stand below the boss and activate the weapon, and then jump up a little so that you don't hit the boss but the upper Triad Thunder blast will hit the weak spot. Continue this to defeat it.
Weakness: Triad Thunder.

Vile Inside The Huge Robot:
Guide: Vile will first battle you in a large armored carrier. You will only have to fight him here if you did not find the secret factory level or if you did not use the Ray Splasher to defeat him in the factory. He will begin by glowing and then firing out a large energy beam. Jump up the wall to dodge it. He will also be charging around the room often, and will cause you to fall off the walls if he hits it while you're up on one. He will also occasionally fire out three small pellets which will become walls in the room that will trap you if they surround you. Try to jump over him as he charges by first jumping up the walls. To defeat him, use the Parasitic Bomb. When he charges to one side of the room, jump down behind him and fire. Dash to the other side of the room and repeat this process to beat him.
Weakness: Parasitic Bomb.

Vile:
Guide: When you destroy Vile's armored carrier, he will jump out and attack. He will start by jumping up and firing out a fireball which will become a large fire-wall and will fly across the room. Try to jump over it to dodge the fire. He will also occasionally fire out several ice balls that will freeze you to the ground and he will run up and grab you, causing damage. He will also often jump up and fire out several projectiles that will fly towards you depending on where you are standing. To defeat him, use the Ray Splasher. When he lands shoot him and prepare to dodge the fire-wall again. When he shoots the ice balls jump away to dodge them. When you beat him he will finally admit defeat.
Weakness: Ray Splasher.

Dr Doppler:
Guide: This is it, the final battle with Dr Doppler himself. He will taunt you at first and will then attack. He will begin by firing three energy balls at you which will fly in straight lines so you can easily dodge them after they are launched. He will then create a red energy field around himself and will fly across the room at you depending on your current position. Jump up high on the wall and drop down to avoid him. He will then hit the wall and drop down. Do not shoot him when he is standing still as he will create a green energy field around himself which will convert your weapon blasts into energy for himself. To defeat him, use the Acid Burst. Only shoot him when he is firing the energy balls or shoot him from behind when he is flying across the room. Just remember not to shoot him when is not moving as he'll regain his health. Once you defeat him he will return to normal and will inform you of Sigma's location.
Weakness: Acid Burst.

Sigma:
Guide: Sigma will be his usual self and will taunt X before the battle begins. He will start by firing off several fireballs one at a time which will cause heavy damage to X if they hit you. Try to jump up the wall and off again to dodge them. After firing off about seven or eight fireballs, he will jump up to the center of the screen and fire down about three fireballs. He will then jump down to the other side of the room. He will also occasionally throw his shield and it will fly around the room and return to him. To defeat him, use the Spinning Blade. If you try to shoot him when his shield is raised it will block your shot. Try to hit him when he fires as his shield will move out of the way. Shoot him from behind when he jumps up before he lands again. Also try to use a charged-up shot when he jumps up as it will cause much more damage than a normal shot. You can also hit him by jumping up above him when he's standing still and then fire out behind him and the lower blade will fly around and hit him from behind. Try to stay out of contact with him and be careful of his fireballs. Remember to use sub-tanks if your health is low. When you defeat him his final form will appear.
Weakness: Spinning Blade.

Kaiser Sigma:
Guide: Sigma's final form will be that of a huge armored suit that almost takes up half of the screen. He will begin by hovering up into the air and will fly over to the left side of the room. He will then land and fire out a small mine projectile. If it hits you it will cause heavy damage. He will then fire out several missiles from his armor that will home in on X. He will then hover up again and move to the right side of the screen. He will be continually firing out the small mine weapon. From the right side of the room he will fire out a large purple beam weapon which will be fired either up high or directed down depending on your position. Try to stay out of the beam's range as it will cause continuous damage. He will then fly over to the left side again and repeat the sequence again. To defeat him, you will have to successfully hit his head with a charged-up shot from the X-Buster. When he lands, jump up the wall and fire at his shoulder pads and the blast should fly through them and hit his head, causing damage. You will need to hit him many times before he goes down. Just make sure that you stay out the range of the large beams and try to avoid the mines and missiles. You will need to use sub-tanks often during the battle. When you manage to defeat him, he will reappear as the virus form he had in MMX2. The battle will be over, but the game will continue. The room will begin to fill with lava and the screen will move up, leading you up a tall shaft. Jump up the walls but be careful of Sigma as he will often charge at you and cause you to fall down. If you fall in the lava, try to jump up out of it onto the right wall or use the mid-air dash to escape it. Eventually there will be a large opening on the right and once you get up to the platform the final cut scene will roll and Sigma will be destroyed by either Zero or Dr Doppler depending on wither or not Zero was damaged earlier in the game. Once Sigma is destroyed X and Zero will escape the lab.
Weakness: X-Buster. 

CONGRATULATIONS!!!
You finished Mega Man X3.

X-Buster:
The X-Buster is the standard weapon of the game and you begin the game with it. The normal fire will fire the usual standard shot which will cause minimal damage to targets. The charged-up shot will fire a larger beam which causes more damage to targets. Once you find the X-Buster upgrade, X will be able to fire out a wave-type beam and then fire a second shot after the first. If you charge up the X-Buster until X glows red, release the fire button and then quickly fire a second shot which will hit the first one and create a huge blast which causes massive damage to targets.

Z-Buster:
Zero has two weapons available, his standard "Z-Buster," and his Beam Saber. His blaster has the normal firing shot, as well as the charged-up state. To use his triple saber attack, charge up the weapon until he glows green. When you release the fire button he will fire off one shot and continue to glow green. Fire again and he will shoot another blast. One more time will cause him to take out his Beam Saber and strike out in front of him at any targets.
 

Acid Burst:
The Acid Burst is gained once Toxic Seahorse is defeated. This weapon will fire out a small acid bubble which will corrode and damage any target it hits. The bubble will fly out and then land on the ground, spreading out smaller bubbles. The charged-up shot will fire out more than one bubble and will cover a larger area when they hit the ground.

 

Parasitic Bomb:
The Parasitic Bomb is gained once Blast Hornet is defeated. This weapon will fire out a large spike-ball projectile which will trap any enemy it hits. Once the target has been captured, X can walk through them without taking damage. After a few seconds the target will explode. Some enemies will fly around once trapped and fly into other enemies, destroying themselves and the other target. The secondary fire will display four cross-hairs around X that will home in one enemies. Once they find a target, a small mechanical bee will fly out of X and slam into the target, destroying it.

Triad Thunder:
The Triad Thunder is gained once Volt Catfish is defeated. This weapon will create three large electric mines around X which will fire out large electric lines to each other and then out in an upward and diagonal directions. The charged-up shot will make X punch the ground and cause everything on the screen to shake. He will then fire out two electric balls either side of him. This technique can be used to destroy some platforms and can destroy the large hanging boulders in Tunnel Rhino's stage.


 

Spinning Blade:
The Spinning Blade is gained once you defeat Crush Crawfish. This weapon will fire out two spinning blade projectiles which will fly out from X and then fly back towards him and then behind him. This weapon will take practice to use, but it can be effective for striking high-up targets. The secondary fire will shoot out a large spinning blade attached to X by a long green chain. It will cause heavier damage to targets.

 

Ray Splasher:
The Ray Splasher is gained once Neon Tiger is defeated. This weapon will fire out small rapid energy balls which will fly out on slightly diagonal lines. The secondary fire will cause X to shoot out a crystal ball above him which will randomly fire out small energy balls in different directions, giving him a larger range of fire.

 

Gravity Well:
The Gravity Well is gained once you defeat Gravity Beetle. This weapon will fire out a small energy ball which will create a large energy barrier around itself. This weapon will only damage some enemies, and is more effective against some bosses. The secondary fire will shoot a large energy ball straight up and cause all the objects on the screen to fly up. This can be used to raise some platforms in certain stages.
 

Frost Shield:
The Frost Shield is gained once you defeat Blizzard Buffalo. This weapon will fire out a small icicle-type projectile, which will slowly accelerate forward and will strike through any targets. If it hits something and breaks apart, the debris of the projectile will create a small spike object when it hits the ground and will damage anything that touches them. The charged-up shot will create a large ice block attached to X which can be used to charge against enemies without taking damage.
 

Tornado Fang:
The Tornado Fang is gained once you defeat Tunnel Rhino. This weapon will fire a small drill-projectile which will fly straight ahead and damage any enemies it strikes. This weapon can also be used to destroy crumbling walls found in some stages. The charged-up shot will make a drill appear in front of X and can be used to charge into enemies without taking damage from them. You can also grab onto a wall and stay in position if you activate the secondary fire and jump onto a wall.

The Gold Armor:
The Gold Armor can be found in the first level of Dr Doppler's lab. Just after the robot ride armor platform and before the room with the falling spiked balls will be a large hole. Drop down the left of the hole and slide down the wall until you find the secret room. To actually see the capsule you will need to have full health and you must not have gotten any of the four energy chips. This capsule will give X all of the energy chips and it will turn his armor to a gold color. X will now have all of the chip's upgrades in one, which will make the game much easier. Just remember to not get any of the upgrade chips in the other levels if you want to find this.

The Z-Saber:
Zero's Beam Saber can be used by X, and here's how! First, you must have defeated Vile in the secret factory level using the Ray Splasher against him so that he explodes and doesn't just run away. In Dr. Doppler's first stage, you will find in the large, normally empty room a bug-type boss will be waiting. Use Zero to defeat it and the boss will fly into him and cause all of his energy to disappear. X will teleport down and Zero will say that he's failed. Zero will then go back to Dr. Cain and will give X his Beam Saber! You can now use it the same way Zero did, by charging up until X glows green. This time when X fires it he will shoot a large green energy beam forward as well. The only disadvantage is that Zero won't appear in the finale at the end of the game.