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       Mega Man XZ: The Maverick Hunters > Mega Man X Series > Mega Man X3 > Bosses Guide
Listed below are all the bosses you'll encounter in the game. Each entry has a detailed description and guide on how to defeat each boss, including which special weapons to use. The first eight bosses are displayed in order of weapon weaknesses. Remember to have sub-tanks filled up before taking on a boss, they can really help you out in a battle. Keep in mind that you'll also have to face Bit and Byte in certain stages. Bosses

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Blizzard Buffalo Toxic Seahorse Tunnel Rhino Volt Catfish Crush Crawfish Neon Tiger Gravity Beetle Blast Hornet

Blizzard Buffalo

Power: 9200rp
Speed: 3200rp
Weakness:
Parasitic Bomb
Special Weapon:
Frost Shield
Blizzard Buffalo
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. When you defeat him you'll receive the Frost Shield.

Toxic Seahorse

Power: 5800rp
Speed: 4300rp
Weakness:
Frost Shield
Special Weapon:
Acid Burst
Toxic Seahorse
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. Once he is defeated you'll receive the Acid Burst.

Tunnel Rhino

Power: 4200rp
Speed: 8000rp
Weakness:
Acid Burst
Special Weapon:
Tornado Fang
Tunnel Rhino
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. When you defeat him you'll receive the Tornado Fang.

Volt Catfish

Power: 8200rp
Speed: 1600rp
Weakness:
Tornado Fang
Special Weapon:
Triad Thunder
Volt Catfish
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. Once he is destroyed you'll receive the Triad Thunder.

Crush Crawfish

Power: 4000rp
Speed: 7600rp
Weakness:
Triad Thunder
Special Weapon:
Spinning Blade
Crush Crawfish
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. Once he is defeated you'll receive the Spinning Blade.

Neon Tiger

Power: 3600rp
Speed: 9900rp
Weakness:
Spinning Blade
Special Weapon:
Ray Splasher
Neon Tiger
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. Once he is destroyed you'll receive the Ray Splasher.

Gravity Beetle

Power: 6200rp
Speed: 3600rp
Weakness:
Ray Splasher
Special Weapon:
Gravity Well
Gravity Beetle
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. Once you defeat him you'll receive the Gravity Well.

Blast Hornet

Power: 3400rp
Speed: 8600rp
Weakness:
Gravity Well
Special Weapon:
Parasitic Bomb
Blast Hornet
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. When you defeat him you'll receive the Parasitic Bomb.

You will eventually have to fight Bit and Byte as you proceed through the stages. You will fight Vile when you find the secret factory level which is hidden in each stage as a teleport panel. If you defeat these three bosses with a special weapon, you will not have to fight them again at the end of the game.

Bit

Power: 9400rp
Speed: 18000rp
Weakness:
Frost Shield
Special Weapon:
N/A
Bit
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.

Byte

Power: 18800rp
Speed: 8200rp
Weakness:
Ray Splasher
Special Weapon:
N/A
Byte
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.

Vile (Carrier)

Power: ???rp
Speed: ???rp
Weakness:
Spinning Blade
Special Weapon:
N/A
Vile
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.

Vile

Power: 9200rp
Speed: 7200rp
Weakness:
Ray Splasher
Special Weapon:
N/A
Vile
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.

The following bosses will be fought in Dr Doppler's lab. You will only have to face some of them according to the current status of Vile and Bit/Byte.

Junk Robot

Power: ???rp
Speed: ???rp
Weakness:
Ray Splasher
Special Weapon:
N/A
Junk Robot
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.

Godkarmachine O Inary

Power: 22900rp
Speed: 7200rp
Weakness:
Ray Splasher
Special Weapon:
N/A
Godkarmachine O Inary (Bit/Byte Combo)
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.

Doppler Octopus

Power: ???rp
Speed: ???rp
Weakness:
Triad Thunder
Special Weapon:
N/A
Doppler Octopus
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.

Vile - Goliath

Power: ???rp
Speed: ???rp
Weakness:
Parasitic Bomb
Special Weapon:
N/A
Vile - Goliath
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.

Vile

Power: 9200rp
Speed: 7200rp
Weakness:
Ray Splasher
Special Weapon:
N/A
Vile
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.

When advancing through Doppler's lab, you will have to fight all of the eight bosses again. Use the same tactics as before and you'll find that they are much easier to defeat the second time.

Dr. Doppler

Power: 17400rp
Speed: 18000rp
Weakness:
Acid Burst
Special Weapon:
N/A
Dr Doppler
This is it, the final battle against 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.

Sigma

Power: 19000rp
Speed: 19000rp
Weakness:
Spinning Blade
Special Weapon:
N/A
Sigma
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.

Kaiser Sigma

Power: 32000rp
Speed: 20000rp
Weakness:
X-Buster
Special Weapon:
N/A
Kaiser Sigma
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 cutscene will roll and Sigma will be destroyed by either Zero or Dr Doppler depending on whether or not Zero was damaged earlier in the game. Once Sigma is destroyed X and Zero will escape the lab and you will have finally beaten the game!
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