Requested by humatrix-X-24

When Aku, the shapeshifting master of darkness unleash an unspeakable evil, it's up to Humatrix to step forth and oppose him.

Humatrix

Intelligience

Unlimited knowledge of all martial arts in the world

Shapeshifting

Indestructible body

Willful biological control-enables Humatrix to control biology and DNA to become stronger

Information gathering sonar-allows him to gather information on the surrounding environmenr in the entire planet

Matter generatic- allows him to create anything out of atoms

Strongest material created- Matrixian Iron- indestructible as diamond, malleable as metal

Adaptable body

Imitating abilities

Self-improvement

Re-De-Flector- blast back attacks either physical, mental, melee, long range, magic or scientific upon making contact with his skin

Epidermal black hole- engulfs anything if it touches his skin

Touching scrouge- a highly deadly poison which works effectively if opponents made contact with his skin

All around evisceration- if anything is thrown at him, they get shredded into nothingness

Feats

Created Matrixian Iron, a material maleable like metal but indestructible like diamonds

Able to survive extreme temperatures of the sun

Survived getting hit by Mjonir(Thor's hammer)

Took 24 universe destroying bombs point blank and survived

Defeated both God and Satan

Used only one universe thread to pull the universe back together with minimal injuries

Weakness

No exploitable weaknesses but

Can only gain information in the form of samples

Cannot control his temper

Aku

Shapeshifting: Aku can change into virtually any form he desires, from a giant dragon to a small insect, or even a beautiful woman. He can also change his size, liquefy himself, stretch, and expand his body. He can also split into pieces to be in numerous places at once, with his consciousness inhabiting numerous bodies. He typically changes into animal forms during battle, such as a scorpion or an octopus, adapting to the situation. On one occasion, he also transformed into a huge, amorphous mass of darkness that greatly resembled the evil entity he had been spawned from, and could alter parts of itself at will.

Superhuman Physicality: Aku can alter his physical capabilities to virtually any level he needs or wants due to his magical shapeshifting abilities, and has manifested superhuman strength, speed, stamina, senses, and durability. No parameters or upper limits have been established regarding these capabilities.

Immortality: A significant aspect in the series is that Aku is ageless and immortal. He requires no sustenance, and cannot be harmed by conventional means: except by holy/godly magic or weapons imbued by it

Regeneration: While Aku is completely resistant to most forms of attack, he is not invulnerable; items such as Jack's sword or magics such as divine energy can damage the substance from which he is made. However, Aku is able to regenerate to a large degree even against attacks such as these; the magic or item will create large, burning holes or gashes in him that he can close back up with effort. However, his ability to regenerate in these situations is limited. In many of his confrontations with Jack, damage caused by the sword whittles away at his overall mass and ability to regenerate in the short term, until it tends to leave him as a very small animal of some sort, such as a frog or a mouse, at which point further attacks would presumably either seal him away as Jack's father did, or kill him as Jack intends to do. However, given a relatively short time out of combat, he will regain his former mass.

Dark Magic: Aku, being a demonic manifestation of a primordial evil, can utilize into various dark energies and magics. There appears to be little to no limit to the variation of his abilities. The powers he has demonstrated so far are:

Laser Eye Beams: Aku used this ability in numerous battles with Jack and he also used it to destroy the majority of Jack's Kingdom. He can also teleport beings through this ability.

Pyrokinesis:Aku can breath streams of fire from his mouth and project it from his hands. The fire is intense enough to disintegrate metal.

Scrying: Using mystical forces, he can create mid air images to spy upon Jack and other enemies. He seems to need to be aware of the existence of his foe before he can track them however.

Time Travel: This was the very ability that Aku used to send Jack into the future at the beginning of the series. Thus far it has only been used once and was a one way portal forward in time.

Teleportation: Aku uses this quite often to appear before those he has business with, such as the Imakandi.

Telekinesis: Aku has shown the ability to manipulate objects with his mind alone.

Object Materialization: The ability to create objects out of thin air. He once used this ability to conjure gold, jewels, and other treasures for the Imakandi.

Interstellar travel: Aku is capable of interstellar travel at at least the speed of light.

Necromancy: Aku has been shown in one episode to be capable of animating countless dead bodies, and bending them to his will.

Electrical Discharges: Aku is capable of combining his fire-breath and his laser-eye-beams to create blasts of electricity.

Weather Manipulation: Aku is capable of conjuring thunderstorms at will.

Premonitions: Aku, on at least one occasion, has been shown to have the ability to receive premonitions regarding his future through his dreams, which he can then act upon.

Earth Manipulaiton: Aku has demonstrated the ability to use his powers to manipulate the ground; for instance, causing in one case a giant rock wall to spring from the ground to hinder Jack.

Possession/Infection: Aku has been shown to have the ability to use small portions of himself to infect others with his evil, turning them into Aku-like thralls to serve him. This was seen in Jack, who was infected with small fragment that infected him within a day, and Ashi, as she and her sisters were greatly exposed to the essence while their mother ingested it. Aku also used portions of his essence to power machinery like with the Ultra-Robots.

Sonic Blasts: Aku is able to project waves of sonic force by shouting.

Martial Arts: Despite never having been shown to have trained at all in any form of martial art, Aku is a very skilled practitioner of hand-to-hand combat. Though not any sort of match for Jack, he was at least capable of defending himself reasonably well against Jack during their duel, while limiting himself to using only human capabilities. He is also shown to be a fairly skilled swordsman, as, on one occasion where he stole Jack's sword, he was able to force Jack (who was armed with a sword and shield) into a defensive posture during a bout of swordplay. However, it should be noted on that occasion that Aku was not limited in the scope of the powers he could employ.

Intelligence: He is as intelligent as he is powerful, and his cunning knows little end, from taking the form of a woman to trick Jack or manipulating various races into serving him. He has no remorse whatsoever about telling someone he will save their village if they obey his command, only to take back his word once he got what he wanted.

Feats

Wiped out the dinosaurs of Japan when he crashed down.

Thwarted Jack's attempts to return to his time for over fifty years, destroying every known time gate the samurai learns of.

Destroyed entire armies, villages and forests across the world and throughout the centuries; sometimes with little effort.This includes an army of Jack's allies; while they managed to free the samurai the large majority of the army was wiped out quickly.

Effortlessly obliterated the elderly Scotsman: a warrior who was once on par with Jack while in the prime of his life.

Effortlessly obliterated Scaramouche.

Killed The Guardian: a warrior who defeated Jack in a fair fight.Defeated the Giant Robo-Samurai with just one attack.

Weakness

Struggles against opponents of superior speed and skill. Aku has never defeated Jack, even while cheating.

Overly arrogant and prone to betray others he made deals with to suit his fancy.

Due to being a pure concentration of evil, Aku can be gravely harmed by weapons and attacks powered by pure goodness, which can negate his regeneration. [5] (It should be mentioned that Aku can survive several blows before being defeated; however every injury shrinks Aku in size)Once Aku suffers enough damage, the magical weapon can temporarily banish Aku.

Can be harmed by gods or divine beings.

While a master of disguise, Aku can be exposed due to his limited color scheme, his personality, and his reflection. Though Aku managed to outwit Jack when he assumed the form of Ikra, he was not to pull the same trick again while posing as a hermit seeking the power of the Titan Cronos.

Failed to regain the hearts and minds of the youth who began to idolize Jack.

Can get sick like any mortal, though it can make any fragment of his being into a virus that can consume whoever it infects and turn them into a thrall.

Learning that Jack will never age after removing any chance of him returning to the past, and samurai unable to be killed by his minions, placed Aku in an existential conundrum.While giving a fragment of his essence to the Daughters of Aku cultists, who revered him as a god, Aku unknowingly caused his eventual downfall.

Fight

Burning village

After a long invasion, Aku's army has once again, won a war.

Houses were burning, people are screaming and rebels are executed by Mantoids.

In the midst of the destruction, a doll lies on the ground, dirty and tattered.

All of a sudden, a giant metallic insectoid foot stamps on top of it, crushing the doll.

The Beetle Drone scans the area, securing it's location.

As it was scanning, all of a sudden, something slams on top of it, causing it to explode.

Alarmed, the Beetle Drones turns around to investigate.

A black and orange humanoid creature stood up and it faces the Beetle Drones.

As it looks around the burning village, the creature turns to face the Beetle Drones and it said to them.

???: You're gonna pay for what you did.

The Beetle Drones charges forward but the creature began creating a giant cannon out of nowhere and it fires a powerful atomic blast, incinerating the Beetle Drones.

As his enemies are disposed off, Hunatrix began using his Sonar to collect information of the Beetle Drones

So far, there is an evil being in a castle not far from here, a dark shapeshifter and a shogun of terror.

He is no other than Aku, the shapeshifting master of darkness.

Throughout the years, the people feared him, thinking him unkillable due to Aku's lack of weaknesses.

But contary to what most of them thinks, Aku has a weakness.

A lone samurai whom they call Jack, wields a magic sword blessed by the magic of the Earth Gods, Odin, Ra and Vishnu is the only weapon capable of harming Aku.

With that knowledge gained, Humatrix began emitting the same godly magic present in the sword and he began flying towards the castle to confront Aku.

Aku's castle

Aku sat on his throne, feeling bored.

That samurai hasn't shown himself for a very long time, causing Aku to feel restless.

A naughty thought strucks Aku and Aku began picking up a phone to dial a tech support company.

Ring ring.

After waiting for a while, a feminine voice could be heard from across the phone.

???: Um...promagrande computer tech support, I'm here to make you happy.

Aku: Yes. I would like to order a computer.

???: Okay sir. Can I have your name?

Aku: Aku.

???: Oh. So how would you like your computer.

Aku snickers mischieviously before he yells out.

Aku: EXTRA THICC!!!!

Aku immediately hangs up and he began laughing to himself when all of a sudden, he heard a massive explosion from outside.

Aku turned and he saw a black and orange humanoid floating outside his castle.

But what shocked Aku the most is the huge mess of destroyed Beetle Drones behind the figure.

Aku narrows his eyes and he questions.

Aku: Who are you?

Humatrix answers Aku's question.

Humatrix: I am known as Humatrix and for your sins, I have come to destroy you.

Aku snorts and he bursts out laughing.

Aku: Destroy me? You must be joking.

Without warning, Humatrix suddenly sped forward and he morphs his arm into a blade and he slashes across Aku's body.

Aku screams in pain and he exclaims in disbelief.

Aku: What?! That feeling! It's like that sword! How is that possible?!

Humatrix explains to Aku.

Humatrix: Simple really, I collected enough information about you and knowing about your weakness, I began emitting the same aura, enabling me to kill you.

Aku narrows his eyes and he said.

Aku: You won't be able to do so if I do this!

Aku fires a crimson laser eye beam from his eyes.

Humatrix dodges the attack and he turns just as Aku leaps towards him.

Aku transforms into a giant scorpion and he throws forward his stinger but Humatrix deflects the blow with his claw.

Aku then transforms into a bat and he swoops down, ramming into Humatrix.

Aku reverts back into his original form and he punches Humatrix, but upon making contact with his skin, Aku's fist began flying back into his face, punching him in the process.

Aku then moves back and he fires another blast of his laser eye beam at Humatrix but Humatrix has a trick up his sleeve.

Humatrix narrows his eyes and almost immediately, he too began firing laser eye beams back at Aku.

The two beams struck each other, creating a beam clash.

Humatrix concentrates and he forces more power into his laser eye beams, pushing back Aku's attack.

Realizing he's in trouble, Aku shrunk down into the size of a human, dodging the blast in the process.

Aku grabbed a Beetle Drone and he hurls it at Humatrix, but Humatrix simply touches the Beetle Drone with a finger and suddenly, a black hole began engulfing the Beetle Drone, crushing the insectoid droid's armour in the process.

Humatrix morphs his arms into razor sharp blades and he flies down towards Aku, preparing to attack.

But before he could reach him, Aku inhales a large amount of oxygen before he unleashes a loud scream, blowing Humatrix back. 

Aku then transforms into an octopus and he stretches out his tentacle, wrapping it around Humatrix.

Humatrix morphs his blades back into claws and he impales it into Aku, attempting to poison him.

However, Aku just simply screams in pain and he slams Humatrix down hard onto the ground.

Aku moves back and he pouted.

Aku: Hey! You can't just poke me like that!

Humatrix got up and he exclaims.

Humatrix: That poison should have worked in you. Why ism't it taking effect?!

Aku laughs and he said.

Aku: Fool. Such attacks won't work on me. Now you will die!

Aku transforms into a bird and he swoops down to attack Humatrix, but Humatrix transforms into an octopus and he whips a tentacle, slapping Aku down.

Humatrix morphs back into his humanoid form and he began creating a giant anvil made of Matrixian Iron.

As Aku charges forward, Humatrix jumps over him.

Aku blasts a stream of fire from his flaming eye brows, burning Humatrix.

But Humatrix simply regenerates from the attack and he throws the anvil down onto Aku.

The anvil slams on top of Aku's head and Aku clutches his head, screaming in pain.

Humatrix jumps down and he began punching Aku in the face. 

Aku strikes Humatrix in the guts before slamming him onto the ground.

But Humatrix began forming a black hole, causing it to engulf Aku's hand.

Aku yells out in shock and he moves back.

Aku quickly detaches his black hole engulfed hand and he throws it back at Humatrix.

But just as it closes it, all of a sudden, the black  hole engulfed hand began shredding, shredding until there's nothing left.

Aku widens his eyes in shock and he thought to himself.

Aku: That guy's stronger than I thought. I better get out of here!

Aku then began to transform into a morphing shape and he began leaping away from Humatrix.

Not willing to allow him to escape, Humatrix began persueing Aku.

Aku turns and he blasts both his fire and laser eye beams together at Humatrix, creating a powerful electrical blast.

Humatrix simply flies into the blast, deflecting the electrical blast back to Aku.

Aku dodges the attack and he bounces back towards Humatrix.

Aku then reverts back into his normal form and he began using his necromancy ability onto the ground.

Humatrix watches in shock as dead bodies began rising from the ground, roaring at him.

Aku points a finger towards Humatrix and he orders his army of zombies.

Aku: Destroy him!

The zombies roars and they began running towards Humatrix but Humatrix sped past them, slashing his claws at the zombies.

The speed and accuracy Humatrix poccesses in the swings are unbelievable!

Zombies are shredded into nothingness, every sub atom in their body have been cutted and torn.

Aku stares at Humatrix in shock and he blasts a stream of fire at him.

Humatrix simply flies up, dodging the fire, causing the fire to burn the zombies instead.

Both Humatrix and Aku watches as the undead army began burning until every last of them turns into ashes.

Aku and Humatrix glares at each other before Aku began morphing into the form of a human.

Aku then conjures a sword out of thin air and he sneers at Humatrix.

Humatrix too, began conjuring a sword and he got into a fighting stance.

Both Humatrix and Aku glares at each other before the two charges towards each other,

The two shapeshifters began clashing with their swords, trading blows with every swing.

Aku dodges Humatrix swing and he stabs the sword, but Humatrix leaps over him, dodging the attack.

Aku then throws the sword into Humatrix, striking him in the chest.

Aku began laughing to himself, thinking he had won.

However, his victory was short lived.

Humatrix charges forward and he screams as he drove the sword right into Aku's chest.

Aku then tranforms into a tiger and he pounces on top of Humatrix.

But Humatrix transforms into a lion and he wrestles Aku down.

Aku morphs into an alligator and he sank his teeth into Humatrix's neck.

But Humatrix morphs his body into an anaconda and he began wrapping his serpentine body around Aku, constricting him.

Aku morphs into an eagle and he flies above Humatrix.

Humatrix transforms into a falcon and he flies after him.

Aku transforms into an orang utan and he slams his body into Humatrix, knocking him down.

But Humatrix transforms into a gorilla and he throws a punch, knocking Aku back.

Aku morphs into a rhinocerus and he charges forward, ramming headfirst into Humatrix's chest.

Humatrix morphs into a hippotamus and he opens his jaws, sinking his teeth into Aku.

Aku morphs into an elephant and he lifts his body up, causing Humatrix to fall.

Aku then charges forward and he rams into Humatrix, knocking  him down.

Aku then lets out an elephantine trumpet before charging forward.

But Humatrix morphs into a Tyrannosaurus rex and he swerves aside, dodging Aku's attack before sinking his teeth into Aku's back.

Humatrix throws Aku into a wall and he lets out a loud mighty roar before charging forward.

But Aku transforms into a Spinosaurus and he swung his tail, knocking Humatrix back.

Aku then lets out a roar before he bites into Humatrix's neck.

Humatrix roars in pain before Aku throws him down.

Humatrix quickly transforms into an Anklyosaurus and he swung his club tail, knocking Aku back.

Humatrix then transforms into a Triceratops and he charges forward, ramming headfirst into Aku's body.

Aku screams out in pain before he falls onto the ground.

Humatrix jumps up and he morphs into a whale before falling on top of Aku, seemingly crushing him.

However, it would take more than that to defeat Aku.

All of a sudden, Humatrix felt his entire body moving up and his eyes widens as Aku began lifting him up.

Aku screams out in fury and he throws Humatrix across the castle.

Humatrix morphs back into his humanoid form and he scratches the ground, stopping himself midfall.

Aku glares at Humatrix and he shouts at him.

Aku: I have enough! I shall destroy you!

Aku then began concentrating causing the entire castle to shake.

Humatrix watches in shock as the ceiling began to crumble, causing debris to rain down from above.

Humatrix simply creates more black holes, destroying the rubble in the process.

Aku then detaches a piece of himself and he throws it at Humatrix.

The piece struck onto Humatrix and it began to spread like a cancer, trying to corrupt him.

However, such attacks won't work on Humatrix.

All of a sudden, the Aku piece began getting shredded by an invisible forcing, shredding the piece until there's nothing left.

Humatrix glares at Aku and he said.

Humatrix: You're done.

Aku narrows his eyes and he said to Humatrix.

Aku: You may have bested me, but I shall destroy you in the near future.

Humatrix: There is no future for you Aku!

Aku narrows his eyes and his mouth twists into a grin and he said.

Aku: We shall see.

All of a sudden, Aku opens his mouth and he began creating a magical portal out of his mouth.

Aku is planning on sending Humatrix into another timeline.

However, Humatrix is not that easy to fool.

All of a sudden, Aku felt something sharps impales right through his neck ,causing him to scream in agony.

Aku looks down and he widens his eyes upon seeing Humatrix below him with both blades into Aku's throat.

Shocked, Aku croaks out.

Aku: H...how? How did you know what I was going to do?

Humatrix then explains.

Humatrix: I managed to gather enough information about you before the fight and knowing that you had used that technique to send that Samurai to this timeline, I decided to play along, knowing that you would have let your guard down performing that attack. So now that you have been weaken by me, I can finally kill you!

Humatrix then kicks Aku back and he creating a sword out of Matrixian Iron.

Humatrix closes his eyes and he began concentrating, causing a blue energy to form around the blade.

Aku gasps in shock and he began backing away in terror.

Humatrix then screams in anger and he charges forward.

Before Aku could even react, Humatrix swung the sword, cutting into Aku's body.

Aku moves down and he morphs into a giant dragon, flying up with his jaws wide open, attempting to swallow Humatrix whole.

But Humatrix flies down and he swung his blade down, slicing Aku into half.

The two parts morphs into smaller Aku heads and Humatrix slashes his sword at one of them.

The Aku head disintergrates as Humatrix cuts him down until every molecule of Aku has been destroyed.

The last Aku head began wriggling away in a last attempt to flee with his life.

But Humatrix turns and he said.

Humatrix: Not this time.

 Humatrix jumps up and he just as he brought his sword down, Humatrix said to Aku.

Humatrix: Don't dream of ever resurrecting again you scum.

Time seems to slow as the blade stabs right through Aku's head and almost immediately, the blade began absorbing Aku, transforming the blade pitch black.

Humatrix screams out in anger and he slams the sword onto the ground, causing the darkness of Aku to spread across the castle ground.

Humatrix fires a laser eye beam at the wall, creating a massive hole.

Humatrix flies out just as the castle began exploding.

Humatrix lands outside the castle and he watches in solemn silence as the castle began crumbling and exploding until every last brick of the castle has fallen.

Humatrix sighs to himself and he said.

Humatrix: It's over. This world is finally rid of this evil.

Humatrix then began flying off.

It's time for him to go home.

As Humatrix left the battlefield, a tall Samurai wearing a white gi and a young attractive girl wearing a blue and green prison uniform walks towards the ruins and their eyes widens in shock upon realizing that Aku is dead.

KO!

The winner is

Humatrix

Advantages and disadvantages

Humatrix

Smarter

Faster

More agile

More durable

Better range of attacks

Able to adapt to Aku's powers

Has gained enough knowledge about Aku's weakness to defeat him

Capable of doing anything

Able to deflect anything Aku throws at him

Better martial arts skills

Immune to the Aku possession

Can still be thrown around by Aku

Physically weaker

Anger can sometimes get the best of him

Poison does not affect universal entities with no body systems

Aku

Physically stronger

More strategic

Time portal would have sent Humatrix to another timeline

Immune to toxins

Able to regenerate from Humatrix's attacks

Slower

Still have limits

Despite his regenerative ability, Aku is not invulnerable

Normal attacks can still harm him

Arrogant

Underestimates his opponent a lot

Weak against God Magic emitted by Humatrix

Tends to let his guard down

Victory quote:

Humatrix: If anyone dares to defy my home world or it's residents whether human, animal or plant, I will protect it against all odds. Even if I start to bleed I never yield. And that's a promise.

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