(A/N: Before we get to the battle, let me explain a few things about Mirage Mewtwo. First, he possess every Pokémon attack there is, even those exclusive to a single Pokémon or species. Second, his power is at it's highest peak. In game terms, he's at level 100 with his HP, PP, stats, etc are all at their highest point, as if you've doped up your Pokémon on Calcium, Iron, etc until the items are no longer affective. Lastly, he has all immunities. For example, the way a Rock Pokémon is immune to electric attacks, the way Dark Pokémon are immune to Psychic attacks, the way Ghost Pokémon are immune to physical attacks, etc, so is he. Even for the attacks that do affects him, at most they would simple be "Not Very Effective", since he possess the resistance types to them. However, to give Mewtwo a fighting chance, Dr. Yung has turned off these immunities to make the battle a bit more fair. All the same, he's still a massive power house of strength and abilities. It's going to be one doozy of a battle.)
Disclaimer: I own nothing
Chapter 13: Battle of the Abominations
The Shadow Ball he threw was blocked as Mirage Mewtwo threw his own, the two attacks exploding against each other. From out of the cloud of smoke, Mirage Mewtwo came speeding towards Mewtwo, landing a Skull Bash against his head.
Mewtwo went flying backwards, slamming into a tree as Mirage Mewtwo fired a Bullet Seed attack at him. Dazed, Mewtwo put up his psychic barrier, the seeds dissolving as they struck against it. Mirage Mewtwo teleported over to him and raised its hand, its chubby spherical fingers growing claws of shadow as it struck Mewtwo with its Shadow Claw, the Dark attack going straight through his shield.
Dropping his shield, Mewtwo's fist shot out as he performed an Ice Punch. Mirage Mewtwo stumbled back, its head encased in ice. Whirling around, he followed up with an Iron Tail, knocking the Mirage Pokémon away from him, then used Gravity.
Mirage Mewtwo dropped to its knees as the gravity around it increased tenfold. Mewtwo smirked, but his smile faded as Mirage Mewtwo rose to its feet within the intense gravity. The ice around its head shattered as a Fire Blast raced towards Mewtwo. He teleported out of the way, the attack completely reducing the tree he'd been standing in front of to ash.
He reappeared in the air, and Mirage Mewtwo was suddenly behind him. He spun around, using Low Kick, but Mirage Mewtwo dodged and made contact with Mewtwo's jaw with a Mega Punch, sending him speeding to the ground. But before he hit, Mirage Mewtwo teleported to his side again, wrapping his arms around him and performing a Seismic Toss.
A dust cloud rose as Mewtwo hit the ground. Dr. Yung waved it out of his face, smiling. "Down already? I knew my Mirage Mewtwo was stronger than you, but I did expect you to put up more of a fight."
At Mewtwo's mental command, the cloud of dust parted. "This battle has only just begun."
Mirage Mewtwo appeared behind him, its hand having shaped itself into a Kingler claw as it used Guillotine. Mewtwo teleported a distance away and threw a Shadow Ball. Mirage Mewtwo copied him, teleporting away and using Flash Cannon, only to have Mewtwo disappear on it.
It went on like a game, teleporting and attacking. Finally, Mewtwo put up his psychic barrier rather than teleporting away. Once Mirage Mewtwo's attack exploded against his large blue sphere, he sped at the Mirage Pokémon, only to crash into Mirage Mewtwo's own psychic sphere.
They pressed against each other, separated by their shields, each attempting to push the other back before shooting straight up into the sky and breaking apart. With their shields up, they repeatedly collided with each other in a mimicry of Mewtwo's battle with the Mew he faced back on New Island. That is, until Mirage Mewtwo managed to get above him and began repeatedly slamming into him, knocking him closer and closer to the ground.
Upon crashing to the forest floor, a shock wave infused with psychic energy spread outward, tearing up the ground and knocking over trees. Mewtwo attempted to rise, but Mirage Mewtwo kept him pinned down as it pushed against his shield.
Mewtwo dropped his barrier and teleported up into the sky. He threw a Shadow Ball down at Mirage Mewtwo, the Dark attack meant to go straight through the Mirage Pokémon's psychic barrier. But Mirage Mewtwo dropped its shield and used Light Screen. It shattered, but succeeded in stopping Mewtwo's attack.
Gathering energy, Mirage Mewtwo threw a Draco Meteor into the air. It exploded, sending numerous flaming meteors at Mewtwo. He didn't retreat, but instead raised his hand, sending the meteors down at his opponent. Mirage Mewtwo simply flew straight through the fiery storm, maneuvering around the meteors as it headed for the genetic Pokémon. Mewtwo's eyes narrowed and raised his hand, gathering energy from the sun and firing a Solar Beam.
Mirage Mewtwo teleported behind Mewtwo and used Psystrike, his psychic power exploding outward. Mewtwo went flying, and not of his own volition. Mirage Mewtwo teleported into his path and used Hi Jump Kick, its foot colliding with Mewtwo's chin, causing him to backflip in the air.
Shaking it off, Mewtwo created a Shadow Ball. Mirage Mewtwo did the same, and they threw them at each other. The attacks collided and exploded, the shock wave pushing back the two Pokémon. They came together again, both using Zen Headbutt. The impact sent out a shock wave so intense that the trees of the forest swayed for miles.
Heads still pressed together, the two stared at each other, Mewtwo with righteous fury in his eyes, Mirage Mewtwo with blank lifelessness. Mewtwo pulled away first and threw another Shadow Ball. To his surprise, Mirage Mewtwo split into five copies as it used Double Team. His attack hit the middle one, which disappeared, obviously an illusion. The remaining four began flying around him before attacking at the same time, all using Cut.
Mewtwo grunted, but lost track of whichever one had actually struck him, knowing only the real one could actually attack. They came together again, and he quickly put up his psychic barrier, but this proved to be useless as Mirage Mewtwo used the Dark move Shadow Claw.
As they came at him again, he used Psystrike, the explosion of psychic power forcing Mirage Mewtwo to put up its shield while its copies vanished. It immediately dropped it and sprayed Water Pulse from its mouth while using Thunderbolt.
Mewtwo's eyes widened. It could use more than one attack at a time? The electric attack was drawn to the water, making it an electrically charge spray. He was about to deflect the attack, but Mirage Mewtwo's eyes flashed with a blinding light as it used Flash. Mewtwo's hands went to his own eyes as Mirage Mewtwo teleported above him and used Volt Tackle, sending Mewtwo crashing to the ground.
Lying in a crater, Mewtwo struggled to get to his feet. This couldn't be happening. How could he, Mewtwo, possibly be losing? He was stronger than any other Pokémon, especially some stupid hologram imitation.
Looking up, he saw the Mirage Pokémon coming down at him and teleported a distance away as Mirage Mewtwo's Giga Impact cracked the ground. His vision was returning, and he fired a Hyper Beam. Mirage Mewtwo held up his hand and sent it back. Mewtwo did the same, and the attack bounced back and forth between the two.
Mewtwo took a step forward, then another, closing the distance between them. Mirage Mewtwo copied him as they continued to send the attack back and forth between them. When they were but a meter away, their hands outstretched to push back the Hyper Beam, the energy gathered together into an unmoving ball before finally erupting, the explosion throwing both Pokémon back.
Mewtwo was ready for more, but what he was not ready for was to see the heads of different Pokémon to begin sprouting on Mirage Mewtwo's body like a bunch of tumors. Each head fired a different attack, and Mewtwo found a Sacred Fire, Dragon Rage, Aeroblast, Thunderbolt, Shadow Blast, Hydro Pump, Hyper Beam, Psychic, Solar Beam, and Dark Pulse come at him. It seemed that Mirage Mewtwo not only had all attacks available to it, but could also use several at once. He was so caught off guard that he didn't react in time before he was blown off his feet.
Covered in wounds and in great pain, he climbed to his feet. Mirage Mewtwo was staring at him, the other Pokémon heads no longer present on its body. Mewtwo scowled and used Recover, healing himself. Mirage Mewtwo simply cocked its head to the side and began walking towards him.
Mewtwo used Telekinesis, his blue psychic aura appearing around Mirage Mewtwo. The Mirage Pokémon's movements stopped for just a moment before it began walking once more at a slower pace as it used Telekinesis on itself to counteract Mewtwo's. It suddenly rushed at him and used Mega Punch. Mewtwo quickly used Metal Coat, and Mirage Mewtwo's fist bounced off his body, striking the Mirage Pokémon in its own face, causing it to stumble back.
Dr. Yung laughed. "Very amusing, Mewtwo. I think that's the most you've managed to damage my Mirage Mewtwo yet." His smile became more sinister. "But I think its time you saw its most powerful attack. Mirage Mewtwo, use Ultimate Hyper Beam!"
Mewtwo had never heard of such an attack, nor did he recognize the technique as the Mirage Pokémon raised its hand in the air and energy began gathering in its palm. It took several seconds to charge, but soon Mirage Mewtwo held a ball of energy that seemed to contain every color in existence swirling together. They were small, but Mewtwo could have sworn he saw the silhouettes of different Pokémon floating around in the ball of energy.
Mirage Mewtwo lowered its arm and thrust the ball of energy forward. It erupted in a powerful beam of rainbow colors surrounded by white rings. The attack sped towards Mewtwo at great speed. His first instinct was to send it back, but he detected Dark energy in it, meaning he wouldn't be able to reverse or deflect it, nor would he be able to block it with his shield. There was no time to dodge either, but he did manage to teleport out of its path.
The beam kept going, tearing a path straight through the forest that uprooted trees and left a deep groove in the ground. It continued onward towards the mountain in the distance. There was a blinding flash of light and a deafening boom. Mewtwo was blinded as he felt the shock wave from the blast even from where he was.
When the light faded, the entire mountain was gone, and a massive crater and giant mushroom-shaped cloud were in its place. The mountain, an entire mountain, had been destroyed. It had been completely obliterated, and the destruction surrounding the crater was immense.
Mewtwo looked on in horror at the land. He couldn't believe what he had just witnessed, nor could he believe Dr. Yung had actually allowed this to happen, let alone command it to do something so horrible. How many Pokémon had been on that mountain? How many in the surrounding area had gotten caught up in the blast? How would this destruction affect the ecological balance of the forest?
"What have you done?" he whispered in disbelief.
Dr. Yung smirked. "Do you like it? It's an original attack I invented. I created it by combining every Pokémon attack there is into a single beam. I call it the Ultimate Hyper Beam. And since it contains energy from every type of Pokémon, no mater which Pokémon it's used on, it'll be super effective."
Mewtwo turned away from the destruction and glared at him, his eyes burning with anger. "You are a monster. A monster! Not even Team Rocket caused such reckless destruction simply to show off their power."
Dr. Yung laughed. "Team Rocket is nothing but a pipe dream. They're small time compared to me. With Mirage Mewtwo by my side, world domination is not just a dream, it's a possibility. No, it's an inevitability!"
"Never," Mewtwo seethed. "I will never allow such a thing. You will pay for what you have done, and I will begin by disposing of your precious creation."
His body began glowing as if it were on fire. The flaming light quickly dispersed, and he now stood in his X form. Dr. Yung's mouth dropped open in surprise. This hadn't been in the Pikachu's memories.
Mewtwo teleported beside Mirage Mewtwo and used Iron Tail, sending the Mirage Pokémon into the sky. He switched over to his Y form and flew after it, moving so fast he left a trail of after images behind. He slammed into Mirage Mewtwo with a Zen Headbutt, then used Psystrike, knocking his opponent away.
He teleported into his foe's path, switched to his X form, and used Drain Punch as Mirage Mewtwo flew right into his fist. He followed up with a Fire Punch, a Thunder Punch, and a Low Kick, sending the Mirage Pokémon flying again, then switched back to his Y form to throw a Shadow Ball before teleporting into Mirage Mewtwo's path again and using Psyshock, timing it so both balls of energy hit his opponent at the same time on either side to create an explosion of Dark and Psychic energy.
He wasn't anywhere near finished yet. Teleporting above Mirage Mewtwo, he used Aura Sphere, letting the attack push his opponent back down to the ground. Before the dust even settled, he followed up with a series of beam attacks, including Hyper Beam, Signal Beam, Solar Beam, Charge Beam, and Ice Beam that he fired down and Mirage Mewtwo.
Dr. Yung was stunned. Not only did Mewtwo have two Mega Evolutions, he had used them to get the upper hand on his Mirage Mewtwo. Quickly, he began typing furiously on his computer.
From within the dust cloud, Mirage Mewtwo stood. With a wave of its hand, the dust cloud dispersed, and it looked at Mewtwo. But not for long as Mewtwo teleported directly in front of it, changed to his X form, and used Power-Up Punch, his fist slamming into the Mirage Pokémon's gut repeatedly.
Mirage Mewtwo was pushed further and further back with each blow until its back was against a tree, and Mewtwo's final punch hit the Mirage Pokémon with such force that the tree behind it broke in half. Mewtwo then grabbed it and threw Mirage Mewtwo away from him, switched over to his Y form, and used Aerial Ace. His body became engulfed with light as he sped towards Mirage Mewtwo, slamming into it before coming in again from a different direction, repeating the process several more times before Mirage Mewtwo managed to put up its shield.
But Mewtwo didn't hesitate before throwing a Shadow Ball that passed right through Mirage Mewtwo's shield, sending it crashing into a tree. And before it even hit the ground, he used Grass Knot, the grass growing and wrapping around the Mirage Pokémon, binding it to the tree.
Mewtwo turned to Dr. Yung. "It seems your so called masterpiece can't measure up to the real thing after all."
But Dr. Yung just laughed. "You think that just because you briefly got the upper hand that you've won? Don't be foolish. I must admit though, you really surprised me. I never would have guessed that you had a Mega form, let alone two."
"My X and Y forms," Mewtwo confirmed, unknowingly using the names Mew had given them. "It seems when you read Pikachu's mind it was before I obtained either of my Mega forms."
"So it seems," the doctor agreed. "I was lacking all the facts. But no matter. You've given me everything I need."
Mewtwo's eyes narrowed. "What do you mean?"
Dr. Yung waved his hand, gesturing to the area around them. "Just look around you. My computer has generated a data field a mile wide to give my Mirage Mewtwo free range. But it doesn't only allow my Mirage Pokémon to manifest, it also reads and records the data of everything in it. It scanned you, Mewtwo, feeding me all the information of the battle, allowing me to learn a great deal about you, including your X and Y forms as you call them."
He began typing again, looking at the new data. "It seems your X form increases your physical strength and defense while your Y form increases your psychic power, special defense, and speed. And the way you used them in battle was very impressive. You switched from form to form depending on what attack you were going to use to get the most out of them. Excellent strategy." His grin widened. "But in the end, you've only benefitted me."
Mewtwo sensed movement behind him. He turned to see Mirage Mewtwo tear free from its bindings. A moment later, it used Recover, undoing nearly all the damage Mewtwo had inflicted upon it.
Dr. Yung was typing furiously at his computer. "It's time for an upgrade." He made a dramatic display of hitting a button. "And… execute!"
Mirage Mewtwo's body pixelated. The pixels moved about and reformed into Mirage Mewtwo again, only it had changed. It now stood as a cross between Mewtwo's X and Y forms. The head was that of his Y form, while from the neck down was that of his X form, only its hands and feet still contained the color patterns of his Y form rather than being all white, and it had the two tubes coming out of the back of its head and attaching to its shoulders. It still had its Shiny colors, only its eyes, rather than being red like its Y form or blue like its X form, were a golden yellow.
"Say hello to Mirage Mewtwo's new permanent form," said Dr. Yung. "And since it's a Mirage Pokémon, it can stay in its Mega form indefinitely. And with its X and Y forms combine, it gains the increase of speed, strength, defense, special attack, and special defense that both your forms get. I think I'll call this new form its Z form."
His grin bordered on sadistic. "That's no longer any hope for victory for you anymore, my friend, not that there was any to begin with." He pointed at the genetic Pokémon. "Now, my Mega Mewtwo Z, show this obsolete fool your power!"
(A/N: For the first time in his life, Mewtwo is out of his league. He managed to gain the upper hand by switching back and forth between his X and Y Mega forms, but he just lost that advantage. I've seen a lot of fan-art where people have combined his two forms, usually by taking the head of his Y form and putting it on the X form's body, so that's where this came from. The fan-term for the new form is almost always his Z form, which I suppose makes sense. In any case, that's where this comes from. Not that original, but in my defense, I had envisioned Mewtwo's Z form long before I saw any art for it. Then again, I guess practically everyone had. Stay tuned to see how Mewtwo fairs against his already stronger than him copy's even more powerful form.)