Welcome. To FoxOnPie's Multiverse. But wait, I am not FoxOnPie.
….Well yeah, he allows for spinoffs based on his 'Neither a Bird nor a Plane, it's Deku' universe in an entire multiverse of MHA mashups. But we are not necessarily in that today. We are in THE DARK MULTIVERSE!
Where stuff that isn't necessarily DC can show up, which is where we are today. But a few things before we begin.
One, an apology. This story is a giant fight of two experienced Omnitrix using Izuku Midoriyas or in the POV of someone who can just refer to an alien by species name without really noting anything else about it, and while I do try to give some description for those unfamiliar with what forms are using in the main part of the story I'd probably double it giving the forms a proper description. I had originally written this on Spacebattles with links, but then half the links died and it doesn't really work for FFnet. I'd probably need to make the story twice as long to properly describe the forms, and it is already a bit big as is. So as a compromise I'll have a 'forms used' list on the end for both Izukus that can be used to look up later.
Second is that the Izuku who appears as the Good Izuku is one I am already writing adventures for. However I want to finish one more chapter before posting as the two I have finished both end on somewhat...tricky cliffhangers. Though outside of Spacebattles you'll get the first real look at this guy, reborn from the original Izu-Ju story I tried into a more polished form.
Third is that the Omnitrix aliens go beyond canon ones: along with some obscure writer/creator created forms a few forms come from not just the excellent Five Years Later by the Ink Tank (which I have permission to use), but also my own story's crossover elements. I'll clarify the exacts a bit more clearly in the final rosters.
Anyway with that out of the way, let us begin with one last bit. The Dark Universe.
The Multiverse is made of up choices, all that nearly everyone can logically make. A shift in the gametes altering one's gender or quirk. A choice to make or not make something. A death by chance guiding another down an alternate path. The Multiverse is many and vast. However there is something else.
The choices that could be made, but are so beyond the pale or illogical they are not logically made. They are the things of nightmares and paranoia, worlds that should not exist and are terrible when they do. This is the Dark Multiverse, the Multiverse under the Multiverse. A constantly forming and unforming realm of corruption. A prison whose prisoners rarely know they are trapped in, or that their existences should never have been.
Planet Xenon
Earth/Universe -112619
They were all living in a nightmare, it was just that few of them realized it. He knew it because of his vast intelligence, the smartest being in three to five galaxies. The poor souls on the planet Earth knew it a bit less exactly than he did, but in sheer first-hand experience.
They were the center of the nightmare, the source of the rot that infected everything. The rot had gotten in because of his own actions, and it wouldn't end until it was stopped. But it was beyond not just his willingness to stop it now. He no longer could actually stop it. The nightmare had infected everything.
There were only indirect methods of ending the nightmare that could be employed.
His bio-suit deployed in case this one was just as bad he finished the work on the great gateway to the beyond he had built, and with a final push of the button the gate shimmered with green light. It grew brighter and brighter as it pushed farther and farther, until eventually the light peaked in a blinding burst. Through his suit he could see a shadow appear in the light. Bipedal. Somewhat underdeveloped. Hair like some sort of edible vegetation. On his arm was his very creation itself, morphed into a smaller and sleeker configuration. The Omnimatrix, what was supposed to have brought the universe together and save species.
In the nightmare it had only done the opposite.
Eventually the light was fully gone, and the colors of the one who had his device in a world beyond the nightmares was clear. He looked the same as the one who had it here: a pubescent human with big green eyes. But the eyes were not warped the way they were in the nightmare.
"...Huh?!" the uncorrupted one was looking around his remote lab in confusion and shock, clearly discombobulated. "This isn't the store?!"
"What was the first clue? The complete change in topography and lighting, the different atmosphere composition, or the blinding light?" The Omnitrix on the human's arm beeped an audible response. Curious, his counterpart gave his Omnitrix a fully sentient artificial intelligence capable of speaking? Not something he'd have done.
Eventually the human, still looking around the room frantically, noticed him and freaked out in a display of shock upon seeing him.
"I am Azmuth, creator of the Omnitrix." He declared to the human, who looked rapidly between himself and his suit.
"You did?! You made it!? That's amazing! Really it is. It's been an amazing gift that's allowed me to do a lot of good and I hope to do a lot more good with it unless you are actually here to take it back because if that is the case I'd have to beg you not to because I need it to save people and stop this villain named All for One..."
"He didn't make me." The Omnitrix on his arm beeped, silencing the human's spilling of insistent language.
"Huh?"
"Yes and no. I created the Omnimatrix of this universe, while yours was created by the Azmuth of your own reality. I've summoned you to my own for a purpose that only another user of my device can hope to achieve."
With a gesture he brought up a holographic video, displaying a pod in a trash heap on a beach.
"That's Dagobah beach before Miyako cleaned it up." the other Izuku Midoriya, for that was the human's name, observed dumbly. He didn't respond as the second Izuku Midoriya, the one of his nightmare, appeared and kicked the metal sphere, before screaming in pain.
The Omnitrix pod opened and the watch hopped onto the panicking human in the recording.
"Wait he got it then and there? The Omnitrix I have landed when I was 10 in a forest after I wished on a star." The Izuku from outside of the nightmare added on a pointless detail about wishes.
"This is not your reality, things happened differently here. What happened was instead a nightmare."
After some time freaking out and panicking about the device, in its original setting, latching onto his wrist the Izuku in the recording eventually turned into a Conductoid, and after a bit more panicking at the resulting transformation, eventually started relishing in the sudden power he had.
"I don't recognize that one, but I remember when I first transformed. I turned into Diamondhead and had a lot of fun."
"He frolicked in the forest skipping while turning his arms into various weapons and punching rocks" The Omnitrix with a personality program quipped.
The Izuku in his cave had a look of concern as the sound of a radio communication about backup was ignored to have the other him continue to blast things with electricity and slam things with his tentacles.
"...I wouldn't have ignored that. I couldn't. I mean I'd be breaking the law, but if someone needed help and I did nothing..."
'I wouldn't be me' was what the human was going to say he was sure.
Eventually the transformation ended and the teenage human in the recording was back, his entire body trembling in horror and shock.
"No! No! I cannot go back! I cannot be a weak, worthless, quirkless human! Give me back my power! Give it back!"
The source of the nightmare proceeded to wrestle and struggle against the Omnitrix, who hissed and reacted with the negative beep of recharge mode. As the other Izuku struggled with it the radio spoke of a dead student and maimed pro heroes.
Eventually the Omnitrix reactivated and the Izuku in the recording changed again, this time into a Galvan..
"That's Grey Matter. I know what he does, he's a really smart little frog. Not sure why he's in a different outfit than mine though."
As a 'really smart little frog' he didn't comment. The nightmare Izuku meanwhile was fiddling with the Omnitrix symbol on his back.
"This one may not have any electrical power, but I am smart! So smart! I can understand this device and what it is doing, and I can see its flaws. All of the flaws! I can make it better! I can make it so that I am never weak again! No more quirkless, no more worthless, no more Deku!"
The radio was shouting horrible things about an All Might sustaining serious injuries fighting a Sludge Villain and saving people as the entire feed glitched and went fuzzy, the Omnitrix on the other one flashing green lights and wailing an electronic distress wail.
He cut the feed off there.
"Your counterpart abandoned those in need for pursuit of selfish power. A promising if arrogant youth and several heroes, including the one called All Might, died as a result of his actions and inactions."
The Izuku with him looked utterly terrified.
"I'd never...I couldn't imagine..."
"You can't, because you aren't corrupted by a nightmare. The one in my world had. It also gets worse."
He reactivated the clip, this time featuring a human in a puffy primitive space suit confronting the Izuku with his Omnitrix, now in a Tetramand form. In each arm was a bloodied villain of minor repute.
"What do you think you are doing?! Everyone is in an uproar about All Might's death, and you are drawing this much attention to yourself!" The plumber of Earth questioned Izuku, believing him to just be a Tetramand.
"I am doing what I can do now that I have the power and time."
"...You are going to create a scene! The last thing the world needs right now are alien vigilantes with everyone going nuts. You need to go and..."
"And what?! Give up my powers!? Am I not allowed to have powers because I wasn't born with them!? Because I wasn't lucky like Bakugo and All Might and all of the rest of them!? I made my own luck, fixed the universe, and now I'm the bad guy?! Ha! Thirteen I read all about you, and I can beat you and you'll never take away my powers. NO ONE WILL!"
At that shout he transformed from a Tetramand to a Pyronite and blasted the hero point blank with a massive fire attack. The Izuku with him looked on with horror.
"How...that..."
"The Izuku Midoriya of my universe went completely out of control. He's taken over the world and slaughtered all who try to stop him. Heroes, Villains, Aliens, he's killed them all. He even managed to kill Vilgax, though that was a close battle. I cannot believe I was rooting for Vilgax there." He muttered the last part to himself, though the human still heard what he said.
"Whose Vilgax?"
He didn't answer that question.
"He used his Galvan form to unlock Master Control, a feature that enables the Omnitrix to access all transformations without a time limit and allowing transformation between forms without delay. With the energy core my device possesses it will never run out of power and automatically revert him unless he actively uses features he'd never used in his corrupt state! He turned the greatest tool for peace and understanding, a device meant to revive species and allow all to experience another's life perfectly, into a device for conquest and oppression! His corruption had warped my device beyond remote deactivation and removal, and the only way it is going to be removed is by direct force. That is why I need you Izuku Midoriya, one uncorrupted but using an Omnitrix another version of myself created, to take it from him! You must defeat your nightmare counterpart and end the misery of this universe!"
The boy looked uncertain and afraid of the task at hand, but he was not without courage. He quickly nodded.
"I'll...I'll do what I can. With that power he has I'd have to be ready for him. My strongest alien is one I call Shadowrise, who was the 59th alien I unlocked. He's the only one who might...can...will defeat the evil me, but he needs the right conditions to be that strong and beat him in ten minutes before I time out. Do you know when they'll be a new moon, or perhaps a way to lure him away from any sunlight..."
"Access Master Control."
He interrupted the boy before he could start spewing words at him like a Sphoeroid spewing slime, causing the Omnitrix's dial on the boy's wrist to rise up and blind him with green light as the device lit up with a flash of green light blinding the boy.
"Master Control Unlocked via Voice Command of Creator. Technically Alternate Creator, but I'll let it go." the Omnitirx declared as Izuku stared at his watch in amazement.
"I can turn into anything!? How...how many aliens can I become?!"
"One million seven hundred thousand three-hundred and seventeen genetic samples available."
That was hundreds of thousands more than he had recorded on Primus. Perhaps there was more different between their worlds than just a lack of a nightmare at its rotting core. Had his counterpart begun to sample the Andromeda Galaxy along with others beyond?
"You have voice command, mental transformation, manual if you want to make a show of it, and the genetic potential of seemingly multiple galaxies. You are my universe's only hope to end the nightmare it exists in once and for all."
The Izuku from another timeline nodded firmly.
"I won't let anyone down."
With that he activated a teleporter and sent the boy to the Earth.
...
Izuku though he'd have to go a while to find his counterpart. Perhaps drawing attention to himself with shouting or fire works or something. Azmuth had apparently thought of that, and he landed right in front of his counterpart's throne.
He was lounging on it, taking the form of Four Arms and looking at him in shock and disdain. His throne was decorated with trophies of those his alternate self has presumably killed: Endeavor's metal gauntlets, Wash's washing machine outfit, Yoroi Musha's armor, Edgeshot's mask, four pairs of Wild Wild Pussycay cat-ear pieces, Present Mic's speaker, and Eraserhead's goggles. Tattered remains of hero outfits like that of Crust, Mirko, Fat Gum, and Best Jeanist flapped around his throne on poles like they were flags. He could also see gear that looked villainous among the trophies as well: a black skull-like gas mask, a display of severed hands, a suit of armor that looked fit for a Hulk, a magenta plague mask with metal decorations, a pair of spiked shoes, and a cane.
"What sort of sick joke is this!?" The evil him rose from his throne before being blinded by a green light shortly before a pair of green crystalline fists shot out of the ground and bound the other him in two massive grips, one for each pair of limbs. The other him struggled against the crystals as he rose his palms from the ground, now in his first form he had ever become: Diamondhead.
"I wish I had a loudspeaker to tell the world this, but I'll guess you'll have to do. The world has no more need to fear, because I am here!"
His use of All Might's catch phrase, which he did have permission to say as the newest member of his own All Might's informal organization to fight All for One, infuriated the bound Four Arms.
"This is a sick joke. Some other me imitating that false hero. I don't know what you are supposed to be, but I know what you are going to when I'm done with you. Dead."
With that the evil him flashed green with his own form change, though not to one he recognized. It was some sort of green pufferfish/lamprey/thing whose arms were freed from his bind by the mere change in size. The round creature's form inflated before firing a fire horse of slime at him.
He blocked it with a crystal wall he rose from the ground, slime blasting off in millions of drips in all directions. A new green flash showed another form change was at hand, and he rolled out of the way of a fiery fire blast from his counterpart's Heatblast, who engulfed the entire area he had been in a vortex of fire. With his roll finished he transformed into a new alien.
"HUMUNGOSAUR!" He shouted before slamming his now mighty reptilian hands together, creating a shock wave that snuffed out the fire and blew a few trophies and crystal tips away. His evil self was knocked around a bit, but Heatblast could take a beating. Indeed the fire alien got up and glared at him.
"Shouting your forms' names out, for what? Are you trying 'to give people hope' or something? No one would dare be near me without my express demand for it! They know their place, the very same place they put me!"
Like what, Aldera? 'His place' was hardly anything that bad.
"It's just part of why a hero shouts their attacks, announces their presence, or declares their form's name when they say it. I couldn't really fit it in with Diamondhead, but it doesn't just inspire others and give people hope. It also strikes fear into the hearts of villains. When All Might declares he is here, he gives hope and dread to those who deserve either."
"And what, you want to be All Might? How naive. He's no one to inspire to be, especially when you are stronger than him. Speaking of which..."
Heatblast transformed, this time into his own Humungosaur. However they were dressed differently: his form adapted the shirt he was wearing when he transformed (a 'shirt' shirt) into his uniform, as had been the case with Diamondhead, while his other self's form wore black briefs the same color as his Four Arms and tentacle electric guy wore with a green slash or something across his chest the same color as the green the evil Four Arms, Grey Matter, and the other guy had.
"Let me show you that I am the strongest!"
Both their large reptilian forms charged the other, each of their steps shaking the ground around them. Their fists clashed in a clash of pure strength, and he was stunned to find himself flying back from the clash, clearly out-powered by his other self.
"That Vaxasaurian form has been altered! It is beyond the maximum potential of strength for its species!" his Omnitrix warned him.
So don't try to match alien for alien? Got it.
"I've taken my power beyond what it was originally limited to. Because I am better than everyone, just no one ever cared because I didn't have a quirk! No one will ever stop me ever again!"
To prove that point his counterpart returned to Heatblast and fired a blast of fire at him. He quickly changed his form from his 34th alien to his 51st, who took the fire attack like it was nothing and landed on the ground like a block of lead with legs. Which was pretty accurate.
"NRG!"
He shot rays of pure heat from inside the metal casings of NRG at his counterpart, who avoided it with a flash of green light to become Grey Matter. Dropping right under the blasts he morphed into the black and yellow striped Lodestar, the magnetic alien.
His evil self pointed his claws at him with magnetic forces engaged, lifting him from the ground. He fired a blast from his prone position, but the evil Lodestar just hovered to the side to dodge before squeezing him with magnetism. The metal of NRG's suit began to creak with the force applied.
"You can't beat me. I have every power you do, and each of those powers is stronger than your version.I studied them all and know every power they possess inside and out. Just give up and accept your defeat so I can rebuild my throne and clean up my collection."
"Your collection? All Might figures are a collection, those are just morbid trophies. Fallen heroes deserve better than being treated like hunting trophies, even villains deserve better than that." he declared in the Russian accented voice of NRG.
In a flash he turned into alien 52, and to his satisfaction the evil him seemed surprised. He didn't seem to know this form, and he was even more surprised when a rubbery limb flew from his no-longer magnetic form and punched him in the head. Lodestar's head, being magnetic and suspended without a neck, was yanked from Lodestar in that punch, and pulled back to look the severed head right in the face as the body of Lodestar fell inertly.
"Gem Gem!" He didn't need to shout the form's name in front of the severed but still alive head of his evil counterpart, but the guy was horrible so he did anyway. Spinning his other limb around in a great loop to point at the wicked head.
"Oh, what was dat about knowin' every alien I have, or what? Yuh doan recognize little old Gem Gem here, or what? Well ain't dat a shame. Yuh with me? Just as much as murderin' your way across de planet! Okay?" Some aliens gave him different accents, and a few affected his personality a bit. Gem Gem made him a bit more excitable and goofy, and sounded like a 20th century New Yorker. But Gem Gem was also a very versatile and powerful form, so it wasn't one that was really a crippling weakness, or even a weakness at all, compared to some of his other aliens.
"...One alien. One alien doesn't mean anything. That's not going to change anything. I am going to kill you and take that watch! Some All Might worshiping fanboy doesn't deserve it!"
"Yuh sound like Bakugo when yuh yell about killin' someone, yuh know dat right, or what?" He snarked as, amazingly, the other him got even angrier.
"I am nothing like Bakugo!"
To prove how much he wasn't anything like Bakugo he blew up into green light and his inert body became Heatblast, who unleashed a fiery explosion at him that leveled everything in its path. He hopped out of the way of the attack with his elastic and rubbery body, coiling his arms up for an attack of his own.
"Yeah, Bakugo nevuh explodes in a furious rant about stuff dat pisses him off befawh blowin' somethin' up in a massive explosion. Okay? Totally not like Bakugo at all. Okay? Gem Gem Gattling!"
After one more snarky comment he unleashed the barrage of punches right out of a classic story into the evil Heablast, smacking him with dozens of rubbery blows. The fire user hit the ground in a pile of struck rocks and flames, before changing into a pile of acidic goop in the form of Goop. The last few punches struck the gelatinous form and hissed with the stinging acid that Goop was made of.
"Ow!"
Landing on a desolate building he shook the Goop acid off his gloved hands as Goop himself spun up, directed by the anti-gravity projection device that guided Goop's movements back into an upright stance. Goop glared before flashing green and vanishing in a puff of smoke.
"XLR8!?"
An alien briefly appeared right in front of him: he could only see the blue cat-like alien for a moment before the alien was moving too fast again and he was pummeled with tons of punches.
"Try a bit slower for stronger!" and indeed the punches did hurt more than he felt like XLR8's punches did. Each slamming him into the roof of the old building and cracking it just slightly more. By the time the roof cracked fully they had each transformed into a new alien. The evil him had turned into Stinkfly and swung at him with his large tail as he fell.
"Spidermonkey!"
He meanwhile turned into the titular alien primate, alien 17, and shot a blast of web from his tail to entangle Stinkfly. He landed on the edge of a decaying pillar with all his limbs sticking to it like a spider could, while his evil self had quickly changed forms into a blue moth person that phased through the webs like he was Mirio, but leaving ice on the webbing as it fell away harmlessly.
"Neither of us is going to run out of energy, this battle will be decided when one of us kills the other. And you are too weak to kill, you are naive like the rest of the heroes were to what the worlds needed. I am not naive, I changed the world, and removed those who would stop me."
The moth guy flew at him intangible, but he was still visible enough for him to hop out of the way of and land on a different crumbling pillar.
"Oh ohh!" Spidermonkey was another personality tweaker, a lot like Gem Gem actually without an accent. Just monkey noises. "You didn't fix anything. You just broke society."
He hopped out of the way of the moth guy rising out from the pillar, ice in his wake covering the pillar in a slippery barrier.
"Society was already broken. Heroes only cared for publicity, they never served areas without the highlights! If it wasn't where the people were there weren't any to save anyone!"
He was now clinging to the ceiling and looking down at his evil self.
"Uh, yeah, the heroes are in the cities because most people are. You need dozens for a small city, you need, like, one for a town ohh ohh!"
He dropped from his height and changed forms again, landing as a new form as the evil him came at him. Blue and rather hippo like, the form's name was simple.
"Hippopotamass!"
He snared the incoming bug with the yellow energy he emitted from his hands, which forced the bug to fall down the building's caved-in cavities.
"What sort of name is Hippopotamass?!" his evil self questioned in a shout as he patted himself on the chest.
"One for a hippo alien who can manipulate mass!"
A green flash from down in the building's ground floor drew his attention to look down where a rocky alien now glared up at him. The alien moved one of his massive arms up, a glow around it, as he felt his own body suddenly float before being shot up into the sky like a rocket.
Another gravity-manipulating alien! And maybe one a 'little' stronger than Hippopotamass.
Before he was too far up in the air he changed into Gem Gem again, the alteration to his mass allowing him to escape the gravity field. His flexible hands morphed into a parachute as he descended from the height he had been sent, and not directly on top of where he had been blasted from. Though he kept an eye out for any sign of his alternate self.
"Gem Gem!" He wondered if anyone could hear him but his evil self. If they did perhaps they just felt a bit of hope. He could only...hope...
He pondered how that actually sounded as he landed on a building antenna that had seen better days, clinging to his as he swung around it eyes peeled for any evil-Izuku sign. The slightest bend of the wind drew his attention, and the sight of something red in a green aura was speeding towards him.
"Holey moley, and not de alien I have dat I'manna use." he declared in the way only Gem Gem could. That unfamiliar form was a fast one. The alien was quickly coming closer, a red manta creature with a yellow membrane allowing for flight.
In a flash he changed his form to match this unknown alien: a robot with dislocated arms linked by sonic waves similar to that contained with the helmet.
"Dissskkkk Joccckkkeyy!" He buzzed out as he vibrated his sonic form in front of the oncoming speeding alien, forming a sonic barrier that knocked the speeding ray off course and down. The evil him quickly got balanced again and blasted a green laser from his eyes, which struck him through the sonic barrier and right on him. The blow knocked him off the roof, but he caught himself by changing from alien 15 to 31, shooting the vine tentacles of the new form to catch himself and swing another vine arm at the flying manta ray ("Wildvine"!). His arm was kicked away, but he still got back up to the roof spiral and tossed a barrage of black explosive seeds at the new alien.
They exploded in a storm that he was sure had struck his evil self, who flew under the attack and blasted at him with more laser blasts. He squirmed and slithered his many root legs out of the way of the attack as his evil counterpart kept his distance from any easy of entangling attack.
"You're trapped like an ape. I'm going to make you fall!" His evil self declared before blasting a tail laser at the roof antenna, burning away at the metal in a hissing boil.
He changed his form, turning into alien 40. Alien 40 was a green humanoid with three eyes, three head tails, and telekinetic powers.
"Mentacle!"
He used that telekinetic power to snare the ray and slam him into a different building. The structure shook from the blow as he floated down to a more stable building a bit away from the one he had slammed his counterpart too. Mentalce's telekinesis extended to himself as well as others.
"Look well, me, you are angry and irresponsible, but you are still me! You've got to stop being an evil tyrant! What would your mom think?!"
Would that work where the punching didn't?
A large blur appeared as his evil self, again as Four Arms, hopped over to him from the building he had flung him into.
"Why should I care what she thinks!? She never supported me, she's no different then Bakugo or All Might! Hell she's worse! She should have made sure I didn't get born quirkless! She should have checked herself!"
His jaw was agape at the...the...THE!
He didn't have a word to say to that response, and his counterpart took the initiative to punch him into a wall. He did open himself up to that, but he needed a punch at All Might levels to snap himself out of it.
He turned into Goop before he hit the wall, so it wasn't as painful as it could have been. He only just reformed before his other self was Lodestar again and yanked the projector into his hands, leaving his body inert. His evil self turned into Four Arms again and crushed the projector.
"If you are me, you have had to have thought about it! That the very reason we are the way we are is because they failed to make sure they weren't carrying a disease. The same stupidity that makes someone bleed to death at paper cuts or born a dwarf made me powerless! Quirkless! Worthless! They failed to be responsible and I had to pay every consequence! I could have been a naive hero if they had just made sure to check themselves!"
If he didn't have master control he might have been in a bad place right now, but he did have it so he reformed from Goop and became Diamondhead, if just by default.
"Okay one, I wasn't born quirkless! I had mine stolen by All for One! Maybe it is different from you, but are you really blaming everything on others? Your mom, my mom, should have raised us the same way. At some point the murderous rampage becomes your own fault, not hers. Not anyone else's. Just yours. No amount of 'irresponsibility' made that happen. Taking over the world isn't a quirkless trait."
Evil him lunged as Four Arms, but he dodged by turning into the blue raptor he named XLR8 and speeding around the muscled alien without one of his four arms landing.
"XLR8 and Swampfire!"
Swampfire, the humanoid plant with a fiery foilage style, appeared behind Four Arms in a green flash just as the alien turned to strike him. From his palms he gassed the four-armed alien with a methane-based sleeping gas. How that worked was something only Momoko understood, he didn't even know the alien generated methane before she had studied it, but the effect was quick as he teetered.
His evil self tried to get out of the effect by turning into Humungosaur and getting refreshed from the sleep gas by the effect, but he kept spraying and the giant dinosaur alien was also teetering. He stepped forward as his counterpart continued to try and escape the effect by stumbling backwards: his own Swampfire, the rocky alien from earlier, Stinkfly. Nothing he could try was shaking the power off, and he was just about to fall.
He won! The world was saved.
A final green flash had his counterpart become an alien with a metallic sheen, mottled green and black color and a single electronic eye. Upgrade, and the gas was completely ineffective. Upgrade was inorganic, and the gas was having no effect on him.
"That was cute, you should try to be more direct." Upgrade beeped in an electronic-filtered version of his own voice, not a different voice like the other aliens. Upgarde's form liquified as he slithered towards his Omnitrix symbol: a win condition if Upgrade connected.
He quickly changed into his own Grey Matter, whose shirt said 'Smart Shirt' when morphed into him over his evil self's jumpsuit, allowing Upgrade to slither right over him. However Upgrade quickly dropped the momentum and covered him in a blanket of technorganic matter.
"This is over!"
His evil self spoke too soon, as a green flash lit up under the techno organic form, followed by sparks of electricity. In a yelp evil upgrade was formed as the electromagnetic blasts he shot out fried the form. Upgrade quickly turned back into the magnet tanking Four Arms as his pale, metal-studded form debuted in the battle with a fist pound: electricity sparking in his fists with the self-fist bump.
"Frankenstrike!"
His evil self looked him over in an unimpressed manner.
"You should know that this form is stronger than that one. I can clobber him."
Four Arms did just that, slamming two fists into his stomach with immense force. However he countered the superior physical force with a electrically-charged kick, shocking his evil self and giving him an opening to launch a barrage of electrified punches into Four Arms.
"Yeah, well strength isn't everything. There is more to this guy than just punching. Tesla Smash!"
With one really electrically-charged punch he slammed Four Arms into a wall, breaking it and sending Four Arms flying away. His evil counterpart was probably not down though, and he was ready to take whatever new counter-attack he tried.
"Smash!? You want a 'Smash'!? Reality Smash!"
Reality looked like a sonic clap that slammed him into the opposite wall he had stuck. Not enough to break it, but it was enough to hurt. A green flash had Lodestar emerge next, magnetic force already grabbing him by his metallic coils and boots.
"You want to be All Might!? Well be like All Might, be a fake, and die!"
He was promptly shot down back down to the street by Lodestar like a meteor, crashing into the city below and sending up a mushroom cloud of dust and debris.
It took him a moment to shake the blow off, to realize just how deep the hole he had been smacked in. In a flash he turned into Gem Gem (Gem Gem!) and shot his arms up, rocketing himself out of the hole and back onto the surface. Where he promptly realized he was surrounded.
What he was surrounded by he wasn't quite sure: some sort of white alien with a large mouth and what looked like headphones attached to his face. There were dozens of him, suggesting something like Ditto.
"Die." They all declared at once before opening their mouths and letting out a visible sonic blast at him that tore the ground up as it came his way.
"Dissskkkk Joccckkkeyy!" He changed to his sound manipulating form to deflect the sonic waves before they could hit him. The duplicates approaches him, trying to blast sound at him harder, but it wasn't doing anything. They were getting closer though, so he could try to use a different alien and strike them. They just had to let off the sonic attack.
"Just to let you know." one of the duplicates declared in a brief sonic breather before resuming the sonic wail.
"I didn't have that 'Gem Gem' of yours before today." said a second as soon as the first one finished speaking.
"But seeing as you were showing it off, my watch scanned it." said a third, and in a green flash he was staring down a duplicate of Gem Gem, but with the heart-shaped gem that was the center of the form flipped upside down.
"Smash!" Evil Gem Gem said mockingly as both elastic fists swung into him like sledgehammers and struck, leaving him to stumble dizzily as the evil gem form followed him, swinging into him with heavy-hitting elastic fists each time.
"You know I probably scanned that one too." Bash!
"So at leastcha gave me two new fawhms I can use ." Crash!
"Maybe I should keep yuh alive just long tuh see how many mawh yuh can give me." Bash!
Gem Gem swung a fourth time, but in a green flash he became his own Four Arms. 'Muscle Shirt' wasn't quite the coolest his Four Arms could look, his school uniform look was rather 'dope' as Kaoru had called it, as it looked like a classic delinquent protagonist when his school clothes were modified for battle by the Omnitirx, but he was done with being hit and could care less about the exact looks right now. He just wanted to stop the pounding.
Evil Gem Gem swung his feet at him, but with his two lower arms he caught the limbs. He promptly beat the evil gem into the ground like a dusty rug.
Slam!
Slam!
Slam!
"You keep complaining that no one helped you and that no one did anything but hurt you! You are being rather stupid about it too: blaming Mom of all people!? I got the Omnitrix when I was younger than you, yeah that's its name by the way. I was 10! Do you know what I did with it!?"
Slam!
"I figured out how it works, I saved people! I was kind of sort of breaking the law, but when I heard someone screaming I had to do something! You know what that led me to? I got to meet people who'd help me be a hero for real, no rule breaking, a real chance of getting into U.A, all while fighting the most evil villain ever who the Omnitrix is perfect to counter. His name is All for One. The names of those who helped me, are helping me, and are the best sisters I could ever hope to find are Momoko, Miyako, and Kaoru Yagi!"
Evil Gem Gem changed before the next slam into the moth ghost and phased away. The moment he heard him come back up he turned into Frankenstrike and electrocuted the guy, holding him in place with electricity and continuing.
"Yeah my family's kind of messed up. My father is actually All for One, as are the Yagi sisters. They were adopted by a man who in this timeline you killed! You might know him as All Might, and I'm guessing things are a bit different here than in my reality if they haven't put you in your place for your horrible attitude! Yeah, I'm the son of the most evil villain in Japan, and am I taking over the world because I had my powers stolen? NO! I never wanted that! No one should ever want that! Who's your father evil me!? Because I'm sure if it was actually All for One you'd have complained about that already!"
"...some space cop who had better things to do than care for his 'faulty' son.' Though in all honesty...' The bug form growled through the electric pain before turning into another alien he didn't recognize: a tall lanky figure with sharp antenna and talons whose sickly green skin held large bug-like eyes. The form tried to stab him with those sharp antenna and talons, but he turned to NRG and the attacks were harmlessly deflected. The metallic suit he was wearing sprung open to reveal large, metallic spider-legs that began to stab at NRG harmlessly, joining in the frenzy of sparks and scratches.
"...Shut up! Shut up! Shut up! I don't care about YOUR backstory! I only care about mine, and EXTERMINATING those who were my enemies! I killed them all unless some sludge monster killed them first! I got this power because I deserved it most! I didn't have powers and now I do, and all the powers at that! All the powers in the UNIVERSE! What, was this supposed to go someone who already has powers!? How stoopid would that be!? In fact I am thinking that only I deserve powers among this entire stinkin' world! I'm smarter and betterer than everyone else and I can make that happen, once I rip you apart!" The alien seemed to be a personality altering form, who shouted all his words like a crazed maniac.
"Well, good luck with that." he blasted the maniac form with an energy laser and blew him away. He was ready to follow that up with another blast, or perhaps a good punch, when a green flash heralded a new form, and a pair of large black tentacles shot forward. Each with plugs on their end.
They latched onto his chest, and started sparking as they began sucking him dry. He screamed in pain as the dust cleared and the alien his evil self turned into first was here, and the tentacles attacking him were the ones on his head.
"I'm draining you into a husk!"
"Omnitrix power reserves draining rapidly! Reverse course or the Omnitrix will depower!" 'and you will die' he mentally added on to the warning his Omnitrix beeped. He needed something!
In a panic he turned into the first alien he could think of: a humanoid alien like Gem Gem, but a bit more human at first glance despite the skin tone. The main initial difference was a pair of watery wings that came out of his back in the form, and he had to act quickly.
"Water Wings!"
"Oh, a new form. Thank you." His evil form thanked, but he didn't see what this form was doing. Water Wings had a few tricks, and that included Hydrokinesis. And water was everywhere. Every water droplet in range was pulled around the both of them. Water and energy, especially electrically charged stuff, didn't go well.
ZAP!
Both Water Wings and the 'Plugman' form, whatever it was called, screamed from the electrocution both of them were struck with, and it was enough of a shock for him to be released from the plugs and to fly off.
...
Not far of course, just far enough to catch his breath for a minute and get some charge back into the Omnitrix.
"Omnitrix power reserves at sixty-four percent. Given how low it was when you managed your escape, you won't escape it a second time." the Omnitrix beeped from the Omnitrix symbol, which was on the back of the form and merged with the gem the same it was with Gem Gem.
Aliens like that, such as Gem Gem, Water Wings and Projectionist, were all from the same plane and had a similar biology. The gem was the source of everything for them.
"...I need a new strategy." He said aloud. Just hitting the guy hard wasn't enough, and he was able to stop his attempts to knock him out with sleeping gas or speak to his humanity or shared love of their mother.
He wasn't going to try to kill his evil self, no matter how much he deserved it. He didn't kill, heroes should never kill except in the worst scenarios. It was hard to really kill someone with the watch anyway, as he was pretty sure the Omnitrix had a fail safe or something.
There had to be an answer that wasn't death, and one that his counterpart couldn't figure out at a glance. Maybe an alien he had that his evil self didn't. Though that would only work if he could hit the guy so fast he couldn't copy them like he had with Gem Gem, Disk Jockey, and now probably Water Wings.
"Can you display what aliens you have that he doesn't?" He asked his Omnitrix, which beeped a request to change form first for better displaying. He did, turning into Diamondhead out of reflex as his chest Omnitrix badge projected out several holograms.
Some of them he already knew and recognized: the slender form of Projectionist, the large and lobster-skinned termite Aquamite, and Holey Moley, who would not only, well, only be good for killing his evil counterpart but wouldn't even do it fast enough to consider even if he wanted to.
Others he didn't have a name for: an upright rabbit with oddly bent legs, a radish looking alien, and a tailed human-like alien who looked tempting for a reason he couldn't quite put a finger on. He wanted to turn into him, but if he did he was sure it would just make things even more dangerous than they already were when his evil self got the form too.
He kept looking through them when he saw something. His eyes widened as he hoped in joy.
"Yeah, I see something! That'll work!"
"No it won't!"
His holograms of forms only he had vanished as the manta ray flier returned, blasting him with green lasers. He deflected them with one of his crystal arms and fired a barrage of crystal shards at the approaching enemy. His evil self avoided them before changing again, this time into a shaggy werewolf creature whose jaw split open and unleashed a sonic howl at him. Evil him knew Diamondhead's weakness to sonics, and he himself knew to avoid that weakness by springing off the roof with crystal projections from his feet rocketing him off into the air, where he turned back into Water Wings, spinning around to face the wolf and forming two water fists around the howling alien and smacked him with both at once.
"Huron Smash!"
A green flash preceded a sheer physical blow that broke the fists apart as a new alien form, a humanoid squid with green skin, shattered the water attacks and extended unfurling tentacle arms at him.
He avoided them with a dodge and flew away, the tentacle arms allowing his evil self to follow him via swinging. Mid-lunge the squid turned back into the manta ray and he quickly cut the distance between the two of them into a fraction, and one that was constantly shrinking at that. He avoided a few laser blasts before turning into NRG and falling down to the ground as fast as the lead-suited alien could. Before he hit the ground he changed again into XLR8 and sped off.
As he sped around a corner the speedy ray descended in front of him and changed, once more, into the plug alien, but he backtracked and sped backwards away before the plug tentacles could get him.
"You are only delaying the inevitable! You can't beat me while I can beat you or kill you! I'll probably do both!" the plug-formed evil him declared before turning into his own XLR8 and pursuing him. He let him pursue him for a while before wheeling back and turning, in a green flash, into the round and hard ball form of Cannonbolt. The speed XLR8 provided made him fly at extreme force and the evil him had to turn into the bug guy with the intangibility to avoid him, and what ice he got from passing through him quickly broke or melted off. He unfurled as he came out onto an open street and turned into Diamondhead and slammed his fist into the ground and grew crystal spikes everywhere in the open ruins.
"That won't hurt me, no matter how many you make."
He avoided the rising ghost bug's sneak attack by a hair and, hopping a distance away, grinned.
That wasn't the plan, he just needed a good demonstration of how good the next alien was.
In a flash he turned into his second most powerful alien in a 'perfect' fight after Shadowrise: a metallic alien with gray and beige armor and limbs. Gangly, the alien had a pair of 'ports' in his chest that revealed bubbling magma inside him.
"Alien 26: Magmazinger!" he declared in a robotic voice.
"Fire against ice? Cliche much." the moth declared before blowing ice at him. With a hiss of the intense heat inside his second-mother powerful alien, in theory, he melted the ice before it hit before spitting out magma.
The stunned ghost turned into Heatlbast mid-air to not be burned by the heat, and the sheer power of the spit was still enough to require re-directing fire blasting from his arms. He flew towards him, determination burning in his fiery pupils before changing into Lodestar and using magnetic force against him.
"ERGHHHH!"
Lodestar visibly struggled, even as the lava he had spewed began melting away Diamondhead's crystals. A demonstration he was sure his evil self was taking notice of even as he struggled to lift him.
"1,000 tons." He helpfully provided to the struggling magnetic before shooting more magma at him. It coated the magnetic user, green light breaking through seconds later as his evil self changed from Lodestar to Four Arms and leaped at him to start punching.
CLANG!
CLANG!
CLANG!
To little avail.
"...The hell are you made of?!" Four Arms wasn't making any headway punching him and now it was his turn. He swung one of his cumbersome fists at him, which Four Arms dodged. Steam came out of his top in a whistle.
He swung again, this time faster. Four Arms only barely dodged it. The steam out of the top of his head now an even louder kettle shriek.
Third time's the charm and his fist landed, striking Four Arms and sending him flying away.
"Ha ha!" he laughed as the distant flash of green heralded the speeding arrival of evil XLR8, who quickly borrowed his strategy and changed into evil Cannonbolt seconds before impact.
The steam was now even louder, the power in this form boiling like the mantle of the earth itself.
"Clang!"
He matched the sheer force of XLR8-Cannonbolt with a hammer-like swing of his arms, knocking Cannonbolt open. His evil self flashed, glaring the entire time, and into the plug guy.
"DIE!"
He blew boiling steam out of his mouth, burning the swinging plugs and all of his plug-fingers before they could and burning him, causing the dangerous plug alien to scream from the scalding barrier. He turned into the moth guy and vanished into the ground.
He looked around for where he'd appear next, and when he came from behind he blew magma at him again. The attack was dodged as the moth got into the air, who turned into evil Water Wings. Glaring down as the evil gem continued to get altitude, the corrupted him formed a giant mass of water over him.
"Huron Smash!" His evil self said mockingly before slamming every droplet in the area on him in a deluge. With a belch of magma their attacks collided, cancelling each other out in a popping rain of igneous rocks he couldn't identify.
"That is not Huron Smash." he corrected his evil counterpart who glared at him. He swung a fist of his in a spin, steam emerging from the rapidly heating arm that was glowing cherry red.
"Mesa Smash!" He demonstrated what an actual smash was as the sheer hot air force of his punch hit evil Water Wings. The gem crashed through an unmelted crystal spike, shattering it and landing on the ground. The sound of a cracking gem was faintly visible as Water Wings stood up, before a glitchy effect ran through the form.
"Fwifcl?"
His evil self shook his head before turning into the very alien he was after. Evil Magmazinger.
"Was that your best shot? Well you failed, and now your alien is mine as well. Clang!"
Evil Magamzinger was already as charged up as he was, and charged at him with the force of the most powerful of trains. He shattered melting crystal pillars and magma walls and was right on him.
He grinned.
To be safe he first turned into Gem Gem again, who hoped over the charging 'plus-ultra' form. He spun in air briefly with helicopter-like legs, hanging right over the now stalled evil Magmazinger. He shot up a burst of steam at him, but in a burst of green light he turned into an alien, and then into four, who avoided any scalding from the steam.
"Ditto!" Alien 32, a little white and black alien who sounded like a classic cartoon character. Could create duplicates of himself. Savior of the world today.
Evil Magmazinger looked ready to attack, an easy thing really. Ditto was physically weak, possibly as much as he was outside the Omnitrix. Surely he was thinking he just had to choose which Ditto to hit, they were surrounding him and couldn't possibly be a threat.
"Hey if you are done copying me, you want to just admit you don't have an original idea?! I mean taking over the world and killing everyone you don't like, that's so cliche!" One of his duplicates shouted.
Evil Magmazinger winced like he took a planet to the face. His steam fizzled out like it was never there to begin with.
"I mean Bakugo's whole 'I'm going to be the best' crud was kind of unoriginal, but you can't say the same for his drive and moves. All of this was yours, and here you are, stealing all of my tricks. Lammmeee!" Whooped a second Ditto.
"Come on, I'm Izuku Midoriya! Sure I take notes of everything, but I have original ideas. Plenty. Where are your original ideas!?" Mocked the third.
"Or are you so busy being a grumpy pants that you just started to suuucckkkk!"
His evil self was now curled in a ball, shivering as the four Ditto clones of his got closer, and each of them splitting into an additional clone for eight.
Magmazinger was seemingly indestructible. He got stronger and faster as the fight went on. He shot magma and manipulated heat. He was a bit un-nimble, but so were trains. Nothing could stop Magmazinger. Except insults. Magmazinger was physically tougher than Shadowriser, possibly even physically stronger, but one insult and he was gone. He had really thin skin as a seemingly species-wide trait like Gem Gem's excitability. Against someone like Bakugo he'd get more dignity using Molestache than Magmazinger..
"So did you feel like a man killing everyone? You probably used type advantage and didn't fight them mono-e-mono. Because you had no confidence in yourself!"
"What, did All Might answer a question about quirkless heroes by saying it is too dangerous? Well duh it is dangerous! My world had Endeavor die fighting All For One, and you think some quirkless noodle can do better?! All Might just didn't want you to die needlessly!"
"But hey, you didn't even need to ask him if you could be a hero! You proved that you were never good enough to be a hero with everything you did since you got that watch!"
"Izuku Midoriya, you CANNOT be a hero. You were never good enough to be one!"
"What, did you think you could be Batman! Ha, we aren't crazy enough to be Batman! Also we never could get into an exercise routine."
"You and your nerd arms, being a hero? Look I need this watch to do it, but it takes a bit more than a super powerful alien watch to be a hero. And! You! Never! Had! It!"
"Did taking over the world help you get a girlfriend?! Probably NOT!"
"ANGRY KACCHAN NOISES! RAGGGHHH!"
He was now right next to the fetal-position curled evil Magmazinger, each of his eight Ditto selves grinning wickedly before turning into Upgrade himself and slithering right into his Omnitrix.
Green lightning shot out of the Omnitrix, and enough pain seemed to get through the depression that he inflicted on evil him, who changed into the tentacle guy and tried jabbing at his own watch with his tentacles to get him out, too late able to break out of Magmazinger's sensitivity trap.
"NOOOOO!" Evil him shouted as green light and lightning shot out of the Omnitrix before, in a massive green flash, he leapt out of the Omnitrix symbol on plug guy with the Omnitrix in hand. A red flash followed him and as he turned around to see him for the first time in person, stood evil Izuku Midoriya in his own flesh.
He looked just like him, if a bit older and in Aldera clothes just a bit too small for him now. His other self didn't seem to be seeing him, or moving.
He changed forms to Diamondhead, snapping his fingers in front of his evil self. No response.
Catatonic.
He glanced at the Omnitrix in his hand, whose green core was now black, though he had only had a minute to wonder about that before he was teleported away the same as he came.
...
The Splixson transformation was the key to ending the nightmare? He'd not have guessed that. The human had a pretty good plan, after realizing punching himself wasn't a plan. But most species seemed to default to punching first anyway, so it wasn't just a human thing.
The Petrosapien form of the Izuku Midoriya from the true Multiverse handed his suit the deactivated Omnitrix the nightmare had corrupted, a look of tired satisfaction on his crystal face.
"I expected you to fail when the Conductoid got you." He told the boy in his Petrosapien form, who rubbed the back of his head awkwardly.
"I mean it was kind of a close thing, but I stopped him in the end. Wish I could have told everyone the evil guy was gone..."
He waved off the boy's concerns.
"They'll realize they are free of the nightmare of this reality soon enough. Though I do have a few questions before I send you home."
"Oh you want to ask about things? Well I guess I can answer any question you want. I mean if you want to ask about the forms that the me here didn't have I can only give you a few bits and bobs I've heard. Like apparently Gem Gem and Water Wings come from the same world in a dwarf galaxy called Sygar..."
"Not that." He cut off the word attack before it got too much momentum.
"First off you had access to the entire catalog of DNA my alternate self had managed to sample, yet you seem to have only used the forms you knew of. Why was that?"
The human turned Petrosapien shrugged.
"I mean I could have, but I don't really know of them. What they can do, how they do it, the best way to use it. Sure I get a 'how to' instinct guide in my head but that's not like it tells me everything. I am still finding new ways to use some of these guys, and I kept unlocking new ones each month so I am never done learning about them. I just kind of stuck to the tried and true. "
"You did in fact have access to nearly every form the other you used by the other you. You could very well have unlocked them by chance before this moment in time. In fact only one form that your corrupted self used was not in our database, and I scanned it for use. It is now part of playlist seven." The Omnitrix his alternate self made informed the better Izuku Midoriya.
"Really?!" Izuku asked before, in a flash changing into that new form.
"YES! This form is CLEARLY the height of POWER AND TERROR! YES! YES! I SHALL CALL HIM LANK AND I SHALL CRUSH ALL FOR ONE LIKE A CRUSHABLE GRAPE! HA HA HA HA HAH HAH...!" the human, now turned cackling Tallest, laughed loudly and obnoxiously. It was in the DNA to be like over caffeinated Planchaküles after all.
"Relock Master Control."
In a red flash Izuku Midoriya was just a human, a less annoying species than that of 'Lank'.
"Sorry..."
He waved the boy off.
"You just proved your point for not using forms you don't understand in life and death conflict. Though for my second question, why do you name your forms?"
"You mean other than not knowing what their species is called? I mean, they sort of feel like more than just costumes or something. Even when I don't feel like I have a new personality, they feel like their own people. I can't really explain it. Even before I found the Omnitrix I wanted to be someone who can help people, and make them smile and feel safe. Izuku Midoriya is a name, just like Toshinori Yagi. Those names can't make anyone feel like hope has arrived and that they'll be saved. That's what Diamondhead, Gem Gem, Four Arms, and All Might can do."
He really had been robbed by being born into a nightmare.
"Third question, what will you do when this human villain, this 'All for One' is defeated?"
"Save more people knowing that the most dangerous human being on the planet can't hurt anyone. I have powers and I should use them to do good for people."
"I see. Well I thank you for your service Izuku Midoriya. Thanks to you the nightmare we've lived in will soon end. I will return you to your world now."
"Thanks, but now I have to figure out how to tell this story to..."
He was gone in a green flash before he could finish his sentence. With him gone he opened his suit, hoping out of it in his true form and approaching the deactivated Omnitrix.
"The child probably thinks I actually look like that suit." he shook his head at his idle thought before placing his hands on his greatest work, corrupted by the nightmare that was his reality.
His research had revealed that terrible truth: the fact that their entire universe they inhabited was not meant to be. Theirs was an unstable nightmare, created by fears and terrors and given unnatural and cancerous life. The world was created from a nightmare and deteriorated like one, especially when something happened to shake the world.
The nightmare was that of his Omnitrix being used wrong, and now that it was gone the nightmare's end would come to a quicker fruition. Their world would fade away, replaced with a new nightmare most likely. But it would not be drawn out and the corruption would not be widespread. Their universe, one that was not meant to be, would just close its eyes and vanish.
"...Hopefully the versions of me that were meant to be have better luck." he absently told the deactivated Omnitrix, which suddenly reactivated itself in a flash of green. He took a panicked step back as the Omnitrix lunged itself at him, binding itself against his chest and latching itself firmly to his body to him before the dial rose up all on its own.
NO! The nightmare wasn't over!
"I am The Omnitrix! I am the Galaxy, no the Universe! I am no longer just a human, I am EVERYTHING!'' The nightmare Izuku Midoriya's voice came from the corrupted Omnitrix, maniacal and warped, before the dial slammed down and activated itself. And Azmuth knew no more.
END
Form Count
Heroic Izuku Omnitrix forms (CnVerse Academia Izuku, eventual hero name will start with a 'B')
Diamondhead x 5
Humoungosaur
NRG x 2
Gem Gem x 4
Spidermonkey
Hippotomass
Disk Jockey x 2
Wildvine
Mentacle
Goop
XLR8 x 2
Swampfire
Grey Matter
Frankenstrike x 2
Four Arms
Water Wings x 2
Cannonbolt
Magmazinger
Ditto
Upgrade
Lank
Villainous Dark Multiverse Izuku Omnitrix forms (Possibly dubbed 'The Watchman' if 'The Watchmen' is any indication, IDK honestly.)
Feedback x 4
Grey Matter x 2
Four Arms x 6
Heatblast x 4
Spitter
Humoungosaur x 2
Lodestar x 3
Goop
Fasttrack
Stinkfly x 2
Big Chill x 3
Gravattack x 2
Jetray x 3
Swampfire
Upgrade
Echo Echo
Gem Gem
Lank
Blitzwolfer
Gax
XLR8
Cannonbolt
Water Wings
Magmazinger
For the added bits of context I mentioned
Hippopomass is an alien originally mentioned by the writers as an underpowered form Ben unlocked during the Omniverse Flashbacks circa 11 years old of dubious canon status. In recent times an artist from the series gave his own doodles for the appearance of several of them.
Disk Jockey, Mentacle, and Lank originate from Five Years Later, as do the three aliens that cameoed briefly (the rabbit, radish, and tailed humanoid) and details on them can be found on the Five Years Later wiki. Mentalce is the same species as Xylene from the original series while Lank is an Irken. Yes, those Irkens. While in Five Years Later Ben met and scanned Zim in the story this Dark Multiverse is a dark reflection of, Zim exists naturally and is met by Uraraka and Izuku, so the form is naturally present in the Omnitrix. As the heroic Izuku comes from a universe whose title is 'CNVERSE Academia' Irkens don't exist there thus the Omnitrix scanned the form for hero Izuku's use.
Meanwhile from Cnverse Academia Gem Gem and Water Wings are Spinel and Lapis Lazuli transformations from Gem Homeworld, while Magmazinger is a Metalman. You might be more familiar with the named Metalman Auta Magetta. It is "CNverse' after all, and I have plans for the galaxy at large that do involve those guys (more the Gems than the DB types, as the Gems are more directly 'in the path' of the final boss shall we say)
Shadowriser, Aquamite, and Holey Moley are original aliens I hope to commission into reality one day.
Anyway, I hope everyone enjoyed my first foray into the Dekuverse and perhaps I'll come by again.