Izuku's Biomnitrix [ON HOLD]

Team J VS Team D

And the fighting chapter is here!
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    "So, what's the plan?" asked Momo.
"I'll try to locate them using Ditto to spread throughout the whole building, that way we can locate them, the bomb, defend, and attack." replied Izuku.
"Ditto?"
"O-Oh, right, y-you haven't met him yet. He's an alien with the power to split himself into copies that share memories and feelings. So every Ditto knows and feels what the other Ditto knows and feels."
"There is an alien like that?"
"Yes."

"TIME IS UP! THE BOMB HAS BEEN PUT, AND THE HEROES CAN NOW ENTER!"

"It's time. Come forth," he turned the watch on, switched the dial, and pressed, not slammed like a certain brown haired green eyed person from a different show.
"Ditto!"

the alien split into two, then four, then eight, then sixteen.
T

he Dittos spread into 4 groups of four. Four went to look for the bomb. Four to search for Sero and Kirishima. Four to protect Yaoyorozu from the front, and four to protect her from the back.
"Umm...Yaoyorozu, are you alright?" asked Ditto 1, the original.
She just jept staring at Dittos while cupping her mouth, with sparkles in her eyes, before she snapped out of it, and took on a serious persona,
"Yes, Midoriya, I'm fine. Anything about the bomb?"
"Hmm....AHA! They put the bomb on the highest floor. A good tactic, but expected. It's in a room with one small window, and the entrance is blocked off by Sero's tape, who is nowhere seen, and the bomb is being by Kirishima."
"Then Sero might be looking for us. Let's try and keep the element of surprise on our side. Please tell the others to come back without being seen."
Izuku nodded, and they waited. A few seconds later, the eight Dittos came back, before merging back into one Ditto.
"I suppose wecould try to take care of Sero, but his tapes can easily restrict the clones, so the best option is sneaking in unnoticed."
"Is it possible to enter through that window?"
"Too small for any alien I have that can fly, and I can't switch aliens fast enough to transform into one that can fit while hovering..."
Izuku suddenly lifted his head up with a smile.
"I take it you have an idea?"
"...Do you have anything that can shoot something small?"
Momo created a small cannon,
"Is this good enough?"
Izuku grinned.

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Kirishima was guarding the bomb, and focusing on everything he can, as well as trying to figure out what tactics the other team would use.
He certainly didn't expect Yaoyorozu to appear with a small cannon, shooting a cannonball. The ball tore through the tapes, but didn't budge Kirishima's hardened body. The ball fell on the floor, and Yaoyorozu ran away.
"Sero, Yaoyorozu just passed by. They might be planning something, cause I'm sure both of them are smart. I want you to try and cature her while I stay here and protect the bomb."
"Roger!"
What Kirishima didn't notice was the cannonball open up to show a little frog-like grey creature inside.
The creature crawled out, headed to the bomb, and hid behind it, before pressing the omnitrix on his back.
Izuku transformed back, and put his hand on the bomb. Kirishima noticed the bright flash, but it was too late.
"HERO TEAM WINS!"
Izuku went to the still dumbstruck Kirishima, and tied the capture tape that was given to them around his arm.
"KIRISHIMA HAS BEEN CAUGHT!"
"SERO HAS BEEN CAUGHT!"
Looks like Momo captured Sero, too!

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When the quatro came back, Team J was congratulated on their win, but there was one thing,
"SO, WOULD ANYONE LIKE TO EXPLAIN HOW THEY GOT THEIR VICTORY?!"
...
Silence reigned for a while, before Momo spoke up:
"Please let me explain,  after Ditto located the bomb and informed of the enemies' positions, Izuku transformed into a different creature called Grey Matter, that I put inside a hollow cannonball, and shot it to the other side. Grey Matter opened the ball and sneaked to the bomb before transforming back to normal and securing victory."
"WOW! SO THAT'S WHY THE BALL FELT LIGHTER THAN I EXPECTED!" exclaimed Eijirou.
"YAOMOMO! THAT IDEA IS GENIUS! HOW DID YOU COME UP WITH THAT?!" screamed Mina.
"Umm, actually, it was Midoriya's plan."
"Really?!"
The class went from questioning Momo to questioning Midoriya, who tried to answer as much questions as he can, ignoring some which were related to any of the other aliens he hasn't shown yet.
"Hey, what does Grey Matter do?"
asked Ojiro.
All the other questions stopped to listen to Izuku's answer.
"Well, he's very tiny, so he can fit in small spaces for infiltration and stealth missions. Oh, he's also super smart, like...really really smart. He can probably make a jet out of a toaster. And I get the feeling he would know about the omnitrix more than me."
"Why not let him see it?" asked Todoroki.
"Huh?"
"Why not take some photos of the omnitrix from different angles, and try to see if he can find out anything at all. Put a pencil and papers so that he can write the information on it."
"That's actually a....very smart idea. Let's do it now!"
He immediately took out his phone and did as suggested.
When he finished, he transformed into, "Grey Matter!", and got to work, ignoring some of the girls mentioning how cute? he is.
"Well, seems that this is Level 20 Technology. It stores the DNA of a certain species, and allows the user  to transform into said species and aquire its abilities, strengths, and weaknesses. So far, it has 20 races unlocked, and has a safety feature that prevents the user from remaining in alien form for over 10 minutes, but it has been turned off through temporaraly accessing 'Master Control', but nothing else other than that and alien species shifting without manual activation." muttered the small alien.
"Species?" asked Shoji.
Grey Matter nodded, "Every alien has its species, like you, humans, me, a galvan, Ditto, a splixson, and others."
"And how do you know that?" asked Denki.
"The Galvan race is known to be the smartest race in the universes."
"Universes? There's more than one?" asked Mina.
"Yes, there are countless universes. Even different dimensions and timelines."
"Again, how do you know that? You haven't been there, and you're Izuku. Even if this form gives you a lot of knowledge, I'm sure you wouldn't create races for your aliens. So are there really aliens out there?" asked Tokoyami.
"I...I know that they exist. There are many aliens that live on there respective planets. I know this watch is called the omnitrix, and there are DNAs that are already stored inside, just need unlocking through either 'Master Control', time, danger, or scanning."
"Scanning?" asked Momo.
"Yes. If the Omnitrix encounters an alien, it can scan its DNA and register it if it doesn't exist already within the watch, or unlock the DNA if it is already there."
"So that proves that not only are there aliens out there, but you can transform into them too?" asked Tsuyu.
"Yes. Oh? What do we have here? Although the shape looks different, there's a DNA fuser inside the watch, that allows the fusion of two aliens."
"So that's how you were mixing your creatures!" yelled Sero.
"I guess unlocking all aliens would cause a lot of strain on Izuku, and a lot of new aliens to study and learn how to use. I will just unlock one of them every now and then."
"You can do that?" asked Aoyama.
"Of course, I'm a Galvan, remember? Alson it is easier  since it looks like it was designed by one."
"Designed by one? Isn't this Midoriya's quirk?"
"It is. Just that this quirk is based on something that existed previously. I'd say that someone in his family line had the first Omnitrix, and the alien DNAs fused with his DNA, causing the omnitrix to appear as a quirk in one of the user's descendants, which is, in this case, Izuku Midoriya."
"This quirk is getting more complicated and interesting by the day." muttered All Might under his breath. (I'm surprised he can do that in his hero form. I thought all he did was yell...)
"I will leave the steps to unlock the alien on the papers." said the Galvan before he held the pencil that was bigger than him, and wrote the instructions.

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"Done! I should turn back since the time limit was broken 15 minutes ago."

A bright light flashed.

"Okay! Time to work." said a normal Izuku as he took the notes and started fidelling with the watch.

The rest of the battles passed, and Izuku took as much notes as he can while still working on the Omnitrix.

"FINALLY!" yelled Izuku as the Omnitrix lit up and showed silhouettes of different aliens.
"So what now?" asked Uararaka.
"i just choose one... but which one?"

You tell me by commenting!