Ultimate Class? You mean Ultimate Lifeform[Highschool DxD/Sonic/Shadow!SI] - 1

xxx

Log Entry 1:

I've been given a new lab by the Government today here at the military base known as Area 51

As for why?

Well, apparently, aliens are real, as a few weeks ago, a spaceship apparently crashed down nearby here in the middle of the Nevada Desert; the U.S. Government wants me and the other scientist here at the facility to investigate and see how it can be used to fight against the Russians in this Cold War that has been raging for almost two decades now.

xxx

Log Entry 4:

A month has passed since I began working with the alien technology and bodies.

These Black Aliens, seems to be unique carbon-passed lifeforms with a cell structure completely different from humans, with said unique biology seemingly being needed for their tech.

And it also seems that all alien carcasses are part of the same species despite their different body structure, especially the carcass with three eyes.

The apparel it was found with seems to indicate that it was perhaps the Captain of the vessel that had crashed.

Hopefully, we can advance our knowledge of computing so that we can decode their advanced bio-tech for human needs.

xxx

Log Entry 120:

Well, after two years, our research has definitely proven fruitful as it allowed the NASA program to be ahead of schedule by several years, beating our Russian rivals to the Moon.

Though on the Moon, our astronauts found a perfectly cut green gemstone on the surface, which was quickly brought to us.

And we quickly found that it was related to the Black Aliens, as bringing it near their ship brought it back online fully.

The energy that this rock exudes is seemingly unlimited, potentially taping into another dimension to draw power, but the energy is also radioactive; it has been sealed properly, but perhaps this emerald is from their homeworld and is responsible for their evolution; their version of plutonium?

It is obviously not the only one of their kind, with it being found on the Moon and the gabbing hole in the side of the ship…

Perhaps it was the power source and also cargo.

Potential colonization ship?

If so and we have not found others in the ship, the rest has scattered across the Earth.

Find a way to analyze and detect the chaotic energy of this…Chaos Emerald.

Yes.

Chaos Emerald is a fitting name.

Perhaps, Linda over in Lab 3 will assist.

xxx

Log Entry 200:

I have children.

Twins.

Ivo and Maria Robotnit.

I never thought I would find a partner, but me and Linda hit it off in a way I never thought possible, a partner I didn't know I needed.

She even managed to crack the language of the Aliens.

Their names translate in a way we can understand to Black Arms, with the leader being Black Doom.

Ominous.

Though speaking of the aliens, their bodies, even after several years, have not degraded or rotted at all.

They are perfectly biological immortal beings, though what could be called a soul has definitely left their bodies.

Xxx

Log Entry 613:

…

Disaster has struck our family.

Maria has been struck by a genetic disease that is now slowly wasting away her body.

The doctors gave her about ten years.

And to make it worse, our lap was shut down.

According to the U.S. Government, our job is done, as there is nothing more to be learned from the Aliens.

Fools, the lot of them, we've barely breached the surface of what we could learn, especially about genetics.

And about Chaos Energy.

I managed to sneak out samples and also the Chaos Scanner.

Xxx

Log Entry 620:

I have found a new backer.

And in doing so, I have learned that here on Earth, there exists a world of Supernatural activity that is hidden from the mundane World.

I have made a deal with the Devil.

May God have mercy on my soul.

Xxx

Log Entry 622:

My new facility has been created.

I will get all the funding I want for a cure for my daughter as long as I make them a weapon that can kill a being that exists above the gods.

I have accepted the deal.

My wife does not know about this, and neither does my son.

I intend to keep it that way.

Xxx

Log Entry 650:

My backer has expected the proposal to create a weapon in the form of an Ultimate Life, a being that could surpass all others, but using the D.N.A. of the Black Arms as the base, fueled by Chaos Energy.

Xxx

Log Entry 867:

Four years have passed since I started working my 'new job.'

My family lives the best life they can, and while the main project hasn't taken off the ground, I have assisted my backer in other projects to give insight into my own.

Though with the collection of a second Chaos Emerald, we now have a source of power to work with, that shall fuel my creation.

Xxx

Log Entry 905:

The D.N.A. of the Black Arms was the right path after all; it is an incredible bonding agent on the genetic level, allowing wildly different D.N.A. structures to work with one another.

Use it to successfully transplant the arm of a Fallen Angel to a Devil without any adverse effects.

With this, I shall create the Ultimate Lifeform of this Planet by combining the D.N.A. of all the races; if they all came from one source, putting the parts together should create a new version of the source.

Project S.H.A.D.O.W. can now commence.

Xxx

Log Entry 910:

Linda is dead.

My wife is gone, I only have my children, and the relationship between the Ivo and I have fractured.

I have sent him to a full-paid boarding school where he can learn as much as possible.

And as for Maria, I have relocated her to my lab for observation as she is getting weaker by the day, with her immune system worsening. So I've had to put her in a sterile room.

My little girl is so smart and understanding.

S.H.A.D.O.W. is coming along nicely; perhaps I will have time yet.

Log Entry 962:

There are two years until the deadline for my dear Maria before she passes away from her disease; at least, that was the original prognosis, but it seems her disease has accelerated.

I have put her in stasis that should by me all the time, I did not want to do it initially as I did not want to rob her of time, but it seems the universe is conspiring against me.

Both a potential cure and S.H.A.D.O.W. are coming along; I just hope I have enough time myself.

We were both old, then we had our children, weren't we, Linda?

A miracle for both of us.

xxx

Log Entry 1111:

S.H.A.D.O.W. or just Shadow, the body has developed in a way I did not expect; I attribute it to the Chaos Emerald and the Chaos Energy; over the years, I have learned that it seems to be somewhat sentient.

Inciting mutations in Shadow, as if they want it to develop a certain way, as the appearance could not have come about from the D.N.A. used to make Shadow outside of their gender.

Shadow was truly the Ultimate Lifeform, made from contradictory beings, a being of chaos.

I wonder if the other Chaos Emeralds that exist on Earth, thanks to the Black Arms' ship crashing, have mutated whoever found them if they have been found.

But that is for later.

I need to present my progress to my backer.

xxx

Log Entry 1112:

This is the final log entry of mine.

Military forces have invaded my lap.

G.U.N. An organization created by the U.N and funded by the US to deal with Supernatural beings in an effort to ensure the supremacy of the human race.

They seek to take what I have created for their own purposes.

But I won't let them.

And it seems my backer has abandoned me as well. Perhaps he feared that my creation would replace him… Pride truly was their sin.

I have adminisated the cure to Maria, it wasn't fully tested, but the simulations looked promising. It was made using Shadow's blood and DNA of Youkai to act as a strengthening agent, as expected, it works as a Panacea. And the effects on her body were instant as the damage that occurred by her disease healed in an instant. Her body grew to what she should be at her physical age, though going further in the sexual maturity department as her breasts enlarged to the size of her head, butt, and hips, following so that she was at the peak fertility. A cat tail alongside a pair of ears emerged from her body as the DNA used had been from a Nekomata. Had not been able to get the more premium Nekoshou DNA.

I knew it would have consequences, but I would rather have her cease to be human than dead.

I have taken Shadow and Maria to the lowest sublevel of the lab alongside the Chaos Emerald there, they will both stay in stasis for the foreseeable future until all have forgotten about them. I have connected them together via a mental simulation so they can learn to love and know each other.

And then they shall emerge, and together they shall take the world as theirs and replace the creatures living upon it with their offspring; the world is theirs to inherit. As thanks to Maria's changes, her body is extremely genetically compatible with Shadow now.

This shall be my vengeance upon this planet who has taken everything from me.

Ivo.

My son.

I hope you live a true and fulfilled life.

I am sorry.

And Maria and Shadow.

My two children.

I love you…

"Computer, seal the lower levels and then initiate self-destruct of upper laboratories levels," Gerald Robotnik spoke as he sat in his chair, blood using from a bullet hole as the sound of soldiers trying to destroy the reinforced doors of the main lab.

"Understood."

Crash! The doors were broken open.

"Gerald Robotnik, you are under arrest for illegal research and theft of US Property and resources. Surrender now, and you will be given medical treatment!" A soldier shouted at him, and he slowly turned around to face them.

"It is Doctor Robotnik, and no, we shall go to hell together." The man said and immediately, the soldiers noticed that countdown that was happening.

"Everyone retreat! Retreat! The place is rigged to blow!"

"A little too late for that. HAHAHAHAH!" Gerald laughed as he he was consumed in an anti-matter explosion.

Xxx

"So that is what happened, Grandfather," Irene Robotnik said as she read over the logs and watched the security footage of his last moments; all the while, her robots were cleaning up the laboratory that had been sealed away for almost fifty years. "Thank you for finding this, Sage."

"You are welcome, Mother," The android, who was the culmination of her genius, replied as she continued the restoration of the Laboratories database. Though from the looks of it, Grandfather had clearly gotten a little insane at the end.

"So that is the so-called Ultimate Lifeform that our Boss wanted your Grandfather to make?" The sensual voice of Kuroka said as her friend stood beside Irene. "Doesn't look like much."

"She was never woken up and deployed," Irene said as she looked at the humanoid being that floated in stasis in the tank before them; their skin was fair, and the body rather voluptuous with large breasts, a big butt, and rather meaty thighs, but rather short in stature.

Irene eyeballed her to be about 150 centimeters or so tall, very short in comparison to her, as Irene stood at 185cm tall with what could be called huge breasts, surpassing even her horny Nekoshou friend in breast size by a cup or two.

Shadow's hair was black as the night with red highlights throughout it, and on top of her head was a pair of animal ears with a small matching tail growing from right above her butt. Making her look like most of the ones dubbed 'Mobians' by the public, especially that blue menace.

Which was kinda funny as she was older than her by a few decades.

But the thing that stood out the most was the bulge that was being made and highlighted by the leotard Shadow was wearing(one of two accessories on her body, the other being a pair of gold rings on her wrists), which explained why Grandfather thought Shadow and Aunty could breed with one another as the Ultimate Lifeform was what could be called a Futanari.

And a very well-endowed one at that, going by how large those testicles were.

Irene could feel her face get a little hot as she looked at her.

And right next to Shadow was Maria Robotnik, her Aunt who had been in stasis for fifty years and so still looked like a young teenage girl, even with a rather impressive set of breasts.

"Well, if she is up to snuff, I wouldn't mind making some Ultimate Nekoshou with her," Kuroka commented. "But shouldn't we hurry and get them out before G.U.N. returns with reinforcement?"

Yeah, that was true, as a G.U.N. base had been constructed on top of her Grandfather's lab to literally bury what had happened. The only reason they hadn't raided the lab was because the place was sealed, and you needed matching DNA to unlock the door.

But their Boss had told them where it was, and so she, Sage, and Kuroka, alongside her Eggbots, had gone and raided the base to gain access to this place.

And obviously G.U.N. was going to respond to that.

"I am ready to bring them out of stasis, Mother," Sage stated as she continued interfacing with the computer network, downloading all of Geralds's research regarding Shadow, Maria's cure, and all he knew about Chaos Energy and Chaos Emeralds, the most enigmatic objects that existed in the word.

Something she and her now later father, the great Ivo Robotnik, known to the world as the Mad Scientist Dr. Eggman.

Her genius and that connection was why Irene had been approached by the Khaos Brigade after his death at the hands of that damnable Hedgehog.

"Do it, Sage," Irene told the silver-haired data android and her self-proclaimed daughter nodded her head as the stasis was disabled on the last bit that remained of her family.

With Shadow's tank emptying of the liquid that she had been grown in.

The tank opened up and out landed the Ultimate Lifeform that her Grandfather had created, born from Chaos Energy, Alien DNA, and DNA from beings on Earth.

She opened her eyes, and Irene could see that they were pure crimson. And a second later, she spoke, and Irene found herself blushing at her rather soothing voice.

"I am Shadow, are you the ones that woke us up?"

Xxx

My mind was a blur of memories as I found myself coming to true consciousness as. I remembered spending a very, very long time in a dream with the person I loved the most, but I also remembered the life of a rather ordinary human male.

I was both of them.

And so I was Shadow the Hedgehog, the Ultimate Life Form created by Gerald Robotnik, and I had spent a long, long time having the best dream with Maria.

"I am Shadow, are you the ones that woke us up?" I asked the three individuals before me, two I recognized but were different from my memories in terms of body shape; floating in the air with long silver hair was a teenage version of Sage from Frontiers, and next to her was a female Dr. Eggman with huge voluptuous breasts that were barely contained by the red jacket, the flesh almost flowing out. She also has meaty thighs and a dangerously short skirt.

And on the other side stood a black-haired cat girl wearing a kimono; her appearance was familiar, but I couldn't place it.

"I am Irene Robotnik, Gerald's granddaughter," The busty ginger answered. And I guess that was the relation in this world. "Do you know who that is?"

"I do; he was the one that created me, I… we were in a simulation, a dream, and his Digital Ghost explained things to us," I answered as I kept my focus on the black-haired catgirl.

"Sage, can you preserve the simulation data?" Irene asked the thicked, thighed teen.

"I shall try Mother," She answered as her red arms sunk into the computer terminal that was in the center of what was obviously Gerald's lab.

"And?"

"That is Sage, my most complex creation so far," She answered, and that meant this Sage had been made by Irene instead of found like in the main universe. "And this is my friend Kuroka."

That was a name I knew, and it explained why she looked familiar to me… So that meant this was DxD… DxD with Sonic…

Well, that explained why I looked like this.. fat tits, ass, and also male genitalia.

"Hello," Nekoshou greeted me with a sultry smile, the horny Youkai's eyes firmly locked on my crotch.

"Greetings," I simply replied; I was Shadow the fucking Hedgehog, even if I was a lot more human-looking and futanized. I had an image that needed to be established asap.

"S-Shadow," I heard a familiar voice speak, but her voice was dry.

"Maria," I said in concern as I quickly went to the blond shortstack catgirl who was currently sitting up looking very confused and dazed as she was still recovering from the simulation ending. "How are you feeling."

"Shadow… are we out now? Are we in the real world now?" She asked.

"That you are," I heard Irene say and Maria looked over at her, her face becoming one of shock.

"M-mom?" she asked.

"No, I am not you, Mother," Irene answered. "I do know I look a lot like Grandmother Linda from pictires and what Father used to so say."

"Grandmother?" Maria asked in confusion.

"Yeah, I am Irene Robotnik, Ivo, your twin brother, is my father." She answered.

"Your… my Niece then?" She asked, and Irene nodded. "How long… how long were you in that dream, Shadow?"

"For about fifty years," Kuroka answered. "Hey there, cutie, my name is Kuroka. I am Irene's friend and partner in various crimes, and aren't you an adorable little Nekomata."

Maria blushed a little at the praise. "That was that version of father said I had become thanks to the cure he used on me."

"Well, once we get you out of her, Big Sis, Kuroka here is going to teach you all about that cat life, which is certain to get Shirone jealous, hehehehe," Kuroka laughed in a fake evil laugh that just made my eyes roll.

"Irene, has it really been fifty years?" Maria asked, handling the overload of information a lot better than I thought she would.

"Yes," She answered. "You two have been in this place for fifty years due to the actions of GUN."

"They… they are the ones that killed Father, aren't they?" Maria asked, a look of sadness on her face as she recalled what the AI recreation of the Professor had told us.

"They are, and they built a base on top of it to keep you buried and forgotten," Irene stated.

"And then we broke in to get you out once we were told you were still down here," Kuroka added. "Which means we need to leave soon before we get overwhelmed by reinforcements, as you lost over half of your bots from getting in."

"I will be able to handle it," I answered as I stood up. "But first, some proper clothes would be appreciated."

At that, Maria actually got a good look at me, and she blushed at the sight of my bulge.

"Yes, clothes would probably be a good idea," Maria said. "Need something that… fits these things." Maria blushed even harder as she pointed at her gown-covered breasts.

"There are clothes for the both of you sealed in a box; it seems the professor was prepared for the day you would wake up," Sage answered.

"Shouldn't that be all rotted away?" Maria asked.

"It looks to be vacuum sealed, no contaminants, and fully sterilized," Sage answered.

"Grandfather was truly looking ahead," Irene said as she as found the clothes and handed them to us.

Maria's clothes were a blue dress that definitely looked like it had gone out of style fifty years ago, but she just smiled as she put it on though; it was definitely a little tight around her now expanded breast as it was clear they had been made before the cure had been administered.

Whereas my outfit was a bit more modern looking, with black pants that had red highlights and a black jacket that showed of leotard-covered midriff.

And then there was the equipment part of my outfit, specially my gloves and my shoes.

Tools that the Professor had designed to help me harness my Chaos Energy, having practiced with replicas during the dream/simulation.

The gloves allowed me to gather Chaos Energy in my hands, allowing me to form constructs and fire blasts made from it and utilize even better acts of superstrength,

And then there were my Air Shoes, as they were called, which allowed me to eject Chaos Energy from my feet to move at super speed.

"Well, somebody is dripped out," Kuroka stated as she gave me a smile. "Though we are definitely getting you some much more modern clothing, you are looking like a copy of Disney's Alice with that blue dress of yours."

"It is a version of my favorite dress I got then I was ten," Maria retorted.

Kuroka had the decency to look a little bit ashamed at that.

"Well, it's time for us to get moving; G.U.N. has gathered outside and is going to move in soon," Irene said as she pressed a finger to her glasses?

Ah she had a pair of smart glasses, probably connected to the security or a drone that was hovering outside.

"And we need to leave before I can teleport us out," Kuroka said with a sigh.

"You can teleport?" Maria asked in surprise.

"Most people can with a proper magic circle," Kuroka answered. "… and this place is covered in anti-teleportation barriers… most places like this are, and that stuff goes out to about a mile in each direction."

"And like I said, I shall clear the way," I said, but there was also one thing that needed to be brought along; of course, I reached out with a hand and with but a thought, the yellow Chaos Emerald that acted as the lab's power source, flew directly into my and was quickly 'absorbed' by my body. "Let's go."

"Well, never seen anything like that before," Irene simply said as we ran out, Irene in her little machine with Maria, while Kuroka ran next to and it did not take long for us to get up top.

And there, standing in the middle of a military base, we were surrounded by men with guns and large machines that were hovering in the air.

"Irene Robotnik and Kuroka the Black Cat, you are under arrest for illegally entering a G.U.N. Base, destruction of G.U.N. property, harming G.U.N personnel, and theft of G.U.N resources. Surrender peacefully, and you will be given a fair trial. and if not, we are allowed to use lethal force!" A voice echoed from the largest of aircraft. "You have thirty seconds to comply, or we will open fire."

"Well, Ms. Ultimate Lifeform, do you think you can handle a platoon of soldiers and highly advanced military hardware?" Kuroka asked me, a cheeky grin on her face.

"I will be done in less than five seconds," I answered as I drew on the power of the Chaos Emerald that existed now within my soul; it would be taxing, but I would be so worth it.

And so I spoke two words that, along with two others, would be feared by many in the future.

"Chaos… CONTROL!"

And then time was trapped in a bottle.