Disclaimer: I do not own Pokémon. This story, like several others of its kind was inspired by various human Pokémon/pokemorph/gijinka/moemon/whatever you call it pictures floating around in various areas of the internet.

Prologue

The cave had many names. Its name had changed several times as explorers and trainers alike delved deeper and deeper inside, exposing its secrets. However, not all of those secrets had been found. Only Pokémon had ever reached past the first five levels. The problem was; it kept going.

The oldest name had been the Unknown Dungeon. It was a fitting name, that warned the very few that dared enter of the vast number of secrets it held. The more recent name, meant to make the cave seem like something approachable, was the Cerulean Cave, so picked because of the cave's close vicinity to Cerulean City, in the northern Kanto region.

Much time had passed since the first bold trainers entered, to find Pokémon possessing strength beyond their imagining. However, the cave remained a place of limitless possibility. No one knew where it ended. Some even wanted it to go on forever, a bottomless pit of vast potential.

But it did have an end.

On the very bottom level, the Pokémon known as Mewtwo kept himself hidden away from the humans he despised. The humans that had made him into the monster that he was.

Down, in the near total darkness, Mewtwo meditated and honed his psychic abilities until he was certain that he could defeat any Pokémon, or human for that matter, with little more than a thought.

And yet, it still wasn't enough. There was more power that he could obtain, he knew it. He had travelled the world dozens of times over and had been both shocked and exhilarated to find that there was one other that was stronger than he. There was one that some called the God of Pokémon, Arceus.

And now, after years of painstaking study and meditation, Mewtwo was ready.

Seated in the center of a lonely, isolated rock, surrounded by water, in the farthest corner of the Unknown Dungeon, Mewtwo gathered his thoughts and sharpened them, reaching out for the God of Pokémon that had abandoned him.

He reached skyward, probing past the sky and beyond the veil of stars that separated the whole of existence from something more. And in the darkness beyond the stars, Mewtwo found what he was looking for.

At last, Mewtwo directed his thoughts at the entity that watched him. Slowly, Mewtwo opened his eyes, perfectly able to hold the psychic connection in place, without faltering.

The Unknown Dungeon was gone, replaced with a black void that slowly lit up before him. One by one, stars winked into being. Billions upon billions of tiny, insignificant little lights that together formed a single mass.

The whole of the universe seemed miniscule before Mewtwo's gaze. By just barely turning his head, he could see stretched out before him every planet, star, constellation, and galaxy all swirling together in a perfectly tuned harmony, a simple, delicate piece of art crafted by forces unknown to any. And yet, the psychic strand that linked Mewtwo back to his solid location on Earth still burned white-hot, pointing out what was nothing more than a speck that wasn't even visible.

Briefly, Mewtwo held out his white, three-fingered hand and swept over the vision before him, as if to brush the whole of existence away, like so much dust on a table.

Mewtwo, the voice of Arceus did not come from one single location, I knew you'd come one day. The voice was emotionless, flat and uncaring. It reminded Mewtwo of the scientists that ripped him away from his mother.

Tell me, Arceus, Mewtwo sneered, they say you are the God of Pokémon, is there any truth in that claim?

It was not a claim that I made, Mewtwo, Arceus replied without faltering, I have created much, that is true. But I never called myself a God.

And did you create me? Mewtwo asked, already knowing it to be true.

Of course, Arceus answered, your life is just as precious as all others. And I care for your life just as much as any other.

Then you saw what happened to me, Mewtwo snapped back, you knew what was happening and you did nothing!

Mewtwo's rage grew as he considered what was before him. The God of Pokémon that had stood idly by while he suffered at the hands of creatures that were weaker than he. Creatures that abused his brethren, enslaving them and forcing them to fight one another for some pathetic form of imagined glory. How could a being of such power allow something like that?

I did, Arceus's booming voice remained unfeeling, I saw everything, as I see everything happening now. But you do not. Even with the power you possess, you still do not see. You are trapped. And this is where you've come for answers.

The god was playing games, Mewtwo was certain of it. It admitted to seeing what was happening, yes, but it still hid something. More secrets, more riddles, more lies…there would be no end to it.

I didn't come here to beg for answers from you, Mewtwo lashed out, sending waves of psychic energy rippling through the illusion of space-time around him, seeking the God of Pokémon somewhere in that abyss. But he might as well have been striking at smoke.

The answers lie within you, Mewtwo, the voice of Arceus came back, unperturbed by Mewtwo's failed assault, you already possess the answer to every question you could ask. You need only search within yourself. I have faith, in you.

You are weak, Arceus, Mewtwo would get nothing but petty lies and deceit from this creature. So much power was being wasted. Arceus could smite the entirety of humanity and wipe the slate clean and start again. Yet it did nothing and let its fellow Pokémon suffer while the humans ruled. Pathetic. What good was a God that didn't help its creation? Mewtwo had come here for nothing.

Suddenly, the connection broke and Mewtwo's eyes opened back in the bottom level of the Unknown Dungeon, an entire plane of existence away.

He screamed, in anguished rage and began tearing apart the cave itself with his psychic powers. He tore down walls and hurled boulders the size of buildings, without lifting a finger.

Then, at last, Mewtwo saw clearly what he must do. He remembered with perfect clarity what must be the key to his future.

Laughing, Mewtwo burst skyward through the ceiling of the Unknown Dungeon. There was work to do. Once again, he was excited by the thrill of what was coming, and he was ready for it. The game had begun.

AN: thanks for reading the prologue. this obviously isn't the true start to this story, just a little teaser of things to come in the later chapters. if you like it so far, I encourage you to keep going, the next few chapters (most notably chapters 4 and 5) will give a better idea of what the whole story is going to be about

review if you like and I hope you keep reading!