So this is not the first thing I've written, or the first thing I've published. But this is my first fanfic for ffnet. I adopted the story for Vaeru, who put a prologue of an x-men/yyh fic up. You can find it here: www . fanfiction . net / s / 5884506 / 1 / For_Adoption_YYH_XMen_Crossover just take out the spaces. I have an idea of where I'm going with this, but it may turn out completely different, all depending on where the story takes me.

Disclaimer: I don't own Yu Yu Hakusho or X-Men. Original idea belongs to Vaeru.

Also, there are acknowledged relationships in this, but that doesn't make it a romance! I won't be focusing on the relationships unless it plays a part in the plot.

This takes place after Yu Yu Hakusho has ended, and just after Spike has left to live with the Morlocks after mutants are outed in X-Men Evolution (episode 36, season 3)

Mission: Mutant

Prologue

"Lord Koenma!" A large blue ogre burst into the godling's office, a panicked expression on his face. "Lord Koenma, sir! It's an emergency!"

Said Prince of the Dead looked up from where he was stamping papers, an irritated expression on his infantile face. "Emergency? No, it's not an emergency! It's not allowed to be an emergency!" He cried childishly. "I don't have time for an emergency! Look at all the papers I have to stamp! I'm swamped!"

Jorge Saotome quailed. "I'm sorry, sir, but it's the mutants. Your father is very insistent you take care of it right away!"

Koenma paled, stiffening. "Not the mutants!" He wailed. "Why in the name of the River Styx did I even come up with that hairbrained idea!" It had seemed like such a good plan at the time. Play with the genetics of a few humans, make them strong enough to handle the demons that could slip through the barrier, and bingo! Less work for Koenma and more time for his favorite shows. But it hadn't worked out quite the way he'd planned. He still had nightmares about the punishment his father had exacted. At the time, he hadn't been able to sit for a month.

"What did they do this time?" Koenma asked, dreading the answer. So far the problem had been mostly contained, but with a group of mutants in America inadvertently going public recently, it had been one problem after another.

Jorge fidgeted a moment before blurting out, "A high level demon has escaped to America and is gathering mutants for some unknown reason. Your father King Enma has demanded you send the Reikai Tantei at once!"

"But I don't have a Tantei anymore!" Koenma cried, aggravated. "My father fired Yusuke, and I haven't had time to find a replacement! All my prospects are still too young! How do I send the Tantei when I don't have a Tantei?"

The ogre shook his head. "Sir, he means the Reikai Tantei. You're to do whatever you can to make them take the case."

Koenma paused, taking in the implications. Then he abruptly snapped to action. "Get me whichever ferry girl is responsible for that part of America. Let me guess, Bayville?" At Jorge's nod, he continued. "Right, tell her to come to my office immediately. I need her to deliver a computer program!"

Jorge bowed low and turned to race out of the room.

"Ogre, wait! I'm not done yet!" Koenma cried. His assistant ignored him, grabbing the door handle. Koenma grumbled under his breath. Now was not the time! "Jorge! Stop!" Obediently, Jorge paused, hand on the doorknob. "After that, I want Botan in my office. I need her to take a message."

Koenma watched the blue ogre leave and sat back with a sigh. Then, squaring his shoulders, the demigod began to make the orders to lift the shields hiding four very important young men from the eye of one very powerful mutant.

Please review! The story gets started next chapter. The prologue's pretty short, but that's because it's a prologue. The real chapters will be longer. Also, if anyone is interested in betaing this story for me, I would be very grateful! If you're interested, please contact me through my profile.

~Sessha's Crazy