I know that way too many of these Oneshots are set in the Kalos Crisis, but it's the best way for me to ship Ash with Steven/Lysandre/Alain. Enjoy! 

Ash's eyes fluttered open. He saw a dull, grey, dim-lit ceiling above him. Using his hands, he felt the area around him before he sitting up and looking around the room.

A bed. Quite a big one. He was practically trapped in a box of metal. There wasn't a door; no windows? 

Even scarier, his wings were out. Oh, did I tell you? Arceus and the other Legendary Pokemon helped create a son for him a few, uh, billion years ago. He's actually a Pokemon, but his body is structured so similarly to a human that people thought he was. Which was a great thing, since he needed to pretend to be. Arceus wasn't really supposed to have kids.

He was born with feathery wings larger than his body, along with the ability to do, well, basically anything. He's a Pokemon of all types, so he can manipulate water, ice, fire...you get the point.

The only casual situation was his clothes. 

"Ah, so you're awake", mused a spine-chilling voice.

A tall man wearing a black and orange suit walked towards him, his leather shoes echoing with every step. Ash backed away, using his wings to shield himself.

"Oh, don't be scared"

"H-H-How? What?"

"You didn't think anyone would be able to figure it out?", Lysandre explained, sitting on the bed, "I knew there was something about you when you lived through all that Mega Evolution energy. Any normal human would die from it. Then again, you aren't human. And you can't die"

Oh, yeah. Ash is immortal, by the way.

"W-What d-do you w-want from me?"

Lysandre chuckled, smiling as he stroked the feathers on Ash's wings. He backed away even more, so much that his white dress was surfacing the chilly iron walls.

"I don't want anything from you. I want you"

Ash gasped as his eyes widened. Why would such a criminal mastermind want him? Well, then again, he was the most powerful thing in existence.

"W-Why?"

He lowered his wings a little, allowing Lysandre to see the fear in his eyes.

"Are you going to hurt me?"

He watched with slight guilt as the man's smile bent into a frown. He looked genuinely upset.

"What? No, no, I would never"

He leaned closer, toying with the boy's dark hair.

"I want you because you're special. You're...you're something else. You're rare"

Ash still seemed doubtful. The man leaned in closer, the smile on his face hardly evil.

"And you're precious to me"

To his relief, the boy cracked a small, but trusting smile. 

"I...I wouldn't mind being with you. If you weren't destroying my home"

"Then I'll stop right now"

He raised his hand to caress the boy cheek, but was interrupted by a loud bang.

"What's going on here? Lysandre!"

The man's soft, romantic mood was spoiled. He aggressively stood up and turned to face a blue-haired man wearing a suit. Except, his suit was a lot more colorful and less depressing.

"What are you doing with Ash?"

The amber-haired scientist sighed with a tone of annoyance.

"Mind your own business, pretty boy. I'm not hurting him"

Steven strolled towards the bed, grinning cheekily.

"But the world is still in danger. And you're still a criminal"

He watched with victorious sensation as the man ground his teeth, furrowing his eyebrows.

"And he's still mine"

Lysandre threw a fit or rage, screaming his throat out as he sprinted towards the younger adult.

"I'M GONNA KILL YOU"

They two 'mature' men started to brawl on the ground, allowing Ash to safely escape the room. Heck, he even managed to get out of the building. 

Creeping out of the door, thinking he was safe, he stepped onto the cement outside of the lab, exhaling with relaxation, hoping he'd wake up soon and it'd all be a dream, or at least that no one ever speaks of it ever again.

He started to get away from the lab, until he saw a shadow tower over him. Two shadows actually. Ash gulped as he shivered between the crazy yanderes.

"You're not going anywhere..."