The many different ways Harry Potter could have been raised.

Ghost Pokémon are trolls

In the bushes of Little Winging, a pair of ethereal figures watched the old human with the long white beard place a note beside the small human baby.

"Sleep well… Harry Potter." With that, the old man straightened up, and walked away slowly, occasionally clicking a small device that he held in his hands to restore the lights. Once he'd restored them all, he disappeared. The huge human got back on the flying motorcycle and flew off into the clouds, and the old human woman also disappeared. A ghostly hand pushed a part of the bushes aside.

"So, they're gone?'

"Looks like it." With that, they came bursting out of the bushes, and looked around. The Gengar who had been watching kept a careful eye out, while the Haunter carefully floated over to the young boy.

"There's something in his head, by the looks of things. Some kind of extra soul, I would say. Definitely not a friendly one." The Gengar tilted its head, curiously, and then used Detect to confirm it. No doubt about it, the boy had an extra soul in his body, linked to the scar.
"Well, we can't have that. Let's get rid of it."
The Gengar prepared a Shadow Ball, and fired it directly at the scar. Harry Potter, the boy who lived, slept blissfully on as the piece of soul that was Voldemort was taken out in one hit.

"Super Effective." The Haunter, meanwhile, was having a panic attack.

"That could have been really dangerous! He's one of those Psychics-"
"I wasn't targeting him, I was targeting the Ghost-type soul in his head."
The Haunter sighed, pressing a free-floating hand to its forehead.

"So, you want to take him with us?"
"Yes."
With that, the Gengar grabbed the basket and took to the skies, flying about like a mad Pokémon.
"To Sinnoh!"

Albus Dumbledore looked up from his tankard of beer at his vice-headmaster.
"What is it, Minerva?"
"Harry Potter has disappeared." Dumbledore almost broke down there and then.

"What?" Minerva was looking pretty shaken up herself, he noticed.
"Harry Potter's magical signature has moved to an unplottable region of the planet. We can still travel there, of course. It's just that the area is the area of those Pokémon animals." Dumbledore sighed. Not only had the prophecy about Voldemort meant that this was a huge complication in the death of Voldemort, not only had two loyal members of the Order of the Phoenix died tonight, but Harry Potter, the Boy Who Lived was now in an unplottable region where the prevalence of magical creatures that could easily kill a small child was incredibly high. He resisted the urge to buy a Muggle pistol and shoot his brains out by coming up with a plan.

"We'll send Harry Potter a letter. If we can find where he is, then we at least know and can check on him." With that, he hurried with surprising speed to his office, while Minerva, so shocked by the events of the day, that she sat right down and started drinking form a hipflask.

Harry Potter, meanwhile, was feeling nice and full after drinking from a Miltank. IN the forest glade around him, a couple of Girafarig looked in curiously, while a group of Bidoof were busily constructing a small shelter. He felt happy here, and it was certainly warmer than when he'd been flying through the air like that.

"Aw, it's adorable!"

"I know, right? I just saw him there, on the side of the path, and I just snatched him up!" While the Gengar related his story to a couple of attractive Gardevoir, Harry Potter was being entertained by another Gardevoir's psychic powers, laughing at the coloured lights that he vaguely remembered.
"You know, he's your responsibility."
"I'll make sure that he's fed and stuff, alright?"
Just then, a large Hoothoot came, bearing a letter.

"It's for the human baby there." The Gengar snatched it, opened it and read the contents.

"Blah, blah, blah, wizarding school, blah, blah, very important you keep him alive and well-educated, signed Albus Dumbledore." The Gengar looked around.

"Okay, as soon as he's able to learn, I'll teach him all that human stuff that they think's so important." With that, the Gardevoir were all over him again, leaving Haunter to sigh and start making a checklist for things he needed to steal.

Albus Dumbledore waited anxiously for the Pokémon Hoothoot to come back. It was the only magical animal that the wizarding world actually used to communicate with the regions of Kanto, Hoenn, Johto, Sinnoh, Unova and the recently discovered Kalos. The Hoothoot came back with a piece of what looked like fabric tied to its claw. Taking it off and rewarding it with a Poffin, he read it.

tACKing cAre Of Tha Bayb. GEngAR. Dumbledore just sighed. A Pokémon was looking after the Boy Who Lived. Great. His day couldn't get worse.

"Dumbledore, here's the paperwork."
The day got worse.

Authors' notes: And… DONE! New chapter of this magnificent fic up and running. Next time, Harry Potter is taken in by the Uchiha clan.

Yeah, none of these stories are related at all. They're just there because they need to be there.