Poorly put together summary. I swear it sounded better in my head.
Three friends wander into an old house which was said to be haunted by the last person to rent it. Making their way into the attic, they find a chest containing three boxes. The next morning, after each taking one, they find themselves in a different world as Pokémon!

A/N: SKIP THIS IF YOU WANT, ITS NOT REALLY IMPORTANT.
This is my own take on Pokémon, mostly on how it's suppose to be in the real world, without losing the whole 'POKEMON ARE SUPPOSE TO BE OUR FRIENDS! LALALA! RAINBOWS AND FRIENDSHIP!' regardless that people do eat Pokémon and Pokémon eat each other as there is a circle of life.
The first few chapters will have few pokemon, seeing as this is a suburban area and there are very few wild Pokémon running about. It will eventually evolve into an actual Mystery Dungeon story at some point, so all you have to really do is be patient as I slowly write this and get writer's block.

Lexi ran to Cellach Academy gates where she was meeting her two friends. She had told them about this old house that her grandmother had owned. Well, still owned. It's just that no one has lived in it for a long while and it's long over due for renovations.

As Lexi reached the gates, her dark outfitted friend David asked her, "So, where are we goin' again?"

"My grandmother's abandoned house," she laughed, catching her breathing.

"Won't we be arrested for breaking and entering?" Benjiman said quietly.

Lexi threw and arm around his neck. "No, not at all. We're not gonna break anything. David's gonna pick the lovely locks with his AMAZINGLY lovely skills. Plus, it helps that my grandmother STILL owns the place."

David and Ben looked skeptically at her. She just waved them off and started walking in the same direction from where she came. She waved for them to follow.

"I asked some of the kids around here and they say Granny Grindle's place is haunted," she said matter-of-factly.

"Haunted? Why?" Ben inquired.

"Something about the last guy who rented it dying in there," Lexi said, playing with her blue scarf. "Sounds like fun, right?"

Ben started shaking, thinking of all the things that could go wrong.

David looked between him and Lexi. "That borders on the creepy and murder obsessed, Lex."

"I know," she giggled. "Oh! Here it is!" She ran up to the porch of the house.

The two boys looked up, taking in the height of the house.

"Lex, usually when I picture a house, I picture one, occasionally two, floors. Not three. And definitely not with a giant glass SILO," David said, taking one hand out of his pocket to point up at the house.

"I have to agree with David on this," Ben said, following Lexi onto the porch. "It isn't really as, um, small as I had pictured. Or steady."

""It's a greenhouse, by the way, David, not a silo. And come on, you party poopers. This baby had held herself up for over a hundred years," she said patting on of the beams.

David jumped a bit as he stepped onto the porch as if waiting for something to fall. He mocked looking around before standing up straight, "Sorry, I was waiting for the entire complex to fall."

Lexi laughed again before getting serious. "Just unlock the door."

"Fine, fine, fine," he said kneeling down next to the door, taking out his lock picking equipment.

Lexi leaned again the pillar and Ben walked up next to her. "So what are we going to be doing, exactly?"

Lexi looked into space and thought. "Just exploring, I suppose. I'm not really sure. I've just always wanted to check this place out."

Click.

"Got it," David said opening the door. He waved his friends through. "Lady and Benji first."

When they got through, he close the door behind him. They looked around the dark, dusty room. It wasn't big considering the size of the general, but then again, it was just the entry hall. As they walked further inside, they saw the actual size of the house in the living room. It would've been beautiful, had it someone been taking care of the place.

Lexi reached for her small backpack and pulled out three flashlights and handed them to her friends. "Let's get exploring, okay? David, take this floor and the basement, if you can get to it. Ben, look on the second floor and look through all the bedrooms. I'll take the attic and see what I can find up there."

"Hopefully not a bunch of Haunters or Gastlies," David laughed, turning on his flashlight and walking off.

Lexi and Ben walked up the stairs to the second floor. She led the search for the next staircase, opening every door, trying to find the way up.

"You find the way yet, Benji?" Lexi asked, closing yet another door.

"No," he said, doing the same. "I'm sorry, Lexi. I don't think, we'll be able to find it."

"Did you ever try looking up?" David came up from nowhere, making his friends jump.

"GOD, DAVID! Don't do that!" Lexi said, putting a hand to her chest.

"Okay, I won't. But did you look UP?" He asked again, pointing to the ceiling.

"No, we haven't." Lexi rolled her eyes before looking upward and saw a string dangling from the ceiling. "Huh. Well, then. Found the attic. Lets check it out." She stood on her tip-toes and tried to reach for it but couldn't quite do it.

David, however, reached up and grabbed it with ease, and pulled it down. He smirked down at her.

She pushed him, grabbing the folded ladder and set it straight. "Show off. Come guys. Let's finish checking this place out."

She climb up it and stuck her head through the hole with her flashlight and peered around, making sure nothing would pop out and scare them. Once satisfied with the once-over, she climbed the rest of the way in and started walking around. Her friends followed and branched out to look through the entire attic.

There was a bunch of old lamps and boxes of books and toys lying around, stacked onto one another. There was also a bunch of cobwebs, much to Lexi's displeasure. She used her flashlight to push most of them out of the way. She moved boxes and looked through them to see if she could find anything interesting. Besides some books, glass dolls, and old skeleton keys, she couldn't find anything.

"Hey, David, can you come here for a minute?" Ben called to him.

Regardless that she wasn't called, she stalked over anyway, trying not to trip on boxes and nails. Ben had found an old chest, and a pretty big one at that. He was crouched in front of it, dusting it off and looking at the lock.

The lock on the chest had a very unique design on it, to match the design of the chest. Had the entire thing been smaller, she would've picked it up and taken it home.

"Good find, Ben," David said, crouching next to him. He took out his lockpicks and started messing with the lock. He had managed to break three of the lockpicks before finally getting it open. "Damn, that was one tough lock. Now let's see what's inside, shall we?"

"Oh! Wait, wait, wait!" Lexi waved her hands frantically trying to keep him from opening it just yet. "Let's be dramatic and open it slowly, like in the movies!"

David stared at her for a second before just shrugging. "Let's open it together, then, okay?"

Lexi, who was at this point bouncing up and down, and Ben nodded their heads and put their hands on the top of the chest. Slowly, they all lifted the lid, a puff of dust escaping as they did. Once it was open all the way, they peered inside. There were three smaller wooden chests all of different colors, though dark all the same. The one on the farthest left was designed with sharp purple-grey lines. The middle one had a more smooth design and shined blue whenever the light had managed to touch it. The right one had more contrast in colors, as the flame design seemed to glow red.

Around the boxes were carefully arranged stones. If they had any sort of significance, the three teenagers could not think of one. The stones were multicolor, most being blue purple and black and maroon.

Lexi was the first to try and reach into the box, but was stopped when a Misdreavus appeared from nowhere and screamed. The three teens yelled in surprise and ran for cover. Each kid ran back to their sides of the attic and hid, but Ben just ended up falling down the ladder.

A/N
Well that's it for now. If it seems that there's suppose to be more at the end, then it's because I'm writing the entire thing as one story rather than in chapters, so this is all cut-and-paste editing.
Fanfiction changed the format of which I was typing so sorry if there's a confusing bit. Just roll with it.