Something I have been wanting to write for quite a while. I am a HUGE Gravity Falls fan, and a huge Pokemon fan. I grew up watching the 2nd Season of Pokemon up until the Unova Arc Ending, but the first games I've ever played of Pokemon were Diamond and Pearl. I grew up with Generation 4 as that's what got me into Pokemon.

When Gravity Falls debuted on television, I thought it was an incredible show. I watched it until the end of Season 1 and I happily await Season 2. Considering the fact that mysterious entities and people appear throughout the course of the show, I thought to myself, It wouldn't be surprising if Pokemon made an appearance in Gravity Falls.

But I've rambled too long. Just as a note, the main characters will only catch Pokemon from Generations 1, 2, 3, and 4, considering this takes place in the Sinnoh region. Their will be 1 exception with a Generation 6 Pokemon, however. Pokemon from Gen 5 and 6 will appear under the ownership of trainers, maybe gym leaders to mix it up. The plot for this story will carry heavily from Platinum more than Diamond and Pearl, but it will incorporate all 3 games, even if they have similar plots.

Now, to begin with a hefty introduction!

-Prologue-

-Road to the Sinnoh Region-

It was a normal, sunny day in the town of Gravity Falls, Oregon. Actually, it was anything but normal, as usual. A big attraction in the town of Gravity Falls was the Mystery Shack, under the ownership of Stanford Pines. Originally his own home, he had converted it into a tourist attraction to make profit and sell merchandise. The Mystery Shack's main gag was to show off "mythological creatures," most of which are just fake sculptures and pictures put together by Stanford himself. He normally ran it with only 2 other employees, Wendy, a teenager who worked as the cashier, and Jesus, or "Soos," a "man-child" who worked many odd jobs around the Mystery Shack. This changed one summer, when Stanford's great-nephew and great-neice came to visit.

The two kids in question are Dipper Pines and Mabel Pines, two "biological twins." Although different genders, the two are very much alike. For example, they are the same age and they look similar in some ways. Both of them were 12 at the time (with Dipper being "5 minutes older" than Mabel) their biggest adventure began.

One day, while the two were working at the Mystery Shack, their great-uncle Stanford (who will be referred to as Stan from now on) had gone out in to the woods, trying to think of a new attraction to add to the Mystery Shack.

"Maybe a… steak mixed with a dinosaur? T-Bone Rex? Nah, that's not gonna work…" He said to himself. He had rambled and walked at least a few miles from the shack. He continued rambling before he tripped over something and fell to the ground.

"Dang, my knee…" Stan said to himself, before getting up. "What the- a briefcase?" Stan picked up the briefcase he tripped over. He saw it had a lock on it. Knowing he couldn't open it without the key, he reached into his pocket and pulled out a screw driver. He jammed the it into the lock and broke the briefcase open, revealing 3 round red balls with white bottoms. A black line ran through the middle, which centered into a round white button.

"What are these things?" Stan thought. He picked one up and tried to break it open with the screwdriver but to no avail. He sighed, but decided to take them with him anyway.

He walked back to the shack, but on his way back, he felt like he was being watched. He walked into an open clearing before being ambushed. A giant red spider like creature burst out of the bushes into the clearing. It had 4 legs and 2 long spikes on its back. The spider approached Stan. Frightened, Stan picked up one of the balls.

"Stay back!" He yelled. He chucked the ball towards the spider. It bounced off of its head and opened up. Stan was shocked to see a beam of white light emerge from inside of the ball. It hit the ground and vanished revealing a small, orange chimp with fire where its tail should be.

"Chimchar!" The chimp happily shouted. It quickly noticed the approaching spider, and let out a flame attack, shooting multiple little fires from its mouth. They hit the spider and sent it scurrying back into the woods. The chimp returned inside the ball afterwards, leaving Stan shocked at the sight he had just witnessed. Quickly, he gathered up the balls and ran off toward the shack.

Stan had made it back to the Mystery Shack in one piece. He entered the front door to the living area, set the balls down on a die table, and picked up the phone. He nervously dialed a number before it picked up.

"Rowan, it's Stan." Stan said. "I think I found your briefcase."

"Ah Stan! Good to hear from you!" the man on the phone said, named Rowan. "Where did you find it?"

"In the woods behind the shack. You must've left it here last time you came to visit." Stan looked at the balls. "I was ambushed in the woods by… something. But one of those things came out of a ball inside your suitcase and saved my life."

"Hmm… Pokemon you mean? I didn't expect to see them in the wild down in Oregon. Which one came to your aid?" Rowan asked.

"The fire monkey thing." Stan replied.

"Ah, Chimchar. He's a feisty one." Rowan said. "Don't you have a niece and nephew? Maybe they would like to come up to the Sinnoh region!"

"Wouldn't they need a Pokemon for protection?" Stan asked

"They could use the ones in my briefcase" Rowan replied. "A Pokemon adventure seems fitting for them."

"Gee I don't know… I guess I could let them go up there." Stan said. "Where is Sinnoh anyway?"

"It's in the northern area of Japan." Rowan said.

"That seems far… okay, they can go." Stan said.

"Okay then. I expect them arriving in Twinleaf Town on a plane tomorrow." Rowan said, before hanging up. Stan also hung up the phone. He thought that this Pokemon adventure would be a good experience for Dipper and Mabel.

"Kids! Get down here!" Stan called upstairs. Dipper and Mabel walked down the stairs.

"What's up, Gruncle Stan?" Dipper asked. Gruncle Stan was how the two would often refer to him. He and Mabel sat in front of Stan, who sat on the couch.

"Look, I have a colleague up in Japan. He lives in Sinnoh, and I'm going to send you two up there." Stan said.

"What? Why?" Mabel asked.

"Because of these." Stan set down the broken briefcase and opened it, revealing the balls that contained Pokemon.

"My colleague goes by the title of Professor Rowan. He studies creature called Pokemon, and they normally inhabit Japan as a whole.

"I'd like to send you kids up there on a Pokemon adventure, just to give you something fun to do on your summer break." Stan said.

"I think I've read about them in the paper." Dipper said. "Didn't the Gravity Falls Gossiper talk about the outbreak of Pokemon that traveled from Japan?"

"Yeah, it did. But that was only yesterday's issue." Stan said. "You get to pick one of these 3 Pokemon."

The poke balls opened once again, revealing Chimchar, the monkey from before, a green turtle pokemon with a twig on its head, Turtwig, and a blue penguin Pokemon, Piplup.

"I like this one!" Mabel said, picking up Turtwig. "He reminds me of Waddles!"

Dipper looked at Chimchar. He liked the way this one looked, fierce and powerful, yet adorable.

"I'll take this one." Dipper said, picking up Chimchar.

"Then it's settled. Here," Stan gave the two plane tickets. "These will take you to Twinleaf Town in Sinnoh. If you want to make it on time, you will have to leave now."

"Thanks, Gruncle Stan!" Maybe said happily. "Wait, can't I bring Waddles?"

"I'm afraid he has to stay here. I don't know if it will be okay for him to be out and about in Sinnoh.

Mabel frowned. But she understood. She smiled, hugged Waddles goodbye, took Turtwig's Pokeball, and ran out the door.

Dipper took Chimchar's Pokeball.

"Thanks, I'll have a good time." Dipper said, smiling. He left to follow Mabel.

"Oh wow!" Stan turned around to see Soos standing in the doorway.

"Soos, good timing." He put Piplup in its Pokeball and handed it to Soos. "I need you to go with the two and make sure they don't get into any trouble, alright?"

Soos saluted.

"Yes sir, mister Pines, sir!" Soos said, and he ran out to follow them.

Stan smiled, but then realized something. He bolted out the door.

"Hey Soos!" He called. "You forgot your plane ticket!" He caught up and gave it to him.

"Thanks, mister Pines!" Soos said, and he ran back toward Dipper and Mabel.

Stan smiled at the thought of 3 of his employees out on a Pokemon adventure.

"Reminds me of the time I was on an adventure." He said to himself. "Rowan better be taking care of my Charizard." And he went back inside.

-(End Of Chapter)-

Well, I have successfully begun the story! Make your predictions on which Pokemon the three will catch! Stay tuned for the first official chapter!

~087-B