AN: Behold! My dumb crossover idea! It's pretty simple and this'll maybe have 3 or 4 chapters, and no crazy overarching story, because I am not good at those. More of a slice of life if you can have crossover slices of life. Yup.

If you like it, a review, favorite, or follow would be much appreciated.

"Steven," Garnet said in her casual, flat voice. "you are going on your very own mission."

Steven immediately broke into a huge smile, his eyes glimmering. "I am!?"

"Yes. We are looking into possible gem activity in a small city called Gravity Falls, Oregan. We need someone to blend in and get information from the locals while we study the gem structures in that area. See if they've seen anything weird."

"But why not you, or Pearl, or Amethyst?" Steven questioned , and then quickly added, "not that I'm complaining."

"Um, Steven, have you even looked at us?" Amethyst blurted out. "We aren't exactly the 'blending in' type."

"Oh. So you want someone human-y then?"

"Basically." Garnet walked over to the warp pad, Pearl and Amethyst following suit.

"Now Steven, you can't tell anyone about your gem. For this mission you are Steven Universe , ordinary human boy." Pearl gestured him up onto the warp pad. "We got you a place to stay and everything."

"Wait! This is going to be a more than one day mission?" Steven broke into a huge smile. The gems hardly ever went on multi-day missions, and they never brought him with them. His expression turned to concern as a thought crossed his mind. "But what about Lion? I can't leave him here all alone!"

Pearl sighed. "Bring him if you must, but you can't let anyone see him."

"Okay!" Steven woke up the gigantic sleeping cat and dragged him onto the warp pad, the five of them warping off to the odd little town of Gravity Falls.

Dipper cleaned the glass on the mini-dragon exhibit (which was actually a lizard with tiny fake wings glued on) and stared at his reflection. It was mid-morning and there was absolutely nothing interesting happening. Usually by now at the very least there was something, even if it was as small as Stan announcing a new gift shop item. But right now there wasn't even a customer.

"I'm sooo booored." Mabel whined. "Something needs to just happen already!"

Stan walked into the room. "Kids, we're having a guest. If he's creepy, don't follow him to his room. That is all." Stan walked back out, satisfied in his ability to announce important plot points at exactly the right times.

"New guest!" Mabel stood up immediately. "I wonder when he'll be getting here? I love new guests!"

"I don't know, but I hope he'll be interesting. Not a werewolf would be nice."

Mabel nodded at Dipper's comment, remembering the last guest that spent the night at the mystery shack. She had learned that werewolves are not quite as hot in real life as they are described in books. And movies. And well, anything, really. They are quite scary, in fact.

The gift shop bell rang and the twins rushed to the store portion of the shack. Waiting for them was a brown haired boy, maybe 11 years old, carrying a suitcase. He wore a pink shirt with a star in the center and flip flops with jeans. "Hi! I was told this was the mystery shack, I think I'm staying here for a few days!"

"Oh my god! Stan didn't tell us it was a kid that was staying!" Mabel immediately ran over to the boy. "I'm Mabel! My brother over there is Dipper."

"I'm Steven, a completely normal human that is by no means anything else."

Dipper squinted at Steven. Either this kid was hiding something and really bad at it or he was really bad at making jokes. He looked normal enough. Just like any other kid. Hm.

"Welcome to the shack, Steven. I'll show you where you will be spending the night." Dipper gestured over Steven and began to lead him to the room where they had found the body swapping carpet. "Futon, bathroom. Any questions?"

"Um, yeah." Steven scratched the back of his head. "Have you seen anything odd around here?"

Dipper stared for a second. Okay, this boy was hiding something. "Maybe. Why do you ask?"

"Just curious."

"Alright. Well then, I'll be in the attic if you need anything." Dipper walked up the stairs. Steven *looked* normal enough. But why would he include the "perfectly normal human" bit and ask about weird stuff? He looked out the window and did a double take. Slinking out of the entrance to the shack there was a lion, but not any lion. This lion was pink.

He sprinted back downstairs and ran to his sister, who was sitting at the table.

"Mabel! Did you just see anything?"

She shook her head. "Why?"

"There was a lion! Coming out of the shack! But it wasn't like a normal lion, it was pink!"

"Awww, a pink lion! That sounds adorable!" She looked at Dipper. "Calm down bro. Let's ask Steven, maybe he saw it?"

Dipper nodded. If Steven acted strange about this then maybe he would know that he was onto something.

The twins walked over to Stevens room. The door was wide open, and they could see it.

But Steven was nowhere to be seen.

Dipper flicked through the journal, looking for anything on lions. Nothing. But then a page caught his eye.

Shapechangers

Shapechangers are generally humanoid creatures that can turn into something else. They differ from shapeshifters in that they generally are limited to one or two forms and they maintain physical differences from whatever they shapeshift into (eg color or size). They also have a main form that, on all outward appearances, looks human. They often maintain a cheerful demeanor to throw off any suspicion.

Dipper gasped. It all made sense! Steven was a shapechanger, that was a very possible explanation. He could turn into a lion.

He turned on the blacklight. Very dangerous and aggressive- avoid at all costs. If you come into contact with one, do not engage. He shined the light over the weaknesses section of the page. Beeswax can be effective in expelling young ones.

"Hmm." Dipper mumbled, just to himself. "Beeswax. I think Mabel has some beeswax chapstick."

The trap was set. The doorway to Steven't room had been completely lined with beeswax. Three whole tubes, in fact. The journal said the physical act of walking through the doorway should weaken them to the point that they are dispelled. According to the journal, even older ones will be noticeably affected. So either way Dipper could confirm he was a shapechanger.

Dipper heard footsteps coming down the hall and hid inside the room. Holding his breath, the waited as Steven appeared just outside the doorway.

Step. Steven paused to look over his shoulder, as if checking that no-one was following him.

Step. Almost there.

And Steven was in the room. Unaffected, looking just as he did before.

Dipper let out his breath. Okay, so he wasn't a shapechanger. Good news, right? That would surely mean that Steven was just a normal human being, right?

Probably.