Gideon

I stood on the side of the driveway as the government agents pulled up about twenty minutes after I had called them. Everyone was partying behind the shack, and Grunkle Stan was inside, so hopefully nobody would see me.
Agent Powers and Agent Trigger got out of the car.
"Guys, I am so glad to see you! Working together we can crack all of the cases of Gravity Falls."
The agents looked at each other skeptically as I handed them the journal.
"This book is the lead you've been looking for! I'm thinking forensics, researchers. Do you guys have helicopters?"
"Kid, I'd love to believe you, but this looks like something from your uncle's gift shop." He held out the book for me to take, which was on the Leprecorn. "I can't be the only one who thinks this isn't funny."
"I can confirm, not funny." Agent Trigger agreed.
"No, it's real!" I took the journal. "You should send it to the lab or something!"
"Your uncle was right about that overactive imagination of yours. We have paperwork to fill out." Agent Powers started to walk away.
"Boring. Paperwork." Agent Trigger added.
"Stop emphasizing everything I say." Agent Powers said.
"No, no! This is real!" I called after them. "Cursed objects, gnomes, spells!" I started reading a random spell from the page I was on. "Corpus levitus! Diablo dominus! Mondo vicium!"
The ground started to shake, and a large crack appeared behind me. The agents turned around, and I jumped back as the crack widened. A long moan was heard as a scraggly, boney hand reached out with flesh falling out. The creatures skull popped out, with green slime falling off, as it pulled itself up and started walking toward us.
"See, a zombie! 100% real, actual zombie. Can I work with you guys now?" I begged.
The agents looked panicked as the zombie dragged its feet towards them.
"What do we do?" Agent Trigger said.
"It's just one zombie. I see stuff like this every day." I said, and I started to look through the journal for a solution, when the zombie roared in my ear and lunged at me. I screamed as Agent Powers picked up a rock and bashed it over the zombies head, making it still.
"Good thing it was just that one." I sighed in relief. The ground shook again as if on cue, and more deep cracks opened up with green most poured out. More zombie hands and heads reached out and started coming to us.
"You guys can help, right?" I asked, as we backed up.
"Kid, we've been chasing the supernatural for years, but never have we seen anything like th-" Agent Powers' sentence was interrupted by zombies attacking him and Agent Trigger, who slowly dragged them away into the dark forest.

Pacifica

Dipper came back to the party twenty minutes later, wearing a clean shirt.
"Dipper!" I squealed. "You're back! Just in time for our song!"
"Yay...?"
"Why did you have blood on your shirt, anyway?" I asked him.
"No reason." He quickly said. "Just had to take care of some business."
"Business?" I asked, crossing my arms. "Did you-"
"Kill someone? Yes. I had to for a good reason."
"I'll only excuse you now if you do a song with me! Come on!" I grinned, grabbing Dipper's arm and dragging him up to the stage.
"Hey guys, is this party legendary or what?" I said into the microphone. The crowd cheered. "I say kara, you say oke! Kara!"
Someone in the crowd screamed.
"Kara!"
"We're all going to die!"
Why does that never work? I thought, as the ground started to shake beneath my feet.
"I think it's a earthquake!" Wendy screamed, and blowed an air horn, which turned out to be spray paint. I guess she was going to do some graffiti afterwards. She took out another can, which was the air horn, and blew it. "Everyone, let's get out of here!"
The crowd rushed away in a large stampede as me and Dipper were left standing on stage.
"No, don't leave! Love Patrol Alpha hasn't played yet!" I called out. Gideon came running out from the forest, and stopped in front of us, trying to catch his breath.
"Gideon, what's the one thing I asked you not to do tonight?" I demanded.
"Raise the dead." He said.
"And what did you do?"
"Raise the dead."
A swarm of zombies came out of the trees, and me, Gideon, and Dipper quickly ran to the front porch of the Gift Shop, where we ran inside and locked the door. The zombies banged against it, trying to get in. We rolled the large Aztec calendar rock wheel in front of the door.
"Maybe they're just a really ugly flash mob?" I suggested.
A zombie hand broke through the window, and we screamed, frozen in fear. Dipper's amulet glowed ominously in the darkness as he tried using his amulet to float the zombies up in the air, but there were too many.
"What do we do? Where's Grunkle Stan?" I screamed.
"How's he supposed to help? He doesn't even believe this stuff!" Gideon said, as zombies crawled through the broken window. Dipper pulled me back as the zombie crowded around us. Even he looked scared.
He shook his amulet. "Why won't it work?! I'm never scared! Why isn't it working now?"
"Isn't there anything in our journals?" I asked Gideon. Dipper shook his head, while Gideon looked through his.
"No!" He cried. "There's nothing in here about weaknesses! I wanted answers so bad I put everyone in danger."
A zombie grabbed Gideon and picked him up.
"Pacifica, I'm sorry!" He screamed, as he tried to shake himself out of the zombies grip.
"Gideon!" I screamed, trying to run to him and zombie, but Dipper held me back.
"No! You'll be killed, too!" Dipper said.
"Gideon!" I screamed, as the zombie reached to bite him when something hit the zombie, sending its head flying away and dropping Gideon.
A foot crushed the zombie head, and Grunkle Stan stood in front of us, holding a baseball bat.
"You three, attic, now!" Grunkle Stan yelled.
"Gr-Grunkle Stan?" Me and Gideon were in shock.
"I said, NOW!" He yelled again, and me, Gideon, and Dipper darted out of the Gift Shop and up the steps to the attic. Grunkle Stan followed us, bashing zombies with the bat or punching then with his golden rings. On the ledge of the stairs, he pushed down an old grandfather clock, which would occupy the zombie for a minute.
We all ran into me and Gideon's bedroom, and locked the door behind us.
"Grunkle Stan, that was amazing!" I said.
"At least now you can't deny that the supernatural exists, right?" Gideon said.
"Kid, I've always known." He said.
"What are you talking about?" Gideon demanded.
"I'm not an idiot, Gideon! Of course this town is weird! And the one thing I know about that weirdness is that it's dangerous. I've been lying to you, to keep you away from it." Grunkle Stan glanced away from the door the zombies were pounding on and outside at the crowd of zombies on the front lawn. "It looks like I didn't lie well enough."
"What do we do?!" Dipper asked, nervously pacing. "My amulet isn't working!"
"Normally the journal would help, but there isn't anything in here about defeating zombies!" Gideon held out the page against zombies in a turned-on black light. New text glowed.
"Gideon, look!" I pointed out.
"Invisible ink!" He said, looking at. "Zombies have a weakness! Their skulls can be shattered in a three part harmony!"
"Karaoke time!" I squealed.
"Good thing it's only three part..." Dipper mumbled under his breath.
"Don't worry, Dipper, I'm sure four part can also work!" I said. He sighed. "You said you would sing with me, right?"
"No." He groaned. I kissed him on the cheek.
"Now will you sing?"
"Okay."

Dipper

Needless to say, I wasn't excited about the singing as Pacifica dragged her karaoke machine to the top of the roof and turned it on.
"Hi! I'm Pacifica, this is Dipper, Gideon, and Stan, and we're Love Patrol Alpha!" The zombies curiously looked up at us.
"I never agreed to that name." Gideon quickly said into his microphone, as the music started playing.
"Our lives may not be worth this." Mr. Southeast said.
"Nonsense! Start singing!" Pacifica pointed to Gideon, who hesitantly held up his microphone.
"Friday night, we're going to party til' dawn. Don't worry, daddy, I've got my FAVORITE DRESS ON?! Pacifica, this is stupid!"
"We're rolling to the party, the boys are looking our way. We just keep dancing, we don't care what they say! And all the boys are getting up in my face." A zombie popped on the roof right in front of Pacifica, and I kicked it off. "Guys, we have to sing together or it won't work!"
"Boys are a bore, let's show them the door," Mr. Southeast sang.
"We're taking over the dance floor!" We all sang together. "Oh oh, girls do what we like, oh oh, we're taking over tonight! We're queens of the disco!"
The zombies started screaming in agony, ripping their ears off while they mournfully screeched in pain as their heads exploded.
Maybe this wasn't so bad after all.
"Taking over toniiiighht!" Gideon sang.
"Duck!" A zombie appeared near Pacifica, and she fired the confetti cannon at it. "Thank you! We'll be here all night!"
"Deal with it, zombies!" Mr. Southeast called out, laughing, as the former zombies lay headless on the grass.
"So, how are we going to explain this to the next tourist group?" Gideon asked.