Hi and this is a Gravity Falls and Five Nights at Freddy's crossover. Sorry if it's sucky, it just I'm not professional.

It was a normal and warm summer day in Gavity Falls. Soos burst through the door of the gift shop.

"Dudes, you'll never guess what we're doing today!" He shouted.

"Riding ponies!" Mabel shouted.

"Finding UFOs!" Dipper yelled.

"Niether of those!" Soos said. "I saved my pay so we can go to Freddy Fazbear's!"

"YES!"

Dipper and Mabel loved Freddy Fazbear's since they were 5. That's where they had they're first birthday party, and Chica presented the cake. That's why Chica is Mabel's favorite, because they both like cake and parties.

"Freddy Fazbear's!?" Wendy exclaimed. "I'm in!"

(Wendy will do anything to get out of work XD. But she has liked Freddy Fazbear's for a long time, since 4 years after it opened in 1987.)

"Grunkle Stan we're going out to pizza!" Mabel yelled, and Stan muffled something about not spending too much money.

They arrived at Freddy Fazbear's and Bonnie greeted them. "Welcome to Freddy Fazbear's. This way to your seats."

Bonnie lead them to a booth near the stage. Dipper brought the journal with him to read while waiting. Then he accidentally dropped it. As he reached down to get it, he noticed a note. "Guys, look at this." Dipper said, pointing to the note.

It said (in sloppy handwriting),

We are trapped! The imposters have been up to no good! PRESS THE BUTTON AT THE END OF THE TABLE 3 TIMES.

The gang couldn't believe it.

Someone was trapped. No, a GROUP of people were trapped.

Mabel pressed the button 3 times. The floor opened and they gushed into it.

For what felt like forever they fell until they hit hard ground. "This must be the basement." Wendy said. "Super creepy."

"Hello?" A voice spoke. It sounded like...

"Chica?" Mabel spoke. "Is that you?"

A light switched on. The group gasped.

There were the animatronics, who were supposed to be upstairs!

"What!?" Wendy exclaimed. "Aren't you guys supposed to be upstairs!?"

"That wasn't us." Foxy said.

"It was evil us." Bonnie said.

Dipper took out his journal and Freddy gasped. "You have his journal!" Freddy shouted.

"The author?" Dipper asked. "You knew him?"

"Yeah." Freddy said. "He was the first to find out that the us upstairs were evil clones. He secretly visited us until...he disappeared."

"How long ago has it been?" Mabel asked.

"30 years ago." Chica added.

"Hmm..." Dipper thought. Then a lightbulb went off in his head. "Why not we applied for the night guard job! We can get rid of the imposters and free you guys!"

"But it's dangerous with evil us!" Bonnie said. "People have been killed!"

That scared them. People...killed?

But they were going to finish what the author started. They were going to set Freddy, Chica, Bonnie, Foxy, and Balloon Boy (He's there,too), free, even if they were dead in the end.