A/N Hey guys! So I decided to take down my old Monster Falls and make a renewed one! I finally found out what Monster Falls was about, so here it is!

Narrator's POV

Dipper Pines was walking through the woods, reading the journal. He was trying to read up on vampires, considering Mabel told him she got a letter from a vampire not too long ago.

It said things that most people knew, and some things most didn't. His thoughts came to an end when he tripped over a rock and fell into some river. "What is this stuff?" He asked himself.

Dipper licked a drop off of his fingers. It tasted sweet! "Dipper! There you are!" Said a familiar voice. It was his twin sister Mabel Pines. And she was standing in the river. "Mabel! Don't stand in the water! It's not safe!"

"What are you talking about? You're in it!" She exclaimed, pointing to where Dipper sat. "Yeah, but I fell in it! It was an accident! Get out of it!" He explained as he rushed both of them out of the river.

Dipper scanned the Journal to see if he could find anything. "Aha! Here it is! 'The Fluvius Cantatis. Beware of this river. It may taste sweet but it turns all who touch it into monsters of their personality! The only cure is if that person has a personal revelation. The transformation starts after an hour of contact.' We've gotta go tell Grunkle Stan!" He said.

"C'mon, bro-bro!" Mabel exclaimed as they ran for the Mystery Shack.

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"Grunkle Stan! We've got a problem!" Dipper exclaimed. Stan was selling water bottles. "What is it, kid?" He asked calmly. Dipper pulled Stan to the side.

"You see, me and Mabel accidentally fell into a magic river called the Fluvius Cantatis. We should start mutating into monster in about 20 minutes." Dipper said quickly.

"The Fluvius Cantatis? Man, that is bad. Go up to your room and then we'll see if you really fell into the infamous Fluvius Cantatis." Stan replied grimly. Dipper and Mabel did as they were told silently.

"That's a name I haven't heard for a long time...." Stan muttered.

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Dipper pace his room, waiting to start mutating. He look at his watch and counted down the seconds to transformation. 57... 54... 45... 42... 35... 31... 28... 22... 17... 11... 7... 5... 4... 3... 2... 1... 0.

Nothing happened. "Bro, nothing's hap-" Her eyes widened as she saw her brother's legs start to mutate. They both shut heir eyes, not wanting to see what was happening.

Then Mabel started to feel the mutations on her own legs. When Dipper had finished mutating he saw that he had deer legs. From his torso down, he was a deer.

Slowly, he lifted his hands to his hair. What he felt were deer ears. He almost fainted.



A/N I don't own that picture. 🔝

When he found his sister she couldn't breath. Because she was a mermaid. Panicking, he rushed her to the bath. Turning on the faucet she happily soaked in the beautiful water.

"Dipper! I'm a mermaid! Now I can visit Mermando!" She sighed wistfully. Dipper stared at his sister, trying to decipher what goes down in her brain. She almost died and that's what she's worried about?

Shaking his head, Dipper sneaked downstairs. "Psst! Grunkle Stan! Psst!" He whispered to his Great-Uncle's back. "Kid! What hap-" He clammed up when he saw his nephew's predicament.

Hurriedly, he rushed up the stairs, making sure to hide Dipper. "Okay, so I believe you now. Where's Mabel?" Stan asked. Dipper pointed to the bathroom.

"You're gonna have quite a shock." He said. Stan ran into the bathroom. "Mabel, what are you?" He asked. "A mermaid. C'mon!" She replied happily. Dipper came in. "I'm gonna go inspect the Fluvius Cantatis."

Stan sighed. "What am I going to do?"

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Dipper was walking along the bank of the Fluvius Cantatis for hours. He decided to start running back home so he could inform Stan of how long it was. The river wounded all the way back to the Mystery Shack!

"Grunkle Stan! We have another problem!" He stopped immediately at the sight of Stan, Soos, and Wendy. They were all monsters. Stan was a gargoyle, Wendy a werewolf, and Soos was a Clay Humunculus. (A blob man)

"What happened?! Did you come in contact with the river?!" He asked. Stan looked at him worriedly. "No! We just suddenly changed!" He answered.

"Well, the river ran alot deeper than we expected! Please tell me you didn't touch water from the river in the woods!" He pleaded. Stan opened his mouth in shock.

"I just bottled that water. And sold it to all of Gravity Falls." Stan said blankly. "What? You did what?" Dipper was not happy.

All Stan said was, "Well, CRAP."

A/N Hey guys! So here is my new and improved short chapter! Hope you like it!