"Dipper, there is one last thing to prevent Bill's reign of terror for good. You must climb to Mt. Ebbot, not far from here, and retrieve some inter-dimensional travel-block. It will prevent Bill from ever crossing into our realm, and taking over our world." "Ok Great Uncle Ford. I'm on it-" "Oh and Dipper?" "Yes Great Uncle Ford?" "Take Mabel with you. Its dangerous to climb Mt. Ebott one. Legends say that those who climb the mountain never return. Be careful Dipper," "I will. Thanks Great Uncle Ford." ~§~§~§~ Dipper and Mabel Pines are your average twins, spending the summer at their "Grunkle" Stan's Mystery Shack. But, as the summer progresses, Stan's twin brother, Stanford, returns. Bill, the evil inter-dimensional mastermind plans to cross over into the world of Gravity Falls, and the apocalypse of "Weirdmageddon" draws near.Then the twins are forced to Mt.Ebott, where theyll do the unthinkable...

What if Chara and Frisk get stuck in Gravity Falls? Just read for explanation.

Frisk, your little sibling, freed every monster in the underground, and everyone is now in the surface, but now that it's summer time, our heroes Frisk and (Y/N) will meet our other heroes from gravity falls, dipper and mabel, oh didnt i mention that you live in gravity falls with toriel, sans, papyrus, undyne, monster kid, alphys, mettaton and asgore? oh and not to forget, chara, asriel and gaster (no its not glitchtale). all coming event are after weirdmageddon, and you've been living in the surface for 1 year, the asriel fight happend during weirdmageddon and you are 18 while frisk is 12. enjoy! WARNING: there are some of my OCs in the story, one of them is jingix, he's a villain, and well, he's made of hate,LOVE, fear and determination and he wants to end the world, he's a replacement for bete noir from glitchtale, but because i don't own glitchtale that is from camilla cuevas from youtube, i'll use my own character, he looks like a mini devil- you know what, imma put a pic of him when the time comes.

(Pasting form Quotev) Mabel and Dipper find legend about this race called monsters and how they were banished underground. Dipper wanted to find out about it, so Dipper and Mabel set out to the infamous mountain where it all began. But, Mabel trips and grabs onto Dipper. They both fall down. What will happen?

"Don't worry, Sans... I'll never forget you..." Mabel and Dipper Pines are not your average twins. After arriving in Gravity Falls for the summer, they found themselves in a world of danger, that could soon be ending. Bill, an inter-dimensional being, had taken over the little town, and soon, the whole world. It seems when all hope is lost, Mabel has one idea, that could change everything, above and under ground. This, is Breaking thr Barrier, a Sequel to a Gravity Falls/ Undertale Crossover. DISCLAIMER: I DO NOT OWN GRAVITY FALLS OR UNDERTALE. THEY BELONG TO TOBY FOX AND DISNEY. I ONLY OWN MY IDEAS, AND THE IDEAS OF THIS COPY RIGHT. Before reading this book, please read "Underfalls" first. It is the first book in the series, I hope you will enjoy it as well

The tale of how two twins from Gravity Falls, Oregon fall down Mt. Ebbot, and experience what most other humans have never seen before, and now, all three books are in one place! DISCLAIMER: I DO NOT OWN GRAVITY FALLS OR UNDERTALE, ONLY MY IDEAS AND PLOT TO THIS FANFICTION. THANK YOU

This one is about undertale and gravity falls (my two favorite things)

12 year old twins Dipper and Mabel fall into the underground instead of our beloved human kiddo frisk The adventure is a bit different... Nothing belongs to me, except for the art and the book. Undertale belongs to Toby Fox and Gravity Falls belongs to Alex Hirsch.

"Is it just me.. or does it look like there's a path.. and... a cave.. up there?" Dip-stick asks me. "...I see it too." I said. "Race you to the top!" He yelled, and I bolted forward, laughing, I had missed games like these. I beat him, and I was grinning, "Mabel wins! Victory screech! Awooooooo!" "Ah-har-dee-har-har, you're just rubbing in my face the fact that while I beat you in brains you beat me in heart." "And I'm never gonna stop!" "Heheh, I don't expect you to." "Hey, Sir Dippingsauce, what's that?" He looks over to what I'm pointing at, where the floor gives way to a gorge. "Don't fall in.. it... looks pretty deep." I took a photo of him, standing beside the gorge, and put away my camera. "Ha, Do you really think I'm stupid enough to-" I slipped. Of course I slipped. He caught me, before I fell in, but he was... not.. the strongest... in the world. Dipper tried to pull me up, as I clawed my way up with my other hand. "Dipper! Do something!" "I'm trying!" It almost felt like something grabbed my leg. I lost my grip on the ledge, and suddenly We fell in, both tumbling, I reached for his hand, caught it. We hit the ground. ( Fatalist-at-heart, yet strangely funny, Original Sans, along with his sassy, handsome counterpart, Gaster!Sans, cunning and manipulative... yet... strangely confusing...Bill Cipher, Cute and courageous Mabel Pines, with her Smart and Protective brother, Dipper, oh god am I going to toy with your emotions.)

Last summer, Mabel and Dipper Pines vanquished the demon known as Bill Cipher. This summer, they're looking forward to a vacation in their favorite place on earth: Gravity Falls. Meanwhile, Sans is relatively happy. This is the first timeline in which the kid has gone completely pacifist, not gained even one EXP. Of course, he knows they'll likely reset in the end, but hey, he might as well enjoy the peace while it lasts, right? But when a shortcut goes awry and he and Frisk end up in a strange forest on the surface, things take a turn for the worse, and even with their new friends, it doesn't look like they're in for a good time. But hey, this is Gravity Falls! Weird things happen here, all you need is just a little bit of determination... (This is a SIDE PROJECT. Updates are sporadic and may be infrequent!)