Kill or be killed a philosophy that has controlled his life, now in a world at peace, what will a monster do? Rating changed to be on the safe side. (swearing)

After thousands of Eons one of the 3 legendary dragons that created the Mega Dimensions chooses a human named Alastair while he is fighting for the outcome of the battle for the Underground and becomes the next god of all gods. 6 years later Alastair goes to another world with Sans and Asriel to help the group from RWBY in there Grimm crises. There will be lemons in the future.

At the end of the Genocide route, Sans dies. Something changed along the way, a white hooded woman strikes a deal with Sans that'll set him free from the Resets. (Disclaimer! I don't own anything here. UNDERTALE belongs to toby fox while RWBY belongs to Rooster teeth and Toby Fox!)

Sans, tired of a world where even death isn't a reliable escape, waits aimlessly for the world to go through another scripted cycle. But as the world replays itself once again, he finds something that shouldn't be there. What Sans finds is a way out. I do not own Undertale or RWBY.

Sans has been killed by Frisk/Chara over and over again in many other timelines, But then a White Light appears and Sans was greeted by the Great Monty Oum, (R.I.P Dude!) Oum gives Sans a Second Chance into the world of Remnant, How would our favorite Lazy Bones going to do in Remnant?

Sans has been killed by Chara once again, except this time when he wakes up he's no longer in the underground. He's in a new world that seems entirely different. A world full of people he has never seen before. What adventure awaits him? What will happen as he travels? And will he make it out alive?

Ruby falls in the underground, yada yada... I don't own either franchise. There is a slight amount of swearing so I'll make it a T rating. By the way, I got Ruby's age wrong. I put her as fifteen instead of sixteen. it was an honest mistake.

Two heroes, one young and one older than can be imagined, must work together to defeat the two villains, who threaten to destroy their worlds. Jaune must harness the power of the bone zone and defend the ones he loves from the one who will turn this world into dust and cinder. I don't own either RWBY or Undertale. (Gore and mild cursing.) Please review! Thanks!

Just some Undertale parodies of RWBY songs. I will take requests if you want them. I forgot a disclaimer though so I'll put it here: I don't own Undertale or RWBY. Respective franchises belong to Toby Fox and Rooster Teeth

Papyrus died in a genocide run, but this time his soul left the underground, left the timeline, Left that dimension. Reincarnated into remnant with a new body and name, he now had a human soul he was born with, fused with his monster soul. With no recollection of his past life but still retaining his magick, watch as he, Jaune, tries to become a hero to gain the adoration of all.

Sans was tired of the resets and decided to do something about it, but unfortunately things don't go the way he planned. After absorbing nine human souls, killing his friends and family, fusing with Gaster and trying to reset the timeline and failing(badly) he decides to explore this new world he's ended up on while trying his best to care about life and make friends along the way.

A random human gets dumped into a strange version of the game known as Undertale. Welcome to the world of Monsters and Men where the seas are a 100 meters higher and great beast rule the land, sea, and sky. Where the code of the world has changed so drastically that worlds so different from the other have now been set onto a collision course.

In a battle of puns and rhymes, Yang and Sans finally go head to head. one-shot

W.D. Gaster was a parent stripped away too soon. So was Summer Rose. Now, stuck in Limbo for many years, Summer appears along with him. Reality is only a concept to him, and escape is goal number one. Actually, that's not true. Goal number one? Make a friend/ally and then escape. Sounds hard, but it only takes time, luckily for both, Summer and Gaster, that doesn't matter.

Ruby has honed her silver eyes into lethal weapons, but the massive power surge throughout her body makes her too weak to fight, when suddenly she is snatched up and taken to a new world and tortured. Can ruby survive long enough to be saved...

What happens when you make RWBY Chibi version of my Undertale X RWBY crossover fic "Resurrected Roses and Reignited Flames". Rated T for Qrow being drunk and light swearing. Will be updated passively.

Epic!Frisk, Reaper!Chara, Betty et Player se rencontrent sous les contraintes d'un homme qu'elles n'arrivent pas à atteindre, il les envoya dans le monde de Remnant, où elles devront tenter d'aider les humains, l'espèce qu'elles déteste le plus. Possible yuri. fem!Frisk & fem!Chara.

Humans and Faunus are not the only beings on the planet. They've forgotten about the third race... Now Jaune Arc (Hero of Monsters) has Reset...to prevent tragedy...and SAVE the WORLD... To Preserve HOPES and DREAMS, he must face insurmountable odds... But he is not alone...

In a recon mission Blake falls on the underground where flowey reing supreme and now must helo the remaining monsters stop him,can she succeed?

What if during the fall of Beacon, Ruby and Yang fell and were given a second chance. They were restored in the Underground and now only have one week to change their fates alongside the fates of millions. Join them in their quest to save the world they once called home and their past selves from themselves. Spoilers for RWBY Volume 3 and Undertale. (OP Yang, OP Ruby, & OP Summer)

Death was not the end for a certain skeleton comedian. When sans gets sent to the world of remnant, he will make new friends, new enemies, and new bad jokes. Warning: Undertale Genocide and RWBY spoilers! You have been warned. Also, I only own OC's, nothing else. T because I'm scared.

4 characters of different realms go to the RWBYverse to mess up the story but for the good! OCs, Characters and references mine. I do not own undertale, Paragon nor RWBY, Sadly. Rated M for security... And major cases of violence.

I should have know I couldn't run from my past, why'd I even bother. I guess on the bright side I'm using this power to protect rather then just to mindlessly kill, not that it changes the fact I'm nothing but a Demon. Rated M just to be safe. Cover art done by mysterywhiteflame on deviantart

What would happen if we get the Undertake crew and the RWBY crew watch the future. I have no idea, by it seem fun. So sit back and watch them enjoy the future. They will learn the road Jaune will travel with San power. OP!Jaune, JaunexMassiveHarem Slash warning. Fatherly!San Rated T for reasons.

Frisk, a test subject of Sans and Gaster, was sent through the timeline for an understanding of said timeline, to see if she with her determination can save the underground. However after things go wrong. Frisk, Chara, Sans, and Asriel are sent to another world to retrieve a soul like Frisk's. However if they want the said soul, they have to play a new game. More Details Inside.