(A/N: I do not own any of the peoples places or items in this story. Only the idea and basic story are mine. Dragon ball belongs to Akira Toriyama, Undertale belongs to Toby Fox. If I add an OC I will let you know.)
(UT)Pain. That's what sans was feeling. Ever since the battle he was feeling pain. Not physical pain not at first, but psychological pain. If he had just acted sooner his friends, his family would still be alive, Papyrus would still be alive. But that's in the past, now he was fighting for his own life. The child, no the demon was closing in. Another dodge, and another attack, he just kept up the show, he couldn't let that thing see how tired he was. "I can't keep this up much longer." He thought to himself "I've got to end it, and fast." Seeing an opening he took it, blasting that murderer with enough power to take out half of waterfall. "It's over" he mumbled, but it wasn't. Leaping out of the dust was what looked like a demon. Their body was an inky black, and their eyes a fiery red with their soul glowing brightly. Down almost all his magic and out of ideas Sans tried to fight back, but it was no use.
(DB)Pain coursed throughout Goku's body as he hit the ground, reverting back to his base form. "Come on Whis let's go, I hope the Saiyans on earth are more promising than this one." Beerus stated matter-of-factly. "Of course my lord" the being known as Whis replied, and they blasted off to earth. After eating a senzu bean, Goku's mind started racing about how to get stronger in such a short amount of time. "Maybe the time chamber, or I could fuse with Vegeta, but even then I don't think we could win, I can't even fathom how much power he must have." Goku mumbled worriedly."Speaking of, I've called Vegeta, and told him the situation, if he can keep everyone under control maybe we can survive this." King Kai explained, "just don't screw it up!" But as he was saying those words goku quickly instant transmissioned away, with a big goofy grin plastered on that stupid face of his.
(UT)Stumbling to the throne room, bloodied, beaten, and bruised Sans stalked up to the throne room to confront the demon child, who was shattering the human souls over a pile of dust completely oblivious to his presence, one more time. A few souls in, Flowey jumped in grabbing a soul and ripping it out of the jar it was in. "I'm tired of screwing around with you!" He screamed, transforming into an unholy beast that looked like it came from hell itself. Fangs five inches long, claws a foot long, and petal patches all over his body. "fun" replied the demon while shattering another one of the souls with an obvious undertone. Acting quickly Sans grabbed the two remaining human souls, absorbing them, and immediately transformed into a being with power beyond the confines of his previous imagination.
(DB)The group lowered their hands from Goku's back. As he rose into the air a blinding crimson light replaced the bright golden glow previously floating through the air. The clouds glowing with the energy of the Saiyans swirled around spiraling around the boat and into the sky past the atmosphere. The sky dark and dotted with stars, at noon. Goku flying up and into the sky, a fiery aura surrounding him. Suddenly him ki signature disappeared out of nowhere and he slowly floated down. "Did it work!?" Trunks asked, a mixture of fear and excitement on his face. "I don't know." Goten replied, worried about his father. "It looks like dad's going to come down." Gohan observed as Goku descended. "He looks the same as before?" Bulma said in dismay. "Not quite, look at his hair. Its red!" ChiChi added "And it looks like he dropped a few pounds." Roshi somehow slurred out. "I can't sense him energy, at all." Krillin said worriedly. "That is divine energy you lowly mortal." Berus said smiling. "Lets see what you can do Super Saiyan God."
And so, the tale of heroes begins what will happen next? Tune in next time for the exiting continuation of this riveting story