DISCLAIMER : I do not own Undertale and/or Naruto.

"Speech"

'thoughts'

"Demon/Biju/Chara speaking"

Summary: An overpowered attack by the Judge Sans the Skeleton and Frisk possessed by Chara opens a portal to another world, unfortunately for them, they fall on top of the Kyuubi no Kitsune the Ninth Biju. Later, a five years old Naruto is brought into the seal by the Kyuubi. Frisk and Sans help him use the power he gets from them, weirdly enough, Chara does too, she did learn fire magic from Toriel when alive, that and she gave him her True Knife and the Heart-shaped locket.

Chapter 1: A Seal, A SOUL and Magic

"you really like to swing that thing around, huh." An exhausted skeleton monster tells the possessed human. The resets have been going for what feels like centuries for the skeleton and he noticed changes in the human, they were getting tired of the resets too, like they could do nothing about it. He also noted changes between pacifist and genocide timelines, during the latter, their eyes were a chilling scarlet. O the contrary, they are a heart-warming and lovely chocolate brown during pacifist timelines. The skeleton concluded that the human was being controlled during the Genocides and he grew to miss his human friend, the pacifist one.

"i'm really getting tired of this, kid. So i'm going to do one last attack and whether you survive it or not, i'll die soon afterwards." Said the normally funny skeleton, the genocidal kid showing the first hint at emotion right then and there: surprise, because it was something new.

"So, you're finally becoming desperate?" answered the chil- no, demon. "I was getting bored, you know? So, I'm going to do the same. I'm seriously getting tired, but before any of this, I'll tell you why the resets continue." Finished the possessor of the body, surprising the skeleton who could tell if it was a lie, which it wasn't.

"go on, i'll listen, but don't think i won't still kill you afterwards." Answered Sans.

"Good, I'll start by telling you my name, I'm Chara. When I was still alive, I was known as Chara Dreemur because I was adopted by the King and Queen of Monsters. I hate humans. Frisk, the child whose body I'm controlling is a peace-loving fool but is DETERMINED from D to D. I was first awoken as a ghost in the ruins when Frisk first fell. When we arrived at the end without killing everyone and we were on the Surface. The timeline was forcibly reset. We once even destroyed the button that permits us to reset but everything was still reset. And so we started killing, thinking that with more power we could make it so there wouldn't be any reset anymore. But as you saw and as I'm aware, power corrupts and absolute power-" "corrupts absolutely." Finished Sans, completely gobsmacked by what was revealed, feeling somewhat rested after the lengthy explanation.

"that's all well and good bub, but you're not just destroying timelines and worlds, you're corrupting the rest. you could've just stayed with us in snowdin and alphys could've helped with your lack of body. but now it's too late for excuses and what-ifs, we're going to end this aren't we?" asked the tired skeleton "after all, i've got a skele-ton of people to meet in the afterlife." Chara groaned, but a weirdly sad smile was on Frisk's face.

"Frisk is still in her mind, you know? She's listening and is crying. Her soul won't last long." The last words were said under her breath, but Sans heard it and his ever-present grin turned into a sad one.

"let's finish this, and please don't act out of character." His smile widened a bit but remained sad at Chara's groan. With All the magic he had left, Sans created the most powerful of his Gaster Blasters. Chara's True Knife glowed an intense red, flames surrounding it as she started to run to Sans' position. Her slash sent a powerful crescent-shaped red energy blast as the blaster fired. When the attacks collided, a blinding light exploded from the point of impact and everything vanished.

(In Konohagakure no Sato at the end of the Nine-Tails' attack)

A blinding flash of light emitted from above the restrained Kyuubi no Kitsune while Namikaze Minato was sealing him into his newborn son, Minato and his wife Kushina were both impaled by the Kyuubi's claw when it tried to kill Naruto. Unseen by all but the Shinigami, two beings, a child and a skeleton landed on the Kyuubi's back and were sealed with him.

(In the seal just after the sealing)

"well, we're boned" said a certain skeleton

"Would you please stop with the puns. Where are we anyway?" complained a human child.

"i think we are in another reality." A period of silence passed before "What."

"well you already had the energy to rip a hole in the space-time continuum, plus the power of my last gaster blaster and frisk's power of reset probably created a portal to another reality" answered Sans "that and I think we were sealed in the newborn that was on the altar, along with the orange furball." Said furball was knocked asleep by the seal.

"I don't think that's all, Comedian. I can feel my power draining and replenishing at the same rate, the seal probably puts a part of our power in the kid's body. Meaning he'll have our magic, soul magic the reset and whatever energy I can feel in those human's body." Chara continued.

"then I think we should bide our time, when the time comes, I'll teach him how to use my powers, you should do the same, kid." Concluded Sans.

"Whatever, I'm going to give back control to Frisk. She'll be able to tech him soul magic and about reset. I'll probably teach him fire magic and how to handle my True Knife." Finished Chara, a sadistical smile on her face. The body's eyes suddenly changed colors from scarlet to chocolate brown and the sadistic smile became gentle.

(Outside the seal)

Naruto's hair gained brown and white streaks while his blue eyes gained blue, yellow and red flecks.