Disclaimer: I do not own naruto, any other character used in this fan fiction; the only thing I own is the plot

"Normal speech"

"Toughs and flashbacks"

"Kyuubi or mysterious voices"

"Inner Sakura or????"

"Kyuubi's thoughts"

(AN): authors note.

AN: like many before me (and it 's done so many times that its almost cliché) this is a kingdom hearts crossover, the story starts after what happened in kingdom hearts 2 and when Itachi confronts Sasuke (in this fic he succeeds in removing one of his eyes)

"everything begins with a choice" Morpheus, from the matrix

PROLOGUE

This is the story of a young man and his involvement on a battle that was older than him, of his joys and sorrows that were born before and after he joined the battle, of his struggles and successes. His story begins right the day of his birth.

Konoha, 17 years ago, October tenth:

A tall blond man watched the rampage that the demon created on his wake and sighed softly, a sigh that was full of resignation and sadness. His thoughts leading to the inevitable conclusion, from his point of vigilance in top of, ironically, his face that was carved on the mountain.

"It has come to this" he said softly to no one in particular, and not expecting an answer

"Unfortunately it has" responded a voice next to him.

Minato, who was not expecting an actual answer nearly jumped in fright. only his years as a hardened shinobi prevented him from doing so.

"Damn it Mickey don't do that you scared me!"

"Is not my fault that you're not paying attention" the mouse snapped back.

They stayed in silence for a while both lost in their thoughts before the diminutive king said, "so you're going with it"

"yes it is my duty"

"Are you sure of this I could always try to defeat it," Mickey said while his key blade flashed into existence, at which the yondaime just shook his head slightly

"while I appreciate the offer it is my duty to protect the village, besides whether we want it or not this the only safe way to defeat a bijuu"

"There must be something I can do"

After a moment the blond man nodded and handed the mouse an object wrapped up in black cloth that was not bigger than his hand.

"When my son grows see that he receives it"

"What's this?"

"My legacy my friend, and my will to him"

"Huh?" was the answer to this cryptic message for all his experience and wisdom Mickey couldn't decipher the words Minato said. Making the hokage chuckle in amusement

"Don't worry about it, just see that he gets it okay?" the king of Disney castle only nodded.

"Well it's time to go and face my duties, at least I won't have to do more paperwork" he let out a tense. humorless laugh before leaping from the monument. leaving Mickey to look how his friend went to a certain death in order to fulfill his responsibilities and protect those he cares for.

"It has begun," was the only thing he said before teleporting back to his gummi ship.

Time skip: six years later, radiant garden:

It was a warm, calm night, yet the dreams of a six-year-old girl where nothing but calm and warm, the girl was turning around in her sleep, drenched in sweat.

In her dream she saw a girl several years older than her, fifteen give or take. standing over a giant platform made of stained glass as she watched a battle rage, as she came closer the girl knew that the older girl was her, she didn't know how, but she just knew that was the case.

When she turned to see what the older girl was looking she was terrified on the scene, it was supposed to be a battle. yet it was the most savage one-sided fight she had ever seen, and considering that she had seen the knights of the city practice that was saying a lot.

Three figures were battling at the end of platform. their features impossible to identify as the were shrouded in shadows, and the only thing the could be seen were their hair and their eyes color: the first had spiky brown hair and sapphire blue eyes, the next had long silver hair that touched his shoulders, and the last one had spiky blond hair. the eyes of this one frightened her; they were crimson red with slited pupils. The only thing the three had in common is that they were teenagers and that they were carrying odd shaped blades that resembled keys; the silver haired one and the blue eyed one were panting and barely standing, and maybe even wounded. yet the red eyed one was barely winded.

The blue eyed one was trying to not be overpowered by the one with the red eyes using a weird shaped white key blade, while the silver-haired kid was in the floor several meters away recovering of a particular mean backhanded punch. as soon as he shacked the cobwebs of his head he stood up and ran to assist his friend that was quickly moving closer to the floor.

When the blue eyed one noticed this he put on a burst of strength and manage to put them in a stalemate. now the only thing he had to do was keep it that way until his friend reached him; and as if reading his thoughts the red eyed one shifted to his left suddenly. before somersaulting over his opponent and used the teeth of his blade to latch at his opponent's key blade's teeth bringing it behind the back of his head and keeping in it in that place before delivering a savage mule kick to his back. sending him flying towards his running friend. then he started spinning both the blue eyed and his own key blade like oversized shuriken. throwing them with so much force and speed behind them that the weapons were barely blurs.

The silver haired one was able to dodge his friend and now was eyeing the flying projectiles. he steeled his gaze before ducking over the first an jumping over the next that would have undoubtedly cleaved him in two by the waist, as he was descending his eyes widened. another key blade was coming his way, and in contrast with the first one this was going straight as an arrow and much faster. seeing that dodging was not an option he raised His key blade an parried the projectile making it bounce back spinning rapidly. He was so focused on parrying the weapon that he didn't noticed the red eye's smirk.

The girl saw the red eyed one cut the distance with a burst of speed and catch the flying blade by the handle. before exploding forward again even faster until he was tree meters in front of the other guy, meeting his eyes before saying a phrase that will stay on her mind for a long time, his deep, guttural voice barely a whisper.

"Match storm," the next thing she saw and heard was a blur, and the sound of a blade hitting several times something.

The one with the red eyes appeared behind his opponent, who was still as a statue. for a second everything was calm, the girl was relieved to see that the red eyed one failed the attack. Then seven cuts appeared on the silver haired's body: one on each arm, one on each thigh, two crisscrossing his chest and the final one, a deep, horizontal cut over his stomach.

Unable to take more punishment the silver haired teen toppled forward and fell face first on the floor.

The other teen shouted enraged, and charged with the intention of avenging his fallen friend. the other one simply smirked before calling the first key blade he launched and used it along with the one in his other hand to parry the attack that was meant to split him in half, then raising his foot he kicked his opponent in the stomach making him loose his air and topple the upper half of his body forward, before receiving a vicious left punch that was enhanced by the hilt of the blade in his hand, the brown haired one toppled backwards. His vision blurring before his feet were swept under him; he raised his gaze to see his opponent crossing his blades.

The blades fell. the girl woke up screaming in terror making her parents rush to her room to see what happened.

As she was comforted by her parents, Kairi hoped it was nothing but a bad dream.

Time skip, ten years later, konoha village:

The sun rose over Konoha, its light shining down over all of the populace. It was due to this light that brought Naruto out of unconsciousness, he yawned and summoned one of his key blades. fixing his gaze in the weapon, thinking what his life has become since he took these blades.

The first one he remembers it as clearly as if was yesterday: it was the same night after he defeated Mizuki. at that time he thought it was a dream since clearly remembered going to bed. he was standing over a platform of stained glass that had his pictured in it, lazily seated. in front of him three pedestals with a sword, a shield, and a staff; at that time he was young and naïve, untainted by the cruel and harsh reality of the life as a ninja. he thought that power was the way to go so he chose the sword and the staff, leaving the shield behind. Then at the end of his test he was in a sewer. he saw how a red miasma was trying to creep his way towards him, in a panic attack he did the only thing he could he stabbed the blade in the way of the miasma and bolted.

He didn't see or hear from the key blade or the mysterious voice for a long time.

The next one appeared when he was in the middle of his training with the pervert. after he went to sleep he appeared again on the platform, and again in front of him appeared the sword, the shield and the staff. But this time around Naruto was not as naïve as he used to be, he had seen the reality of the shinobi life, and he had found his true purpose: to be a protector of those precious to him. As such he chose the shield and the staff and let go of the sword after all. what good being powerful is, if can't protect the ones you care for? And besides one of the first things it was drilled in his head it was that knowledge is power. when he started to leave a voice spoke up. and being familiar with the speech he tuned it out until he heard a new line.

(AN: for the speech please refer to your kingdom hearts videogame or related fanfic of your preference)

"the rewards of the path you chose are very few and the hardships many, but don't falter in your resolve, farewell twilight warrior"

this time he asked his sensei, Jiraiya, to teach him kenjutsu. the pervert, who only knew so much about the subject taught him everything he was able to, which were barely the basics.

The blond adapted at using two swords, but he never touched the blades for anything more than to kill the random shadow that appeared every now and then. aside from that he neglected them.

Not until he saw Sasuke, the guy he considered a brother. get his right eye ripped out of him by the Uchiha's older brother, Itachi. he let go of his fears and insecurities, his key blades flashed into existence as he leaped with a battle cry towards Itachi. as Sasuke was hitting the floor using his left hand to cover his now empty right eye socket. That day Naruto managed to drive Itachi away because his exhaustion of the previous battle and mange to fulfill his promise, Sasuke was returning to konoha.

Then why he wasn't happy? the reason was that Sakura. the girl he loved, the one that made him promise to return Sasuke to konoha, the one that he wants to protect with every fiber of his being and made him reach beyond his limits for her. chose someone else, his supposed brother, Uchiha Sasuke, and every day he saw them was tearing apart little by little in the inside.

Unable to handle it he avoided his old team like the plague, as it was just too much for him and started taking training a lot more seriously. as to fill the void his deceased sensei left as gama senin (toad sage), he trained on his own in all the shinobi arts, taijutsu, ninjutsu, genjutsu, kenjutsu, fuuinjutsu (sealing methods). his speed and strength increased dramatically. when he needed help he asked the best of their respective areas. They startled asked in return why he didn't ask Kakashi for help, and he always answered the same thing:

"he always said that Sasuke was just like him, now he is right. let the so called geniuses train on their own, I won't grown dependant of someone," they all saw he was hurting and they let it slide.

A year had passed since then and he became chunnin, he haven't taken the exam for jounin due to the lack of team. his desire to show the world how serious he was that he changed his wardrobe: now he wore a pair of black shinobi sandals, black shinobi pants ( like the ones the chunnin or jounin wear) a short-sleeved dark orange shirt that had a collar that reached below his Adam's apple, the shirt had a zipper that started in the middle of his chest, over his solar plexus and ran the length of the shirt. however he left it half way up showing the world his beloved necklace. on top of it an unzipped hooded black jacket that he wore with the sleeves rolled above his elbows. his forearms were bandaged from below his elbows, to the back of his hands, to the first phalange of his fingers with black bandages (AN: like Lee but instead of white bandages black ones) the ever present red swirl on his back and the white swirl on his right bicep. two weapon pouches on his lower back. a kunai holster in his right thigh, and on his left thigh a bigger wider rectangular pouch that was secured by a pair of loose straps, one to the leg and the other to his right hip.

(AN: like the pouches Sora uses in Kh 2 )

"anther day of avoiding my old team and training" he thought a little bitterly. then again, it was probably all the crap of his life finally getting to him. he had this feeling that told him that his life was about to become more complicated.

he didn't know how right he was.

Sometime later as he was finishing his training for the day an ANBU appeared in front of him and told him he was summoned to the tower, he grimaced. the last time he was summoned to the tower Tsunade tried to make him go back to team seven, even though she knew the reason behind his drifting, with disastrous results, he still haven't fully forgiven her for it.

As he was about to open the knock on the door he heard shouting from two voices. the first one was none other than Tsunade, but the other one was new it sounded…squeaky maybe?

"NOT A CHANCE IN HELL!!" shouted the hokage enraged while hitting with her fist the desk making it groan due to force used, Mickey however was not intimidated.

"he is needed Tsunade and you can't decide for him"

"YOU ACTUALLY EXPECT ME TO JUST LET HIM LEAVE LIKE THIS!!!"

"then what do you think we should do, let them destroy the worlds? And just because yours far away Tsunade don't think they won't reach your world"

"I never said that, but you must understand he can't go around like that"

"it was his destiny from the moment he took the key blades"

"there has to be another way" the Godaime pleaded, his surrogate brother had one too many brushes with death for her liking.

now the diminutive king was starting to loose patience "there is not another way Tsunade either he fights along with the rest and give and improve our chances or he stays here and waits for the inevitable, it's as simple as that" the what could happen if Mickey and his group failed in their quest was not said, as it was not a pleasant thought.

In that moment Naruto entered the chamber " did you summoned me hokage-sama?"

"yes Naruto, I have a request for a solo mission and the client asked for you"

"what's the catch?"

"the catch is that you will not be returning to the village in a long time, months. years even"

Naruto stood there thinking for a moment, the mission sounded important , the con side of it was that he wouldn't see anyone he knew for a long time, including his team.

Tsunade watched the emotions in the blonde's face feeling smug, because this was a solo mission Naruto was well in his rights to reject it. and she knew he would, as the love for this village and the passion for his dream was just too great. as Naruto was about to open his mouth, she couldn't help but smile at the thought of finally defeating the mouse at something.

"looks like I won Mickey, better luck next time" she thought smugly

"I accept the mission"

"what?" asked the busty woman disbelievingly.

"I, Uzumaki Naruto, chunnin accept the solo mission"

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AN: finally, stupid writer's block that keeps me from updating, anyways this was something I wanted to write for a long time, only recently the manga gave the missing part ( Sasuke had a regular eye implanted in him in this story) now for power levels Naruto is faster, stronger, slightly better swordsman and tougher than Sora or Riku, however, the two are more experienced in both fighting heartless and using the key blades to their fullest, can use drive forms and have magic (Naruto only has jutsus at the moment) so they're pretty much even. As for the pairings I really don't know (no one older than him though) so I'll think of that in the mean time (feel free to give suggestions, even Sakura has a shot in this fic, no harem) as for the key blades(everything will be explained as the story progresses):

-they will have one of these tree alignments: light, darkness or neutral (this is kind of important)

- they can evolved (again explained later)

now for the ninja his title will have both good and bad things, some familiar and some not.

Well that's it for now please review flames are not accepted but constructive criticism is.

JA NE.