If there truly are as many worlds as there are stars in the sky. Then what if the keyblade and Ansem chose two other then Sora and Riku to approach and give power to. What if the keyblade came to Naruto and Ansem came to Sasuke. Rather then traveling around various Disney worlds or team up with various Disney characters, instead Naruto travels through various worlds of other Shonen Jump titles. Titles like Bleach, Dragonball, One Piece, and others.
Within the forest that surrounded the Hidden Village of Kohona and stretched out seemingly for miles in every direction. Kohona's Number One Ninja at Surprising People, Naruto Uzumaki was speeding through the treetops trying to catch up with his teammate that had been lured away from the village by strange man.
Flashback to two days earlier….
Naruto was just wonder the village as he could not sleep because there was something on his mind in regards to Sasuke. He had been acting differently lately almost like how he was when the first became a team. If he had to guess it probably all started while they were in the Forest of Death since up until that point the was changing little by little from the person he was before Team Seven was form. He knew that Sakura and Kakashi-sensei told him that everything with Sasuke was fine but he was not so sure. It was this nagging feeling that was keeping him up at night after coming back from mission to the Land of Tea.
Just walking around aimlessly though he noticed Sakura in the distance heading towards the village's exit. When he caught up to her though what he saw however made his blood boil. For there was Sasuke standing next to man in cloak who had their hand in Sakura's chest.
"That strange. She is not disappearing?" the cloaked man said as they removed their hand and Sakura just stood there with vacant expression on her face.
"Come on let go. I want this power you are offering that suppose to surpass Orochimaru's" Sasuke said.
"Well then head to the location we discuss before we were interrupted by 'this' here" the man said referring to Sakura as 'thing' rather then a person for some reason.
Of course after seeing what just happened Naruto was not going to stand around as charge forward demanding to know what the cloak man did to Sakura and why Sasuke was leaving with him.
Though without even move from his spot the cloak man unleashed a wave of what Naruto guess was this Darkness he heard of as it did not feel like charka of any kind not even demonic kind which Naruto himself was able to use because of Kyubi being sealed inside him.
Slamming up against a wall, Naruto found himself unable to move though the anger over what this cloak person had done to Sakura and him managed to get Sasuke to follow him somehow was enough to tap into Kyubi's charka.
"Interesting development so the rumor were true after all. However you pose no threat to me or my plan in your current state" the cloaked man said.
Wanting to get Sakura some help as fast as possible. She did not seem to have any bodily injuries despite having someone's hand shoved into and then pulled of her chest. However she had not moved an inch since then though.
Using what become one of signature techniques over the past year, the Kage Bushin, the cloaked man was surround by a dozen or so Narutos each with only one thought on their mind. Beat the crap out this guy as fast as possible then take Sakura-chan to Tsunade.
"Vanish!" the man said with wave of his arm all the shadow clones vanished into a puff of smoke
Though when smoke started to dissipate the real Naruto appeared with Rasengan in one hand. However both Sasuke and Naruto were shocked when the attack hit the man dead in the stomach yet seem to have no effect at all.
"Pitiful! I expect more from the vessel of Kyubi but if this all you got then I am disappointed" the cloaked man stated once again unleashed a wave of Darkness at Naruto this one three times strong then before knocking him out as when hit the wall where he left three inch deep crater with force of his body being slammed into it.
Although it did not seem to have no effect at first just like Kabuto after he took Naruto's first complete Rasengan. The effect was delayed as the cloaked man became dizzy and almost fell to one knee before catching himself.
"I guess I was wrong after all. You do have some power after all but soon it be pointless as you still can not stand against me neither one of you" the cloak man said.
He then turned to Sasuke who now eagerly wanted this power as with it he was sure that he could finally kill his brother and full fill his role as an avenger.
"Meet me at the designated place and you will being taking the first step towards obtain the true power of Darkness and not that feeble dark power offer up by that petty seal on your neck" he told young Uchiha
During all of this Sakura just stood straight ahead at nothing with vacant expression ever present on her face. While Naruto was unconscious on the ground having beaten by so called true power of Darkness the cloaked man possessed.
The following day….
Naruto shot up after being splashed with ice cold water to see himself surrounded by Tsunade, Jiraiya, and Kakashi-sensei.
"Huh? What going on here? Why are you all here and….where Sasuke and that cloaked man!" Naruto demand as he did not see either one of them here in what appear to be the Hokage's Office.
"That what we would like to know as you lucky that it was Hinata that found the two of you first. If one of the villagers had found the two of you before her. I could only guess what kind of problems that would raise from those among the village that still have negative view of you, Naruto" Tsunade said.
"Hinata-chan found us? Where Sakura-chan right now!" Naruto asked worried.
"Look to your left" Jiraiya told him.
Doing so the blond genin's blue eyes came face to face with lifeless green one of Sakura who sitting next to him.
"AHHHHH!" Naruto yelled as he was expecting her to be that close while the lifeless stare also freaked him out too.
"She been like this since we found the both of you. She does not respond to anything we say and refuses to leave your side" Kakashi said as in all his years and all the Justus that he encounter over them, he never seen something like this before.
"That cloaked man did this to her. Sasuke was leaving with that strange guy and Sakura tried to stop him. The man stuck his hand in Sakura's chest like it was open cookie jar or something. When he pulled it out he shocked she still there. Almost like something was suppose to happen but did not as instead she became like this" Naruto told them.
"Well as strange as this is going to sound after checking her multiple time I discover that Sakura's heart is missing. Despite all the test I have run and re-run on Sakura. All of them have come the same result. Her heart just is not there anymore somehow however despite being heart less, her body is still functioning normal. Her mind however that different story as it does not seem all there at the moment. The only time she reacts to anything seem to be when it has something to do with you" Tsunade told him.
Shortly after this Naruto, Shikamaru, Neji, Kiba, and Choji were sent out to go recover Sasuke who reported heading towards the Valley of End. While a small ANBU team was send out to find this cloaked man as whatever he had done to Sakura. The effect could mostly likely only be reversed by getting the knowledge from that man if that was even possible.
End Flashback
Thus leading up to right now were Naruto had just left bushy-brow, Rock Lee, to fight this guy that used his bone as weapons. With Rock Lee taking on the bone guy, Naruto was free to chance after Sasuke as the last of Orochimaru's men had been taken care of leaving the path towards Sasuke free. The Snake Sanin had somehow managed to learn of someone beating him to the punch at getting Sasuke. So the leader of Otogakure(also known as the Sound Village) send the four ninjas to take Sasuke by force and bring him to Sound Village. These were the same four ninjas that made that barrier preventing anyone from getting in the way of his fight with the Third Hokage. One by one Kohona's and Otogakure's group were wilted away until only Naruto remained able to chase after Sasuke.
Naruto after non stop running for nearly ten minute he was now within fifty yard of Sasuke as he could see the Uchiha's back far in the distance by before he could get any closer he was blindside and tumbled onto the ground. His attacker this time was this strange shadow thing about the size of small kid that just seemingly melt into the ground and then reappeared somewhere else.
'Just one of them should not be a problem' Naruto thought
Though the problem soon became that it was not just one but a dozen of these creatures. The numbers did not stop there as they just kept growing as they just kept popping up out the ground attacking him without end or mercy. Despite their small size, these creatures were tough then anyone kid he ever met in his life, as not even Gaara was able to take the beating that he dished out on them without get a single starch on him.
Just when he was all out of options everything went white and the next thing the scenery changed in flash and he was face to face with another shadow creature only this one was about the half the size of Gambunata. If he had trouble with small ones there was no way he that was going to be able to stop a large but that would not kept him from trying. Decide to fight fire with fire, Naruto tried to summon the boss toad on to discover that the summoning did not at all as he could not summon Gamakichi or even a tadpole for that matter.
Shocked at being unable to summon, Naruto was almost unable to block a strike from the giant heartless. Raising his kunai in defense manner on instinct as he really did not think a kunai could block a giant's fist. Yet as metal met fist something he did not expect happened as the kunai he was holding was replaced by some strange key that was shaped like a sword. The creature before him seem to somewhat weary of this strange weapon as it back off then struck the ground from which small version of it came out a dark portal. His theory that this strange weapon might be useful against them was proven corrected when he slashed at small creature that attacked him and watch them vanish.
After long fight he managed to beat the both the small and large shadow creatures with the key which he used like sword. Though since he never used a sword before he was not that familiar with how actually use it but he was getting by okay. To make up for his poor swordplay he just decide to throw it around like kunai or shrunken as he felt that he could do that for some reason. Not only did it work but he did not have to go after it as he found out all he had to do was think it return to his hand and it would happen. Things then went white once Naruto found their were no enemies to fight. Just both he lost consciousness he wonder and hope that everyone back in Kohona as those friends he left behind were ok and that these shadow creatures did not attack them as well.