A/N: You count the medals, 1, 2, and 3! Life goes on! Anything goes, coming up, OOO! That's right, NarutoxKamen Rider OOO :D OOO is my favorite Kamen Rider, right up there with Kabuto, and I've read some good fics where Naruto has the OOO Driver (and/or the Birth Driver) and I decided to do my own. But this will have a twist; I'm sure no one has tried a Dark NarutOOO (see what I did there?), or trying to make some original medals. If they have, darn you, you creative fucks :D But anyway, this Naruto will seek out, kill, and make medals of the Bijuu, which will include the canon, and mythological-accurate demons! Yeah, bet no one's tried that! And these 'bijuu medals' will be interchangeable with the three slots of the OOO Driver; bet no one's tried that either! You guys sensing a pattern that I'm trying to make my stories original in any way, shape, or form?

Disclaimer: I do not own Naruto or Kamen Rider

"Hey"- Human/Rider speech

'Hey'- Human/Rider thought

"Hey"- Jutsu/Demon/Driver/Greeed speech

'Hey'- Demon thought

Let's begin.

Naruto was sailing through the Forest of Death, his body numb and the seal on his stomach burning from whatever-the-hell that snake-pedo did to him. Something called Gogyo Fuin; whatever it was, his stomach burned, and he couldn't use his chakra at all.

Naruto burst through a weak wall in an abandoned shed, tumbling on the ground until he hit another wall, some weird belt buckle falling on his waist. It, and the seal on his stomach, glowed a blood red, as Naruto's eyes snapped open, and he screamed to the heavens in pure pain, his mind flooded with the mad ravings of his tenant, the Kyuubi no Kitsune, as it seemed to be dying, or converted into something.

Naruto passed out from the pain of it all, and appeared in his mindscape, however the bars were devoid of any life behind them, or the oppressive hatred of the Kyuubi. Naruto looked around, hoping the Kyuubi wasn't released, only to find a teenage boy waving to him, which just seemed odd since, assuming this was the Kyuubi's human form, he didn't expect it to be a teenager. "Kyuubi?" Naruto questioned the boy.

The teen shook his head and stopped waving. "No, my name is Hino Eiji, and you are my successor to the OOO Driver." The supposed Eiji explained.

Naruto raised his right eyebrow. "OOO Driver? Successor? What're you talking about?" He asked.

Eiji sighed and chairs formed behind them both, Naruto jumping when he felt the chair slide forward into the back of his knees, forcing him to sit in it. Eiji began to explain his adventures as Kamen Rider OOO, a hero who fought against evil entities known as Greeed, with the power of the OOO Driver and the Core Medals that allowed him to take numerous forms.

By the end of his story, Naruto's eyes were wide as he realized he was given all this power. But he stopped; 'given.' There had to be a catch.

"You are correct; there is a catch." Eiji answered his silent question.

Naruto raised his brow at how he seemed to read his mind.

"We're in your mind; your thoughts go off like an intercom in here." Eiji explained.

Naruto blushed, thankful he didn't think of… other things. "So what's the catch?" He asked, trying to deviate the conversation from his embarrassment.

"You have to survive the process as the OOO Driver turns Kyuubi into a HardCore Medal." Eiji explained.

Naruto raised his brow again; he seemed to be doing that a lot lately. "HardCore? You never mentioned that in the story." Naruto pointed out.

"A HardCore Medal is a special medal that can be switched between the three slots in the OOO Driver, or can be used by itself and still attain a full form." Eiji explained.

"Cool. Why does Kyuubi turn into that?" Naruto asked.

"Because of his sheer power; if you go out and find the other bijuu and beat them, you can turn them into HardCore Medals, too. You will get the power of each bijuu or demon you find." Eiji explained, as dark whispers bled into Naruto's mind.

Ignoring them for now, Naruto smiled his foxy grin. "Cool! Wait, what do you mean survive the process?" Naruto asked.

"Why do you think you're in here? The beginning of the process caused you so much pain, you blacked out, and here you are." Eiji explained with a wave of his arms towards the darkness of Naruto's mindscape.

"Oh." Naruto deadpanned. "Well, bye then. I guess I'll wake up to go through the pain; I'm determined to survive this. That's the promise of a lifetime, dattebayo!" Naruto yelled determinedly as he smiled his foxy grin, fading from his mindscape.

Eiji chuckled at him and waved until he left. When Naruto fully disappeared, Eiji's smile and waving arm fell, as he slowly morphed into his Greeed form, a twisted transformation from his PutoTyrannosaurus form after he absorbed the final Purple Medals. Contrary to belief, that day Eiji became a Greeed, he stayed a Greeed, and he continued his life as one. He destroyed the final enemy with his power as a Greeed, and secretly killed dozens through their desires after his adventures.

His next victim: Uzumaki Naruto.

(Waking world)

Naruto groaned as he slowly sat up, then winced as the familiar burning sent another wave of pain through his body, and he held his stomach, gritting his teeth. 'He could have mentioned it would keep hurting like this after the initial pain.' Naruto mentally complained.

He toughened through the process until it was finished an hour later, and he was on his hands and knees, panting heavily, sweat dripping down his face as he finally started to catch his breath.

Over the hour wait, his body went through many changes, chief of which being his favorite: he grew in height! Before, he was a hilariously short 4' 3", now he was almost six feet tall!

With his new height came a torn jumpsuit. It was way too small for his body now, and he had to remedy that. Thankfully, his boxers were okay; that would have been embarrassing. Looking around the old shed for some clothing, Naruto found a black muscle shirt and baggy shorts. Shrugging his shoulders, deciding it was better than nothing, Naruto seized them and put them on; they fit perfectly. Noticing the OOO Driver shrank to a normal-sized belt buckle on his pants, and the scanner became a seal on his palm, Naruto smirked and jumped out the hole his crash created in the shed, a weight lifted off his shoulders with the disappearance of the Kyuubi forever. He vaguely hoped he would run into trouble, just so he could use the Kyuubi form he got from its HardCore Medal.

And Kami says yes, because a huge snake appeared and seemed intent on making him a snack. Smirking at the prospect of a fight, Naruto held his seal-bearing hand over the shrunken OOO Driver until a Ting! went off. One large blood-red ring appeared in front of him.

"Kurama! HARD! CORE!"

With the voice from the Driver done, Naruto's transformation began. He was consumed in a burst of fire as the circle launched at him, specifically his chest to form the O Lung.

Naruto wore a black bodysuit of armor, as the image of the Kyuubi appeared on the Lung, divided into three parts; the first part its smirking grin, the second its claws about to grab some black orb, the last its legs, sitting on its haunches, and its nine tails. For his helmet, two large crimson compound eyes appeared, surrounded by orange armor, its toothy grin forming a stylized pattern under it where Naruto's mouth would be, as black streaks lead from his eyes down the fox ears that swept back. For the Arms forms, dark orange trim formed on his shoulders and down his arms, into his gauntlets. Dark-orange, almost red, cylindrical gauntlets leading to armored clawed fingers, a glowing 'vein' forming down the gauntlet and hand and down each finger. For his legs, dark orange armor formed from the knees down, leading to clawed toes on an armored foot, another vein down the legs. He actually wore a skirt of the same color behind him, divided into nine segments.

He roared to the sky as he attained his new form, the common sense in the snake's mind telling it to run away from the demonically oppressive force exploding from the boy, but its orders from its master overrode that, and it lunged at the human.

Naruto stopped its rush with a lift of his hand, grabbing its maw and slamming it shut. "Did you really think that would work?" Naruto asked, smirking under his helmet. Willing his power over the Kyuubi to form, the nine segments of his back-skirt split apart and grew into the nine fox tails of the bijuu and slammed on the head of the snake summon.

As it was dazed and tried to retaliate, Naruto hefted it over his head with both arms and, with some difficulty, threw the thing high into the air. Sliding his hand across the Driver, it let out a cry of 'Scanning Charge!' and the same ring from before appeared over Naruto, creating a spyglass at the snake.

Foul red chakra flowed from the veins on his gauntlets and greaves to the space his nine tails pointed to in front of his helmet, quickly turning into an incredibly dense black orb that Naruto's helmet swallowed, as the maw on it came to life for a second to do so.

"Kyuubi Hisatsuu!" Naruto roared to the sky, unleashing the faux Bijuudama towards the giant snake, obliterating it from existence before it could return to the summon realm.

Naruto smirked to the sky, not even noticing his red compound eyes were glowing purple for a second, then reverted to himself in his arguably-civilian clothing. He jumped through the trees towards where he was thrown from, intent on bringing the pain to Orochimaru.

(Ten minutes later)

Naruto arrived to the battlefield, only to find a bedraggled Sasuke and Sakura barely holding their own against the Sannin. Already sliding his hand across the Driver buckle, Naruto began a new combo transformation as Orochimaru summoned another giant snake.

"Lion! Tora! Cheetah! La-To-Ra-Tar! Latoraaaatar!"

With a mighty roar of a lion, Naruto appeared in his all-yellow combo, LaToraTar. Blue compound eyes surrounded by a golden mane of sharp armor shaped to look like a lion's mane, yellow gauntlets with long claws folded back at the wrist, and pale yellow greaves with black spots gave way to Naruto as he rocketed towards intercepting the snake, his claws already flipping out.

Sasuke stared death in the face as the snake neared, and closed his eyes for his imminent end. When he heard the snake halt its rush and felt no pain, he dared to open his eyes. When he did, he saw a yellow and black figure, long claws from his wrists, buried in the snout of the snake, facing him, stopping the snake with sheer force.

"What's wrong, Sasuke-teme? Ya scared?" Naruto teased as he ripped out his claws and did a spin kick towards the snake, the blade of his Cheetah legs popping out mid-swing, stabbing into the snake's eyes. As it recoiled and hissed/roared to the sky, it disappeared in a puff of smoke, returning to the summoning realm.

Naruto smirked under his mask and turned towards Orochimaru. "Hey there, Pedo-teme." He greeted the snake Sannin, smirking at the miniscule vein popping on said pale man's forehead.

"Kukukuku… I see you survived my seal, Naruto-kun. And this strange power… What is it?" Orochimaru asked, eying him curiously.

"It's called 'Fuck Off!' It's a new Kekkei Genkai; it allows me the power to fuck you up." Naruto answered, switching out of Latoratar and swiping his hand across the buckle, this time purple rings appearing before him.

From the information Eiji flooded his mind with after their meeting, he knew Putotyranno was the strongest form, but Naruto would have to fight the corruption of the purple Core Medals. He believed in himself and began the process.

"Ptera! Tricera! Tyranno! PuToTyrannosaurus!"

Naruto appeared in his purple combo, green compound eyes accented by the purple wings sweeping across his head and the gold horn of the tiny pterodactyl's beak on his forehead, his shoulder armor bearing gold spikes pointing forward, his gauntlets have an add-on like a triceratops' clawed foot, purple lines down his white bodysuit under the armor, large purple sideskirts at his hips, purple greaves and boots finishing it off. Rearing his head to the sky, Naruto screamed a feral roar in his new form, shaking the entire Forest of Death, and unnerving Orochimaru ever so slightly.

Looking at the ground and thrusting his hand into it, Naruto pulled out the Medagabryu, a hand-axe with the purple translucent blade held in the jaws of a T. Rex, a small cylinder under where he gripped it. While Naruto was bluffing about his supposed 'Kekkei Genkai', he actually did have one; it was just completely useless in the shinobi world and only worked for his Rider forms: Medal Blood. While in Rider form, his blood turned into Medal's he could use for his Scanning Charges, such as with the Medagabryu, which he did so by cutting his palm on the blade and holding the wound to the slot, as the weapon was filled to the unnatural brim with Medals, the blade glowing purple and crackle with electricity. With a quick clamp of the T. Rex's jaws, along with the trademark Gulp, Naruto lunged at Orochumaru and swung, the Sannin dodging. But he didn't jump back far enough, as the sheer energy from the attack formed a huge energy blade that reached far pass how far Orochimaru jumped, and spun around Naruto three times, hitting the pale man every time, ending with a great explosion on the final contact.

Orochimaru yelled as the explosion rocked his entire body and threw him deep into the forest. Once he stopped tumbling, he shed his skin to a completely undamaged form, but knew not to mess with how Naruto was now. 'I guess I'll have to give Sasuke-kun my gift later.' He mused and sunk into the ground.

Naruto stood in his hunched state, still standing with his final strike down, growling breaths escaping his mouth. He reverted before he lost control and turned on his teammates; while he was strong enough to subconsciously do what he just did, the behavior during such just 'cause it was cool when Eiji showed him, his will was wearing thin in this form. Holding back the Kyuubi was nothing compared to this!

Turning to his teammates, he smiled his foxy grin at their shocked faces. "Uh, guys? We still have a test to do." Naruto reminded them.

They snapped out of their stupors and barraged Naruto with questions, Sasuke demanding to have that power, Sakura backing him up that 'Sasuke-kun can be the only strong one on this team!' This earned them both a chop to the neck, knocking them out. "God, can't believe I tried to be friends with him. And I had a crush on her? It's like crushing on a howler monkey! I'm surprised I'm not deaf! Maybe Kyuubi healed my ears every time they should have busted." Naruto mused. Shrugging his shoulders, Naruto hefted his teammates into a nearby tree hollow, letting them rest until they woke up.

(One hour later)

"You can come out, now." Naruto yelled to the forest beyond them.

An Oto team walked out, that team that attacked Kabuto when he talked down on Otogakure, the mummy-man with the… thing on his back, the face-brace dude with tubes in his hands, and the cute girl with really long hair.

Naruto blushed at that thought. 'Where'd that come from?' He asked himself. Shaking his head from those thoughts, Naruto smirked at the Oto team.

"Move aside; we just want the Uchiha." The black haired boy said; Zaku, if he remembered.

"As much as I'd like to let you have your way with him, just to teach him a lesson, I need his emo ass, so I can't let you get to him." Naruto commented. Seeing the Oto team prepare for a fight, Naruto swiped his hand across his buckle.

"Taka! Tora! Bata! Ta-To-Ba! TaToBa, Ta-To-Ba!"

Naruto appeared in the primary combo Eiji took when he took up the mantle of Kamen Rider OOO, Tatoba. A helmet of a red Eagle, green compound eyes, leading to the same arms he had as Latoratar, and legs covered in green segmented armor, the toes ended with two sharp points. Thrusting his hand to the sky, a black sword with blue circuitry detail and a clear slot on the side of the blade fell from the sky, and he caught it as it almost hit the ground. This sword was the Medajalibur, the trademark sword of Tatoba.

"What the fuck?!" Zaku sweared at Naruto's transformation. While they had never seen someone do something like this before, they found it… kind of stupid. It just reminded them of those stupid jumpsuit wearing teens they saw that did weird poses and fought monsters with giant robots. (Kamen Rider vs. Super Sentai Forever!) Unfortunately, Naruto seemed to be able to read their thoughts, as he charged forward with a roar, taking a swipe at Zaku, who dodged only barely, then followed up with a nasty right hook to the jaw, which connected, sending the black haired Oto genin flying into a tree, knocking him out almost immediately.

Turning to Dosu, Tatoba swung, only to be blocked by the Oto genin's Melody Arm, but his blade dug in to the gauntlet a bit. Not letting up on the assault, Tatoba kept swinging at Dosu, who had no room or time to use his Melody Arm, only to block, as the gauntlet took more and more hits. Soon, it was completely broken, and the blade bit into his bare arm, making him grit his teeth to bite back a scream, as Tatoba snapped his right foot up, right in Dosu's chin, throwing him back, knocking him out on contact with a tree.

Turning to Kin, he found she didn't seem to want to fight, so he shunshin'd behind her and chop her in the back of the neck with his hand, knocking her out. Catching her before she fell, Tatoba reverted to Naruto, who carried Kin bridal style towards his sleeping teammates, feeling she wouldn't be safe around her teammates, especially after they lost.

Again, he never noticed his eyes glowed purple for a second.

End Ch. 1

Hope you like what I did with the Kyuubi turning into a Core Medal. With the bijuu turned into a medal, Naruto has full control of his youkai, but he has to train in it, and it will only become harder as he obtains more bijuu (both canon and mythological.) Review and tell me what you think.

Ja ne!