Naruto's opponent took the sword off his back. It had wraps covering nearly its entire surface, but from what could be seen of it, it was a fairly huge weapon.
"Begin!"
Hyoku swung his sword, the wraps coming off, and it was then that Naruto saw that it wasn't a sword at all. In fact, it appeared to be nothing more than a wooden rod.
'Is that it?' thought Naruto. 'Kinda dissapointing. Why did it have so muchwrapping?'
"I can understand your reaction", said Hyoku. "Rest assured, this is no ordinary wooden rod. I call it Mokugami".
Hyoku ran towards Naruto, narrowly dodging Naruto's Psybeam, and swung at him with the pole. Naruto ducked just as the rod ignited. With a hissing sound, the flames went out again. Hyoku swung the weapon down. This time the weapon bent itself into a zigzig shape before it made contact.
Naruto had tried to step to the side to dodge it, but he hadn't anticipated the weapon changing shape. As a result, one of the corners scraped down the side of his leg.
"What kind of weapon is that?" exclaimed Ino, watching from the stands.
"From the looks of things, it's probably made from the wood of the kind of tree Chakra paper is made from", said Shikamaru. "But in that case, he would have to have already mastered changing the nature of his chakra to three different affinities".
"Three? I only saw him him use one element, plus he changed the shape of his weapon"
"Yes, he set his weapon on fire with fire chakra, but I'm guessing he used Water chakra to put it out again", said Shikamaru. "And as for the shape changing, he could have used Lightning chakra to crumple it in the same way lightning chakra crumples chakra paper".

"Come on, it's not fair if I do all the fighting", said Hyoku. "Show me what you can do"
Naruto grinned. A small whirlwind formed around him.
"Alright then", he said. "Razor Wind!"
A cluster of cresent moon-shaped projectiles made of air flew towards Hyoku, who dodged the attack before throwing Mokugami at Naruto. Naruto leapt to the side before he realised that there was wire connected to the hilt of the weapon. The bent wooden sword curved around in mid-air like a boomerang, flying around him three times before returning to Hyoku's hand. He pulled it back and the wire bound Naruto tightly, so he couldn't escape.
"Now I've got you", said Hyoku, but suddenly, Naruto was gone from his wire trap.
"Razor wind!" repeated Naruto from behind him, launching another barrage of air projectiles.

From the stands, the other ninja watched.
"Vero, is... is Hyoku doing alright?" the blindfolded girl asked her teammate.
"Yeah, he's doing great", said Vero. "He's taking his time about it, though".

Naruto and Hyoku continued their battle. Naruto employed his Psybeam, Razor Wind and Ice Beam attacks over long range, and Taijutsu to fight him over short range.
But Hyoku seemed to have a counter to it all. He used the Zigzag-shaped blade to block Naruto's Razor Wind, cut through Naruto's Psybeam with the straight blade, and set his weapon ablaze to block Ice Beam. He used the straight form of Mokugami over close range and used the zigzag form as a throwing weapon with the wire acting to pull the wooden weapon back to his hand afterwards.

'That's one versatile weapon he's using', thought Naruto. 'And I'm
running out of tricks'
.
He looked up at Hyoku, who had his weapon in its zigzag shape. 'Let's try this one', thought Naruto, running towards his opponent
Hyoku saw Naruto coming, and raised Mokugami, the zigzag shape bending back into a straight line. Naruto's hand was suddenly shrouded in darkness.
'What is this?' thought Hyoku.
"Shadow Claw!" shouted Naruto, the darkness around his hand turning into a three-clawed hand. Unsure if his weapon could block this attack, he leapt back and threw his blade down at Naruto. Naruto smiled as he dodged the attack, as if he had been expecting Hyokhu would make that exact move. Naruto dashed toward Hyoku, but when Hyoku tried to pull Mokugami back to his hand, he couldn't. Looking across at his weapon, he saw that it had become stuck in the wall behind where Naruto had been standing.
'Of course', thought Hyoku. 'He knew that I use Mokugami in its basic
form in close combat, so he ran towards me to make me change its form.
Then, when he pulled out Shadow Claw, I didn't have time to change its
form before throwing it. It flew straight and got stuck in the wall...'
Naruto kicked Hyoku into the air. Hyoku was unable to block this attack as he had become so used to blocking with Mokugami.

"Sky Drop!" cried Naruto, leaping up after him and kicking him to the ground. Hyoku landed with a thud on the ground.

"Well, I guess the best fighter won", said Hyoku, struggling to his hands and knees. "I'm glad to have fought you, Naruto Uzumaki"
And with those words, Hyoku collapsed, unconscious.
"Winner: Naruto Uzumaki!" announced the proctor. His blindfolded teammate looked shocked by the words.
"Kudara Kuroko versus Kin Tsuchi", announced the proctor.

Sorry about the long wait, it took a while to write this chapter (and
the most recent chapter of the Instruments of Time (check that out if
you have time and like big crossovers. I'm accepting teams of
characters submitted by readers).
OC's are still accepted, they'll just take longer to show up. The
"What shall become of Sasuke" poll is also still open, vote on that if
you like. Otherwise, read and review. Thanks!