Kokonoe: After betraying your friends, it takes a lot to atone for your actions. And these two know that best.

Junko: Riku, one of the Seven Guardians of Light in Kingdom Heart.

Ann: And Sasuke Uchiha, the last Uchiha of Naruto.

Kokonoe: The stage is set and the combatants are ready.

Junko: It's time for a Death Battle!

In the forest not too far from the Hidden Leaf, Sasuke was wandering around ready to give intel to Naruto. He then saw a light suddenly shine brightly behind him as Riku had appeared.

Riku: Aw man, what a ride... alright, now where is that Keyhole?

Riku turned towards Sasuke who was ready to take his sword out.

Sasuke: Who are you? Leave now.

Riku summoned his Keyblade and got in a fighting stance.

Riku: And if I say know?

Sasuke threw his sword at him and Riku went to block it only for Sasuke to switch places with the sword.

Sasuke: Then so be it.

Sasuke kicked Riku through several trees, and as soon as he sat back up Sasuke dashed at him with electricity in his hands.

Sasuke: Chidori!

As he struck, Riku made a barrier around him that blocked Sasuke's attack and knocked him back a bit. Riku then spun and went for a kick, knocking him back. Sasuke went flying but managed to grab his sword and land on the ground. He looked up to see Riku dashing at him and swinging his Keyblade. Sasuke went for a swing of his sword and the two of them clashed before jumping back. Sasuke's hand was then infused with electricity as he fired several electric spears at him and Riku was quick to block them with a magic shield. 

Riku: Try this on for size!

Riku unleashed several chunks of ice that launched at him. Sasuke was quick to slice them all up as Riku fired a giant ball of fire instead. Sasuke quickly stopped in his tracks.

Sasuke: Fire Style, Fireball Jutsu!

He shot a fireball of his own from his mouth. It clashed with Riku's and caused a giant explosion between them. Before the smoke cleared, three orbs of darkness launched at Sasuke and he quickly dodged all of them. Riku then flew at him, swinging his Keyblade and the two of them clashed several times across the forest before Riku jumped up and went for a downward slash, Sasuke jumped back as Riku's strike caused three pillars of darkness to form and Sasuke dodged those as well. A black orb then floated out of Sasuke's hand and into the air.

Sasuke: Chibaku Tensei!

Riku got sucked into it as well as several trees, bushes, and giant chunks of rock. They all came together to form a giant chunk of rock in the sky with Riku in the middle. 

Riku: RAAAAGH!!!

With a huge burst of darkness, Riku then blew the entire thing up. He looked down to see Sasuke firing several fireballs at him and he flew around to dodge them.

Riku: Hah! That the best you got?! Hm?

He looked up to see that the sky had suddenly gotten cloudy and a giant Kirin made of electricity came from the sky.

Sasuke: Try this for size.

He sent the Kirin down on Riku and launched him into the ground with a gigantic, electric explosion. Once the smoke settled, Riku was on one knee. He looked up to see Sasuke approaching him.

Sasuke: Are you done yet?

Riku: Not even close.

Sasuke: Hmph... Almighty Push!

Sasuke raised his arm and everything in front of him was pushed away, including Riku and half the entire forest. 

Sasuke:Summoning Jutsu!

He then placed his hand on the ground to summon a giant snake that went to take a bite out of Riku, who quickly slide to his feet, dashed forward, and cut the snake into pieces.

Riku: Sorry, but I've faced bigger guys.

As he said this, he looked up to see Sasuke in the Susanoo flying in the air with an electric arrow.

Riku: Yeah... something more like that...

 Sasuke fired it and Riku quickly turned into a dark sphere and flew up at him. He dodged the arrow as it caused a giant explosion beneath him and Riku went to slash at the Susano but missed. The Susanoo summoned orbs of black flames and launched them at him but Riku was quick to dodge as it summoned a sword of black flames and swung it. Riku dodged that too and swung his blade through the Susanoo and sent Sasuke flying out of it. As the Susanoo disappeared, Riku went for a downward slash and Sasuke blocked it with his sword before crashing back to the ground. He looked up as Riku flew down and stomped on his chest, causing Sasuke to cough blood. Riku then went for a final stab.

Sasuke: Amaterasu!

But before he could, black flames burst around Sasuke, forcing Riku off of him as he looked up.

Riku: Black flames? Why am I not surprised?

Sasuke stood back up and unleashed a spear of electricity as well as several missiles from his wrist. Before they could hit Riku, time suddenly stopped.

Riku: Sorry, but it's about time that I end this.

Riku slashed at all the missiles and straight through Sasuke. Once time resumed, the missiles blew up as Sasuke was cut into tiny pieces.

Riku: Heh, too easy- Kah!

Suddenly, a spear of electricity pierced through Riku's chest before disappearing. As Riku fell to one knee, he turned to see Sasuke was just fine.

Riku: Huh?

Sasuke: You fell for my Genjutsu... I had this won from the very beginning.

Riku: Tch... dammit...

Sasuke approached him and lifted his sword.

Sasuke: It's over.

Riku: Not yet!

He went to swing it but Riku quickly swing his Keyblade, cutting the sword in half as well as slicing Sasuke's Rinnegan.

Sasuke: Gah!

As Sasuke was bleeding in the eye, Riku quickly stood up and healed himself.

Riku: I can win this... all I need... is a little light!

His Keyblade then turned into a blade of light as Sasuke dashed at him.

Sasuke: I don't need the light! This is my Ninja Way!

Electricity sparked through his hand.

Sasuke: Chidori!

Riku leaned his sword back.

Riku: Zantetsuken!!!

They both went for an attack at a blinding speed before going right past each other. A few seconds had passed as a giant burst of blood came out of Riku's chest. He fell to one knee but used his sword to keep him up as Sasuke's head was cut clean in half and flew up as blood squirted from his body. He fell to the ground as the battle had been won and Riku got to his feet.

Riku Is it over? Finally...

Junko: Ah... a quick one. That was actually kinda refreshing.

Kokonoe: Sasuke had plenty of techniques that could keep Riku on his toes, and his years of experience and better combat training allowed for him to hold his own against Riku... but that wasn't quite enough.

Ann: Yeah, while Sasuke was incredibly strong, Riku was far stronger and faster too. His magic was far more powerful than anything Sasuke has dealt with in the past and since it's not spiritual energy... Sasuke couldn't absorb it.

Kokonoe: On the other hand, Riku had enough ways to power through just about everything Sasuke could throw at him. His shields can block almost all of Sasuke's attacks and he could even stop time without worrying about any of that.

Junko: Looks like that duck hair couldn't handle the key that was Riku's blade.

Kokonoe: The winner is Riku.

Winner: Riku

+Stronger

+Faster

+Better Hax

+Stronger Blade

-Less Experience

-Less Training

Loser: Sasuke Uchiha

+Better Training

+More Experience

+Genjutsu

-Less Hax

-Slower

-Physically weaker