Naruto and Goku stood high above the strange island, the sky stretching wide around them. Their energy pushed the clouds away. Naruto could feel Kurama's power inside him, hot like fire. Goku could feel his Saiyan blood rushing, telling him this fight would be amazing.
Naruto looked at Goku and smiled. "You are strong. I like strong people."
Goku laughed. "Same here. Let's have fun!"
With one loud step, the battle began.
Naruto rushed forward first. Blue chakra formed around him like a storm. His speed increased, and the ground below cracked. He swung his fist at Goku's face.
Goku blocked with one hand easily.
"You are fast," Goku said with a playful smile, "but try harder!"
Naruto jumped back and made his favorite move. "Shadow Clone Jutsu!"
Hundreds of clones appeared in the sky, filling every direction. They all charged Goku at the same moment.
But Goku teleported behind them with Instant Transmission.
"Too slow!"
He punched a clone, and it exploded into smoke. More clones tried to kick him, but Goku flew through them like a bullet. In seconds, most clones were gone.
Naruto grinned. "Nice! But this is only my warm-up."
He formed a Rasengan glowing bright blue. He hit Goku from the side, sending him flying into a floating mountain piece. Rocks shattered everywhere.
Goku stood up, brushing dust off his clothes.
"That hurt," he said, excited. "Good!"
He powered up — golden light flashed and his hair turned Super Saiyan. The air shook like thunder. Even Naruto felt the energy hit his skin.
"So this is Super Saiyan… Amazing!" Naruto whispered.
Goku flew forward, punching faster than Naruto could count. Naruto blocked some hits, but many landed on his chest and arms. He fell down toward the ground—but stopped himself with chakra and jumped back up.
Naruto entered Sage Mode, his eyes turning into toad-like markings. Nature energy flowed through him, calm but powerful.
Now both fighters were truly serious.
They clashed again—chakra against ki, fist against fist. Every punch released shockwaves. Wind circles formed around them with every movement. Fighters on Earth or in the ninja world would be terrified by this power.
Naruto created a giant Rasengan, almost as big as a house.
Goku formed a bright blue Kamehameha, ready to fire.
Both attacks launched—
BOOM!!!
The island shook. Water around the island rose like a giant wave. Light covered the entire sky for a moment. The explosive force separated the fighters again.
Goku was excited more than ever.
"You have power like Vegeta or even Beerus! Are you a god?"
Naruto shook his head.
"No. I just protect my village and my friends. That makes me strong."
Goku smiled wide. "I like that answer."
Naruto felt his chakra dropping. This fight was not going to be easy. For the first time in a long time, he felt a real challenge.
Goku took a deep breath and looked up at the stars above them.
"Let's move to the next level."
His hair grew even taller and sharper. His aura turned blue like deep ocean fire.
Super Saiyan Blue.
Naruto's heart beat faster. He knew he needed more power. Kurama's voice echoed in his mind.
"Naruto… let me help. If you want to win, you need me completely."
Naruto nodded.
Bright golden chakra exploded from him. Kurama's full form appeared behind him. His eyes glowed red. His tails moved like fire.
Kurama Chakra Mode — Full Power.
Now both fighters were equal again.
The final punch of the chapter came—
Goku threw a lightning-fast punch. Naruto met it with a punch of his own. Their fists collided.
CRACK!!!
The sky tore open with a blinding light.
Their faces showed excitement, not fear.
This battle was only beginning.
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Two beings arrive — one from Naruto's world and one from Goku's world.
They bring a terrifying warning.
This fight… could destroy both universes.