Naruto Travel Between Worlds Of One Piece

"Dai Enkai: Entei!" (Great Flame Ring: Flame Emperor!)

Naruto held a blazing fireball in his hand, shining like the sun. His eyes coldly swept over Fishman District, locking onto the panicked fishmen.

"Fishmen are supreme?"

With a sneer tugging at his lips, Naruto casually hurled the Flame Emperor downward.

In an instant—

"BOOM!!!"

A raging inferno engulfed the entire street.

Many fishmen didn't even have time to scream before they were consumed by the flames, their bodies reduced to ash in moments.

The entire district turned into a world of fire, the devouring blaze annihilating everything in its path.

A few minutes later, Fishman District—located 10,000 meters beneath the sea—was reduced to ruins, scattered with charred corpses.

"Ugh…"

The mermaid princess Shirahoshi tearfully covered her mouth.

Her naturally powerful Kenbunshoku Haki (Observation Haki) allowed her to hear the voices within people's hearts.

That was why she had heard the final cries and anguish of those fishmen as they burned alive, making her heart ache unbearably.

"Don't cry. Letting those guys live would've brought even more harm to Fishman Island."

Naruto cast her a glance and said calmly:

"In this world, humans are the dominant race. Whether it's the Marine Admirals or the Four Emperors of the New World…"

"They're all human. There's no way they'd allow their race to be subjugated."

"If those fishmen kept living and provoked the Marines, maybe they'd get away with it—but if they angered a Yonko, the entire Fishman Island would be wiped out."

Shirahoshi tearfully nodded.

Though kind-hearted, she wasn't a fool—she knew Naruto's words were true.

Among the pirates of the New World, Whitebeard was already one of the most benevolent. He genuinely protected those who bore his flag.

Yet even so, there were several islands the Whitebeard Pirates had wiped out in the past.

Because those islands killed members of his crew.

If someone like Hody Jones, driven by fishman supremacist ideology, had provoked a Yonko, the disaster that would've befallen Fishman Island would've been unimaginable.

Though she understood this in her heart, Shirahoshi still couldn't stop her tears as she looked at the burning ruins of Fishman District.

Naruto shook his head and didn't bother with it further. With a flicker of his body, he used Hiraishin no Jutsu (Flying Thunder God Technique) to teleport to a sandy beach on Fishman Island.

"Tajū Kage Bunshin no Jutsu!" (Multiple Shadow Clone Technique)

Thousands of shadow clones sprang into existence. Naruto smiled and said:

"Brothers, we're going to be staying here for a while. Let's start our training according to the plan we came up with last time!"

All the shadow clones grinned and immediately got to work.

About ninety percent of them began physical training—carrying huge stones on their backs while doing push-ups and sit-ups on the sand.

The remaining ten percent focused on refining their ninjutsu techniques.

"Not bad," the real Naruto said with a grin. "Training taijutsu in the One Piece world really is far more effective."

One clone carrying a boulder while frog-jumping smirked and said, "Not just that. I can feel my body getting tougher—the vitality is rising steadily."

Another nodded. "With our Uzumaki bloodline, our life force was already strong. At this rate, give it another year or two and even if we released the Kyūbi, we wouldn't die."

The real Naruto shook his head. "We wouldn't die even now—just be weakened for a while."

"But what's important…" Naruto's eyes gleamed. "As our bodies grow stronger, all our abilities are rising. If we add Hachimon Tonkō (Eight Gates Technique), our strength could hit the Chōkage level."

All the clones smiled simultaneously and shouted:

"At that point, we should be able to return to Konoha and take a look, right!?"

Time passed quickly.

The beach was now lively—not only filled with Naruto's clones but also Guren, Karin Uzumaki, and Suigetsu Hozuki…

Only, each and every one of them looked half-dead.

Suigetsu was doing push-ups and muttered weakly:

"Menma-dono, no, Naruto-dono… Can I take a break now? I've already done 1,242 push-ups…"

Thinking back on the past two days, Suigetsu nearly broke down in tears.

He'd finally reached the legendary Fishman Island, and before he could even flirt with any mermaids, he was dragged into brutal training by Naruto.

The training here was at least ten times tougher than back in Otogakure.

Even with his decent strength, he now felt like he was dying.

One of Naruto's clones was sitting on his back and said coldly:

"Quit whining. Do you know how many people would kill for the chance to train here?"

The high-oxygen environment of the One Piece world was a dream come true for shinobi.

A single day of training here equaled nearly a month of training back in the Naruto world—and it also enhanced the body's physical attributes.

Naruto figured if Guy-sensei came here, he'd probably be so excited he wouldn't sleep just to keep training.

Suigetsu looked like he was about to cry.

He had never been that ambitious to begin with—becoming super strong was never really on his radar.

"Enough talk. Say one more word and I'll hang you up and roast you," the clone snapped, raising a flaming hand.

Suigetsu flinched and, gritting his teeth, resumed his training.

The others, seeing his sorry state, had no choice but to grit their teeth and push on.

Still, amidst the training, all eyes turned toward the center of the beach—

There, Naruto's true body was sparring with Marco, refining their Busoshoku Haki (Armament Haki).

Golden chains were wrapped around Marco's legs, and his arms were cloaked in black Haki as he threw a punch and said with frustration:

"Uzumaki Naruto, I don't mind helping you train, but can't you at least take off these chains?"

Naruto's own right arm was cloaked in Haki as he met Marco's punch head-on.

"Nope. You're the Phoenix. What if you try to fly off?"

Marco's mouth twitched. He instinctively glanced at the bubble membrane above them.

He wanted to say: This is Fishman Island. We're ten thousand meters under the sea. Even if I wanted to fly, where would I go?

But seeing Naruto's serious expression, he could only sigh and keep swinging.

"BOOM! BOOM! BOOM!"

Fist after fist collided, producing thunderous booms.

Though it was a mere exchange of punches, the sound was like rumbling thunder.

The spot where the two trained had long since become a wasteland—massive craters and deep footprints scarred the terrain.

The entire beach trembled, as though even it could not bear the intensity of their clash.

"Monsters, both of them!"

Kimimaro bit his lip as he watched the battle. "They've been fighting for two days straight… Do they not need sleep? Does their stamina never run out?"

He glanced at the heavy stone on his back—just doing a thousand push-ups was enough to make him collapse.

"And yet Menma-dono—no, Naruto-dono—is younger than me…"

Kimimaro clenched his teeth harder, silently enduring.

(End of Chapter)

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