Naruto in One Piece: I’m Gol D. Roger’s Eldest Son, Luo

"Ace!" At Marineford, Akainu's huge magma fist comes roaring in. Ace has resolved to die, and Luffy screams in despair!

A black-robed figure flashes into view like a phantom. He has a face identical to Ace's!

"You foolish little brother…" Just a casual remark!

He is Portgas D. Allen, Roger's son and Ace's biological older brother!

With the Mangekyo Sharingan from the start, one Almighty Push slams Marine Admiral Akainu into a wall, and one Amaterasu sets the sea ablaze with black flames!

Fleet Admiral Sengoku, the Three Admirals, and Garp the Hero throw everything they've got into surrounding him, only to discover that the monster before them is beyond their understanding!

"Sage Art: Wood Release: True Several Thousand Hands!" A thousand-meter wooden Buddha rises from the ground, suppressing everything!

"Fire Release: Great Fire Annihilation!" It burns the heavens! "Lightning Lariat!" One blow sends Kizaru flying!

Allen even uses a single [Divine Summoning Technique] to summon Tsunade from the Naruto world to fight Garp.

When the younger generation of the Naruto world appears in the world of One Piece, the pirates could pick on anyone, but they had to pick on Naruto. Didn't they know that picking on him means picking on Sasuke too? Mess with him, and that brother-obsessed man will show you what a nightmare really is!

Ace: "How come I got taken away to train, and now that I'm back, my bounty is already higher than Dad's?"

"Bro, you can't just screw your little brother over like this!"

Allen replies: "You foolish little brother, this is a gift for you!"

Back then, Allen used his life force to restore Whitebeard to his prime, and the whole world witnessed the power of the strongest man!

Garp says, "You didn't see that coming, did you? I got restored to my prime too!"

Roger says, "…I want to come back and go wild one more time too!"