Zhou Bayu eats the new Copy-Copy Fruit dish at a Pirate King-themed restaurant, then transmigrates to the world of Pirate King. He uses his Devil Fruit ability to copy other Devil Fruit powers wherever he goes, making battles against the Four Emperors and the Marines easy as can be.
Kaido: "Never provoke Zhou Bayu."
Big Mom: "Zhou Bayu is too strong. No one in my family is to provoke him."
Shanks: "Impressive, impressive. Good thing we're friends."
Whitebeard: "What a powerful brat!"
Blackbeard: "Zhou Bayu, just you wait. I'll make you pay for the pain you've caused me." But that's never going to happen.
In the end, he even breaks through the limits of space to reach new worlds and embark on new adventures. His original abilities never disappear, and his power continues to grow without limit.
Naruto: "Infinite chakra?"
Ichigo: "What incredible spiritual pressure!"
Doraemon: "How did he copy my magic pocket?...
This novel and its characters are entirely fictional. Any resemblance to actual people or events is purely coincidental. Do not imitate.
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Are you writing a narration? Third person perspective, storytelling?