ONE PIECE Volume 65 "Zero"

Fighting with the New Fishman Pirates, Flying Pirates Captain Vander Decken IX. He moves the Ark Noah, which is half the size of Fishman Island.

Then, Hody Jones, the captain of the New Fishman Pirates, crashes the Ark Noah and tries to destroy the Straw Hat Gang and the entire Fishman Island. The battle between Hody and Luffy shifts to the water, which is advantageous for the fishmen. However, Luffy's confidence in victory is unwavering.

The two years of training were there to carry out the man's determination to protect everything that was important to him.