In order to unlock the three secrets in this game you need to meet ALL of the following requirements: -Over 2500 kills -All crew members found -Over 12 non-storyline ship battles, including the 4 extra ''monster battles'' -All bounties defeated and reported -All discoveries found and reported -90% or higher treasure discovery After this you can find the Gold Hamachou above the tunnel which connects mid-ocean to the sailor's island area, you can buy the Sky Fang from the mystery merchant, and you can go fight Air Pirate Vigoro at Crescent Island. (Note: many of these stats can be checked at Hamachou Island.)