Walkthrough:Kingdom Hearts II/Port Royal
First Visit
Sora, Donald and Goofy enter this world, where they'll notice that this world is kinda different, before hear some people screaming. You'll then gain control of the party, where you'll notice that the HP/MP bars are different color than in most worlds. At the Rampart, there will be a save point and a Moogle Shop. Upon reaching the port, you'll encounter Captain Barbossa chatting with Pete, who tells the cat that he and his men are undead pirates. Pete tells the pirate captain to stay clear of Sora and his friends, especially under the full moon. Sora then appears, and Barbossa will then send some pirates out to attack him, while the others go off into the town. At first, they are immune to all attacks. A cutscene then reveals their true forms. Pete will also say that they are weak against magic; use magic to take them out.
Some of the pirates have ran off into the Town to go after a Medallion. One is shown kidnapping a woman, Elizabeth Swann. A man, Will Turner, goes after them, only to be confronted by Heartless. After defeating the Heartless, run back to the port, where you'll see the pirate ship out to sea. A pirate on the Interceptor will explain that Elizabeth is gone, since the Black Pearl is uncatchable. Will asks him to take them to her, explaining that this is a debut for the time Will broke him out of prison. Besides, he needs a crew. The pirate, Captain Jack Sparrow, agrees and lets them onboard. He'll then join the party.
It's revealed that Barbossa and his men are cursed because of the Aztec Treasure that was brought to Cortéz many years ago. To rid themselves of it, they need to bring all 882 Medallions back with the blood of every soul who touched it on each coin. Elizabeth told Barbossa's crew that her surname is Turner, leading him to believe she is Bootstrap Bill Turner's daughter. Bootstrap had touched the Medallion before, so Barbossa needs his blood to reverse the curse; but turns out Bootstrap is nowhere to be found, and that's why Barbossa has been looking for Bootstrap's children who inherited his blood.