These are the instructions given IN GAME for the PotC mini-game

http://www.toontowncentral.com/sts/vmk/pirates instructions.jpg
Defeat Level 1 10 times: Pirate Level 1 Bonze Doubloon
Defeat Level 2 10 times: Pirate Level 2 Silver Piece
Defeat Level 3 10 times: Pirate Level 3 Gold Sovernein
Then go see Captian BlackHeart: INVISIBILITY PIN!!!


A new guide can be found at http://www.disneysonlineworlds.com/index.php/Pirates_of_the_Caribbean