Pirate Island is an island in the Nonestic Ocean near the Isle of the Mifkets. It is inhabited by retired pirates and bandits, and also by a strange creature named Sport. Anyone who lands on the island is forced to pay a heavy ransom, or be boiled in oil for three days.
When John Dough, Chick the Cherub, and Para Bruin landed on the island, John gave up as ransom the three diamonds he had gotten from the Diamond Maker on the Isle of Phreex. The pirates demanded more, but John and his companions were rescued by Flamingos before any harm could come to them. (John Dough and the Cherub)