The Prinny Baal Pirate is a pirate that appears in the Land of Carnage in Disgaea 2: Cursed Memories and its remake Dark Hero Days. When encountered, he will initially be by himself. However, if the player defeats the Pirate, then the next time he is seen, he will be even more powerful, with three clones of the original Baal as his "crew-mates."
This enemy is only encountered in the Land of Carnage, on a rank 40 item, on floors 91-99, after you have defeated Baal, Prinny Baal, and Prinny Baal in the Land of Carnage. Any attempts to seek him out in Holt Village's Item World will bear no fruition.