The Pirate King is the boss version of the pirate mob. The Pirate King can be found on the biggest boats in his own chamber, and also on the Pirate Island, also in his own chamber.
The Pirate King uses daggers as his main weapon, and has the ability to "clone" himself to trick the enemy, these "clones" dissapear once they hit you, before dealing any damage. He also has the ability to teleport, and might appear behind you or even above you.
The Pirate King has 500HP, and is quite hard to kill unless you have proper armor. Iron armor or better is recommended