The Ghost Pirate seems to be a combination between Captain Whiskers and Johnny; It has a black pirate hat, a sword, and ripped clothes, something a pirate would typically wear. It is mostly green, with some brown and orange stripes on its long and gray spikes. It has dark green spots on its legs and arms with peach colored clothes.
The Ghost Pirate mainly fights in hand-to-hand combat, swinging his sword and kicking. When the player hits the jewel in his chest (his weak point) a few times, the jewel will fly away and come to rest on the Crow's Nest and will stay there until it is hit a few times. But just because it's not in the Ghost Pirate, doesn't mean the Pirate can't move. It will still go after the player (though whacking the Ghost Pirate a few times will cause it to fall apart for a little while). As the fight goes on, the Ghost Pirate will perform a vortex of fire or spit fireballs that will even harm Blaze (since she is invulnerable to fire) and will also fly up into the air and slam down on the ship. When it slams down, the player will be stunned unless they jump when it comes down. At times, the Ghost Pirate will also dismember himself and charge toward the player. Repeat this process until its health bar is down. When the jewel's health is completely down, the jewel will fly around the stage erratically (wildly without its movements being predicted) until the player hits it. The jewel will then explode and the fight will end. However, the player must move quick, for if the jewel plants itself on the crow's nest again, it will regain some of its health and the battle will continue. The huge slow-down with some attacks can make this boss considerably more difficult.