Sprocket appears to be the leader of the Pirate ship crew, since the death of Captain Darkwater. He is a large Pirate, with the appearance of a robot. You see him at the beginning of the game on the Angorian Sea, and fight him breifly late in the game in the Darkwater Cove caves. The battle is the usual shoot a lot and do not die battle, and will take no longer than a minute if your weapons are upgraded decently. You just need to watch out for his large bombs that he will fire at you.