A pirate called Zack and a monkey called Wiki search for treasure and meet a pirate called Barbaros ( who is a flying skull ) after their plane was destroyed . Zack and Wiki agree to help him get his body back if he gives them his ship and treasure . `` Zack & Wiki : Quest for Barbaros ' Treasure '' details the adventures of the titular protagonist , Zack , whose dream is to be the greatest pirate in history .