Original: "Zack & Wiki: Quest for Barbaros' Treasure" details the adventures of the titular protagonist, Zack, whose dream is to be the greatest pirate in history.
Simplified: 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.