Simplify the following text for a Grade 10 native English-speaking person.
Original: After Zack and Wiki find all of Barbaros ' parts and revives him , Barbaros betrays Zack and Wiki to keep his ship and treasure , and returns to Treasure Island .
Simplified: Finding the last piece of Barbaros in a chest in the captain 's own castle , Zack rings Wiki in order to return Barbaros to his former self . This restores Barbaros ' humanity , but also reveals his true intentions , that he never planned to give Zack anything and wishes Treasure Island all for himself .