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 . Zack , Wiki , and Johnny Style join forces with the Rose Rock Pirates and travel to Treasure Island . Zack and Wiki give chase and join forces with the Rose Rock Pirates to trail Barbaros to Treasure Island , which seemingly floats in a gap at the center of the earth .