Complex sentence: With his powers he fed off the Ocean King's powers until he was too weak to fight, as well brought Link, Tetra and Linebeck to the World of the Ocean King when they boarded the Ghost Ship.
Split into simpler sentences: With his powers he fed off the Ocean King's powers until he was too weak to fight. He also brought Link, Tetra and Linebeck to the World of the Ocean King when they boarded the Ghost Ship.