Episode 664 - Luffy’s Last Promise! The Battle to Become the Pirate King

Episode 664
Luffy’s Last Promise! The Battle to Become the Pirate King
Japanese: ルフィの最後の約束！海賊王になるための戦い
Rufi no Saigo no Yakusoku! Kaizoku-Ō ni Naru Tame no Tatakai

The crew faces a new group of powerful foes, including former allies who have now turned against them. The battle pushes the Straw Hat Pirates to their limits, and they are forced to make difficult choices. As they fight for their survival, they learn that the fate of the world may rest on the decisions they make in this pivotal moment.