Episode 165 - A New Challenge! The Power of the Sea King

Episode 165
A New Challenge! The Power of the Sea King
Japanese: 新たなる挑戦！海王の力
Aratanaru Chōsen! Kaiō no Chikara

The Straw Hat Pirates discover that the lost treasure the warriors were protecting has the ability to grant immense power. However, it is revealed that the treasure comes with a heavy price: whoever claims it must give up something they hold dear. The crew must decide whether the treasure is worth the sacrifice it demands.
Skypiea Saga
Next Episodes:
Episode 166 - The Great Showdown! Luffy vs. Mr. 3
Episode 166 - The Great Showdown! Luffy vs. Mr. 3
Episode 167 - The Last Battle! Luffy and Crocodile’s Final Showdown
Episode 167 - The Last Battle! Luffy and Crocodile’s Final Showdown
Episode 168 - The Pirate King’s Promise! Luffy’s New Goal
Episode 168 - The Pirate King’s Promise! Luffy’s New Goal
Episode 169 - The Great Adventure Continues! Luffy’s Crew Finds a New Goal
Episode 169 - The Great Adventure Continues! Luffy’s Crew Finds a New Goal
Episode 170 - The Battle of the Century! Luffy vs. Zoro
Episode 170 - The Battle of the Century! Luffy vs. Zoro
Episode 171 - The Final Battle Begins! Luffy’s Challenge to the Pirates
Episode 171 - The Final Battle Begins! Luffy’s Challenge to the Pirates
Episode 172 - A New Crew Member! Chopper Joins the Pirate Crew
Episode 172 - A New Crew Member! Chopper Joins the Pirate Crew
Episode 173 - The Straw Hat Pirates and the Devil’s Fruit
Episode 173 - The Straw Hat Pirates and the Devil’s Fruit
Episode 174 - The Greatest Showdown! Luffy vs. Crocodile and Baroque Works
Episode 174 - The Greatest Showdown! Luffy vs. Crocodile and Baroque Works
Episode 175 - The Great Escape! Luffy’s Battle Against the Grand Line Pirates
Episode 175 - The Great Escape! Luffy’s Battle Against the Grand Line Pirates
Episode 176 - The Great Adventure! Luffy vs. the Pirates of the New World
Episode 176 - The Great Adventure! Luffy vs. the Pirates of the New World
Episode 177 - The Final Challenge! Luffy’s Battle to Become the Pirate King
Episode 177 - The Final Challenge! Luffy’s Battle to Become the Pirate King
Episode 178 - The Grand Line! The Treasure of the Pirate King
Episode 178 - The Grand Line! The Treasure of the Pirate King
Episode 179 - The Greatest Battle Begins! Luffy vs. the Pirate King's Forces
Episode 179 - The Greatest Battle Begins! Luffy vs. the Pirate King's Forces
Episode 180 - The Battle Continues! Luffy vs. the Forces of the Grand Line
Episode 180 - The Battle Continues! Luffy vs. the Forces of the Grand Line
Episode 181 - The Grand Line Adventure Continues! The Straw Hat Pirates’ New Goal
Episode 181 - The Grand Line Adventure Continues! The Straw Hat Pirates’ New Goal
Episode 182 - The Pirate King's Legacy! Luffy’s Resolve to Become King
Episode 182 - The Pirate King's Legacy! Luffy’s Resolve to Become King
Episode 183 - The Battle of the Century! Luffy vs. the New World Pirates
Episode 183 - The Battle of the Century! Luffy vs. the New World Pirates
Episode 184 - The Great Adventure! Luffy and His Crew Meet New Allies
Episode 184 - The Great Adventure! Luffy and His Crew Meet New Allies
Episode 185 - Luffy’s First Victory! The Challenge of the Pirate King’s Forces
Episode 185 - Luffy’s First Victory! The Challenge of the Pirate King’s Forces
Episode 186 - The Power of the Sea Kings! Luffy’s Next Step
Episode 186 - The Power of the Sea Kings! Luffy’s Next Step
Episode 187 - The Straw Hat Pirates’ New Beginning! A New World Awaits
Episode 187 - The Straw Hat Pirates’ New Beginning! A New World Awaits
Episode 188 - The Return of the Straw Hat Pirates! Luffy’s Final Battle
Episode 188 - The Return of the Straw Hat Pirates! Luffy’s Final Battle
Episode 189 - Luffy’s New Goal! To the Grand Line and Beyond
Episode 189 - Luffy’s New Goal! To the Grand Line and Beyond