Episode 804 - Conclusion of the Uprising! The Supreme Clash for the Buccaneer Ruler's Seat

Episode 804
The Revolution’s End! The Ultimate Battle for the Pirate King’s Throne
Japanese: 革命の終焉！海賊王の座をかけた究極の戦い
Kakumei no Shūen! Kaizoku-Ō no Za o Kaketa Kyūkyoku no Tatakai

The Straw Hats receive the aid of a legendary pirate who once challenged the World Government. This pirate reveals important information about the True History, a long-lost secret that could bring down the entire World Government. With this newfound knowledge, Luffy and his crew gain the strength to push back the invaders and reclaim the island.