Episode 510 - The Supreme Test! Luffy Battles the Top Pirates in the New World

Episode 510
The Ultimate Challenge! Luffy vs. the Greatest Pirates of the New World
Japanese: 究極の挑戦！ルフィVS新世界の最強海賊たち
Kyūkyoku no Chōsen! Rufi VS Shin Sekai no Saikyō Kaizoku-tachi

The pirate overlords are defeated, and the island’s inhabitants are freed. However, the crew learns that the artifact they uncovered is part of a larger puzzle involving the lost history of the Grand Line. They set sail to explore a new island that may hold the next clue, but a mysterious new group of pirates stands in their way.