Episode 489 - The Ultimate Showdown for the Pirate Ruler's Heritage! Luffy Versus the Top Buccaneers

Episode 489
The Final Battle for the Pirate King’s Legacy! Luffy vs. the Greatest Pirates
Japanese: 海賊王の遺産をかけた戦い！ルフィVS最強の海賊たち
Kaizoku-Ō no Isan o Kaketa Tatakai! Rufi VS Saikyō no Kaizokutachi

The crew uncovers the larger conspiracy behind the treasure hunt, which involves a powerful organization operating in the shadows. As they investigate further, they are confronted by members of this organization who are determined to stop the Straw Hat Pirates from finding the treasure. This episode introduces a new and dangerous group of enemies.