Installment 485 - The Straw Hat Crew's Final Escapade! Luffy Against the World Regime

Episode 485
The Straw Hat Pirates’ Last Adventure! Luffy vs. the World Government
Japanese: 麦わらの一味、最後の冒険！ルフィVS世界政府
Mugiwara no Ichimi, Saigo no Bōken! Rufi VS Sekai Seifu

As they investigate the shipwreck, the crew uncovers the tragic story behind the lost ship. They learn that it was once a famous pirate ship that was lost during an expedition to find the legendary treasure. This revelation leads the crew to believe that the treasure may be closer than they thought.