Episode 561 - The Straw Hat Pirates' New Challenge! Luffy's Battle Against the New World Pirates

Episode 561
The Straw Hat Pirates' New Challenge! Luffy's Battle Against the New World Pirates
Japanese: 麦わらの一味の新たな挑戦！ルフィの新世界海賊との戦い
Mugiwara no Ichimi no Aratana Chōsen! Rufi no Shin Sekai Kaizoku to no Tatakai

The crew finds a new island that holds a key clue about the treasure’s location. However, the island is heavily guarded by a mysterious group who seek to prevent anyone from uncovering the truth about the Grand Line. Luffy and the crew fight through waves of enemies to uncover the island's secrets.