Episode 197 - The Ultimate Clash Kicks Off! Luffy's Defiance Against the Pirate King's Troops

Episode 197
The Final Battle Begins! Luffy’s Challenge to the Pirate King’s Forces
Japanese: 最後の戦い開始！ルフィ、海賊王の軍団への挑戦
Saigo no Tatakai Kaishi! Rufi, Kaizoku-Ō no Gundan e no Chōsen

The crew discovers the final clue that will lead them to Pluton, but they are confronted by a group of powerful enemies who will stop at nothing to prevent them from claiming the treasure. The episode highlights the escalating stakes as Luffy and his crew face their most dangerous challenge yet.