Episode 508 - The Fight Kicks Off! Luffy and His Team Face Off Against the New World's Toughest Pirates

Episode 508
The Battle Begins! Luffy and His Crew vs. the New World’s Strongest Pirates
Japanese: 戦いが始まる！ルフィと仲間たちVS新世界の最強海賊
Tatakai ga Hajimaru! Rufi to Nakama-tachi VS Shin Sekai no Saikyō Kaizoku

Luffy and the crew launch an assault on the pirate overlords, leading to fierce battles across the island. The crew discovers that the pirates are guarding another powerful artifact linked to the Grand Line's ultimate treasure. As they free the island’s people, the Straw Hat Pirates gain crucial information that could bring them closer to their goal.