One Piece Movie 14: Stampede - Episode 1 -

: The film features massive fan service, bringing together the Straw Hats, the Worst Generation (including Law and Kid), the Marines, and members of the Revolutionary Army like Sabo to take down Bullet. Where to Watch

While is a standalone feature film rather than an episodic series, there are specific "prequel" episodes in the main anime and a primary plot for the movie itself that match your interest. Prequel Episodes (The "Carbonic King" Arc) One Piece Movie 14: Stampede - Episode 1

To set the stage for the movie, the One Piece anime aired a two-episode tie-in arc. : The film features massive fan service, bringing

: These episodes follow Luffy as he attempts to restock the Thousand Sunny's cola supply on an island ruled by the Cidre Guild, a group of bounty hunters. He reunites with Boa Hancock, and they eventually obtain an invitation to the Pirate Festival featured in the movie. One Piece Movie 14: Stampede Plot : These episodes follow Luffy as he attempts

You can find the movie and its prequel episodes on major anime platforms: