One Piece: Stampede

Directed by Takashi Otsuka with Eiichiro Oda as creative supervisor, the film unfolds at a festival made by pirates for pirates, where the prize on offer is treasure once belonging to the Pirate King himself. Its packed cast pulls in the Worst Generation, Warlords, Marines, and Revolutionaries.

Behind the spectacle, the schemer Buena Festa has revived the event to unleash Douglas Bullet, the Demon Heir who once sailed under Gol D. Roger, intending to ignite an era defined by humanity's struggle against an unstoppable force.

The Straw Hats join the treasure race on Delta Island, riding a Knock Up Stream to a floating island piled with riches as crews brawl for the prize. An injured Law warns that the festival is a trap, and his group uncovers Festa's plan to summon a Buster Call down on everyone present.

When Bullet arrives and seizes the treasure, he overwhelms the entire Worst Generation, then converts his ship into a giant robot using the Gasha Gasha no Mi. After Luffy's Gear 4 falls short, Bullet awakens his power and absorbs the island's fleets into a colossal metal titan, setting his sights on killing the Four Emperors.

An unlikely alliance forms as Sabo, Smoker, Crocodile, Law, Lucci, Hancock, and the Straw Hats coordinate to crack open the colossus, with Law cutting gaps in Bullet's Haki so the others can shatter its limbs. Luffy breaks through with a King Kong Gun, and after a final fistfight defeats Bullet, then crushes the Eternal Pose to Laugh Tale, declaring he needs no shortcut to reach it.

Oda stated he would only have allowed the story to be made as a twentieth-anniversary celebration, and the film packs in cameos and wanted posters spanning the entire series.

It marks the movie debut of dozens of characters, including Law, Kid, Mihawk, Smoker, and Hancock, and holds the record for the most Supreme King Haki users in any One Piece film. Its post-credits scene, showing Roger reject an Eternal Pose to Laugh Tale, anticipated a manga revelation that surfaced months later.