This inquiry appears to refer to , titled "A Big Turnaround! Luffy's Fist of Anger Explodes," which is the conclusion of the anime-only Caesar Retrieval Arc . Episode Overview

Episode 628 serves as a bridge between the Punk Hazard and Dressrosa arcs. It follows the conclusion of the battle against , a pirate who uses the Peto Peto no Mi (Pet-Pet Fruit) to control humans and animals with mind-controlling collars. Key Plot Points

While the first half of the episode is filler, the final segment (starting around the 19:00 - 23:36 minute mark ) is canon. This section reveals shocking news: Donquixote Doflamingo has resigned from the Seven Warlords of the Sea and abdicated the throne of Dressrosa. Analysis of the "23:36 Min" Timestamp