One Piece: Episode of Sabo: Bond of Three Brothers, A Miraculous Reunion and an Inherited Will (2015)

After entering the “New World,” the Straw Hat Pirates reunite with Trafalgar Law on Punk Hazard Island and form an alliance with him. They infiltrate Dressrosa, ruled by Doflamingo, who is connected to the Four Emperors’ Kaido. There, Luffy learns that the Flame-Flame Fruit once possessed by his late brother Ace is being offered as the prize in a colosseum tournament, so he enters the competition under the name Lucy. Meanwhile, Sabo, Luffy’s other brother, who is active as a member of the Revolutionary Army, has also infiltrated Dressrosa with his comrades.