Marco! The Keeper of Whitebeard's Last Memento!

S19, E108: Marco! The Keeper of Whitebeard's Last Memento!

Available on Funimation, Crunchyroll
In order to recruit a strong ally towards bringing down Kaido, Cat Viper and his crew stop by Whitebeard’s homeland to see Marco, the 1st division commander of the Whitebeard Pirates.