One Piece

Season 18, Episode 782

Episode Title: The Devil's Fist - A Show Down! Luffy vs. Grount

Air Date: 2017-04-02

Overview:

Making a mad dash for the Submerge with the food they stole, Luffy and the others have to get through some of the Navy's upstart soldiers! Grount, whose arm holds incredible power, summons his training to challenge Luffy.