One piece - Season 7, Episode 02: An Explosive Situation! Luffy vs. Fake Luffy!
Season 7 deals with the Straw Hat Pirates' infiltration of and escape from a Marine fortress to reclaim their confiscated treasure. The Straw Hats later meet Foxy the Silver Fox and his crew, who challenges them to the Davy Back Fight, a competition involving battles between Foxy's crew and Luffy's crew.