Having premiered back in 1999, Toei Animation's adaptation of Eiichiro Oda's One Piece, has gone on to become the most successful anime franchise in the company's history, recently dethroning its predecessor Dragon Ball. Over the course of 25 years, the One Piece anime has followed the travels of the Straw Hat Pirates led by their Captain Monkey D. Luffy, as they set out to conquer the Grand Line and claim the Pirate King's fabled treasure.