The Impel Down arc of the One Piece series showcased Luffy’s tenacity ... Featuring the Straw Hats' battle against the Warlord Crocodile, the crew's adventures in Arabasta had a huge influence ...

Long time no see! - Crocodile to Luffy in Impel Down However, later during the Marinford Arc, Crocodile, now a member of One Piece's Cross Guild, was also revealed to have a connection to Ivankov ...