518. An Explosive Situation! Luffy vs. Fake Luffy!
Luffy picks a fight with himself, Chopper falls in with a dubious crowd of imitation pirates, and Zoro causes a commotion when he falls asleep on the wrong ship!
One Piece
Impel Down & Marineford
Luffy puts finding his crew on hold in favor of rescuing his brother Ace from the underwater prison Impel Down. With Boa Hancock's help, he manages to infiltrate the facility. However, fulfilling his objective and escaping the hellish prison might be easier said than done. Having failed to reach Ace before he was transferred, Luffy and his companions escape from Impel Down and travel to Marineford, the base of Marine Headquarters. With the odds stacked high against him, the imminent threat of Whitebeard, and the ulterior motives of pirates that wish to overthrow the Emperor, Luffy struggles to hold his own in this titanic clash of powers.
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519. The Navy Has Set Out! The Straw Hats in Danger!
Chopper struggles to make sense of the changes his “friends” have undergone in the last two years, and the Navy mobilizes in an attempt to stop the pirate posers. Will the real Straw Hats please stand up?
520. Big Guns Assembled! The Danger of the Fake Straw Hats!
Chopper and Usopp flip over Franky’s new body, Brook must choose between rock-n-roll stardom and the life of a pirate, and Luffy wanders into a very dangerous crowd!
521. The Battle is on! Show Them What You Got From Training!
Things get pretty hectic as the Navy finally confronts Fake Luffy's amassed pirate army - and the real Straw Hats prepare to set sail! Things don't go smoothly for either, however, and the real Luffy gets to show off what he has learned in the past two years!
522. Everyone Together! Luffy, Setting Out for the New World!
Luffy and his crew are finally reunited, but before they can set sail, they’ll need help from Dark King Rayleigh, Boa Hancock, and all the friends they’ve made in the last two years!