The Alabasta Arc

The Straw Hats, with Kureha's assistant Tony Tony Chopper as a new addition, and Vivi finally arrive at Alabasta, which is on the verge of civil war. Vivi must reach the rebel army and tell them the real cause behind the war, but Sir Crocodile, leader of Baroque Works and one of the Shichibukai won't just stand by and watch.

In this arc Vivi leaves the crew and we meet Crocodile