The 235th episode brings the painful rupture between Luffy and Usopp. Told the Merry cannot be salvaged and a new ship awaits, Usopp accuses Luffy of betraying their vessel, quits the crew, and challenges his captain to a duel for her.
Usopp wakes from the beating the Franky Family gave him, and it is noted Robin still has not come back. Luffy breaks the news that the stolen money is likely gone for good and the crew intends to buy a replacement rather than mend the Going Merry. The announcement enrages Usopp, even as Luffy stresses that the ship's wounds make repair impossible.
Refusing to listen, Usopp becomes convinced his captain has thrown the Merry away. Their argument boils over into a brawl. Beneath his anger lies a deeper wound, a long-held fear that he is too weak to belong among the Straw Hats. He declares he is quitting.
Usopp dares Luffy to a one-on-one fight, with ownership of the Going Merry as the prize. That night Nami tries to talk Luffy out of it and fails; he still means to go through with it. Chopper offers to treat Usopp's injuries, but the sniper turns him away. The two former crewmates head off to face each other.

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This marks the moment Usopp departs the Straw Hat Pirates. The episode includes an error: in Iceburg's office, Robin's childhood wanted poster misspells her name as Nico Robine.
In Episode 235, Usopp refuses to accept that the Going Merry cannot be repaired, quits the Straw Hat Pirates in anger, and challenges Luffy to a one-on-one duel with ownership of the ship as the prize.
Usopp quits in Episode 235 after Luffy announces the crew will buy a new ship instead of repairing the Going Merry. Underneath his anger lies Usopp's long-held fear that he is too weak to belong among the Straw Hats.
Yes, in Episode 235 Nami tries to talk Luffy out of fighting Usopp that night, but she fails and Luffy still intends to go through with the duel.
Usopp challenges Luffy to a one-on-one duel with ownership of the Going Merry as the prize, refusing Chopper's offer to treat his injuries beforehand.
Episode 235 includes an error in which Robin's childhood wanted poster in Iceburg's office misspells her name as "Nico Robine."
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