Davy Back Fight, One Piece Wiki

The Davy Back Fight is a traditional pirate game held in homage to the mythical Davy Jones, meant to challenge—and conscript—members of opposing crews. Canonically, only the Foxy Pirates have been known to initiate these games. However, Usopp, Sanji, Nico Robin, and Franky have all independently confirmed its status as a genuine pirate tradition. Little is known about the history of the game, except that it was supposedly created on Pirate Island, by pirates fighting over the best possible sailo

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