One Piece: Grand Battle! Swan Colosseum English translation
ONE PIECE グランドバトル! スワンコロシアム · One Piece Swan Colosseum
splinton's English patch for Bandai's Japan-only One Piece fighting game on the WonderSwan Color.
What it is
splinton released version 1.0 of an English translation for Swan Colosseum, the One Piece fighting game Bandai put out on the WonderSwan Color in 2002, so the game's text can be read in English.
Playing it
Apply the patch to your own copy of the original Japanese game, following the instructions on the romhacking.net page linked here.