From TV Animation One Piece: Yume no Luffy Kaizokudan Tanjou! English translation
From TV animation ONE PIECE 夢のルフィ海賊団誕生!
An old English patch for the Game Boy Color One Piece RPG, first made by Star Trinket and now with a title screen addendum by Parmentation.
What it is
This English patch was first released by Star Trinket, whose site is no longer online; the last version they put out was version 9. How much of the game it covers is not documented, so expect untranslated parts.
Updates
Parmentation later added an addendum, labelled version 11, that translates the title screen.
Playing it
Apply the patch to your own copy of the Japanese cartridge, following the notes on the romhacking.net page.