Many videos and download links for "Pirate Warriors 4 on PSP" are actually clever modifications of older, native PSP anime fighting games.
Because One Piece: Pirate Warriors 4 does not exist on PSP, sites claiming to offer a "1:1 port" are often misleading. Be extremely cautious when downloading these files. Avoid any site that asks you to complete surveys or download .exe files to access the ISO, as these are common vectors for malware. one piece pirate warriors 4 psp iso install