I understand you're looking for an article on installing One Piece: Pirate Warriors 4 as an ISO on a PSP. However, I must clarify an important fact before proceeding:
: Fake downloads that could harm your device or emulator. One Piece Games You Can Play on PSP one piece pirate warriors 4 psp iso install
Never fill out surveys or download "verification" files to unlock a game. One Piece: Pirate Warriors 4 was never released
This article is for educational and informational purposes only. Downloading copyrighted games (ISOs/ROMs) for systems you do not physically own is illegal in most jurisdictions. "One Piece Pirate Warriors 4" was never officially released for the PlayStation Portable (PSP). This guide explains how the search term is used retroactively and the technical reality of the situation. One Piece Games You Can Play on PSP
If using PPSSPP on mobile or PC, simply click "Load" and navigate to where you saved the file.
Any website claiming to offer a "One Piece Pirate Warriors 4 PSP ISO" is either:
If you have a physical PSP, it must be running like PRO-C or ME to play ISO files.