It is technically impossible to play Fight Night Round 4 on PPSSPP because the game code for the PSP does not exist.
: Some fans create "ISO mods" of Fight Night Round 3 that update the roster or textures to resemble Round 4 . fight night round 4 ppsspp highly compressed install
October 26, 2023 Subject: Feasibility, Risks, and Technical Analysis of Downloading and Installing Compressed Game Files. It is technically impossible to play Fight Night