For Android users, the best alternative is to enjoy Fight Night Round 3 (which does have a legitimate PSP version) or seek out the unofficial Fight Night Round 4 PSP conversion files that some gaming communities have shared. These files are typically distributed in compressed formats like ZIP or RAR to reduce download sizes.
, which remains the only entry in the series developed for the PSP. The Fight Night Round 4 "Zip File" Explained Fight Night Round 4 PPSSPP Zip File For Android...