Look for " Musou Orochi 2 Special ISO" rather than "Ultimate".
If you want to experience this epic crossover on your phone or PC via PPSSPP, follow these steps to find the correct file: warriors orochi 3 ultimate ppsspp iso
This is the base game ported to the PSP in 2012. It includes two bonus characters (Rachel and Seimei Abe) and a Battle Royale mode. Because it was only released in Japan, most ISOs you find will be in Japanese, though fan-made English translation patches exist. Look for " Musou Orochi 2 Special ISO"
Differences/additions from other versions of WO3? - GameFAQs warriors orochi 3 ultimate ppsspp iso