Absolutely. UFC Undisputed 2010 is still one of the best MMA sims ever made – especially on a phone with 2x resolution and texture scaling. The vanilla grind is tedious, but with a complete save file, you can spend your time actually fighting legends in dream matches (Brock Lesnar vs. Bruce Lee, anyone?).
Installing save data for the PPSSPP emulator is different from a physical PSP. Follow these steps precisely to avoid crashes. ufc 2010 ppsspp save data