Sony never released Shaolin Monks on the PSP. However, by 2021, the PPSSPP emulator had matured significantly—but it still could not run PS2 games. Instead, 2021 saw continued attempts to stream or port the game via unofficial channels:
Since the game isn’t natively a PSP title, you need an EBOOT.PBP file. Search for "Mortal Kombat Shaolin Monks PPSSPP 2021 pre-packaged" – the 2021 version was notable for including a 60fps unlocker patch. mortal kombat shaolin monks ppsspp 2021
Unlike the 2D fighters, this is a 3D brawler. You'll chain combos, use environmental hazards (like spikes and pits), and perform iconic Fatalities in real-time. Sony never released Shaolin Monks on the PSP