While PPSSPP is the most famous mobile emulator, Shaolin Monks is a PS2 game. If you are using a modified version specifically for PPSSPP: Open the app. Go to the Games tab.
Once you've found a reliable source, download the game file in .ISO or .CSO format. You may need to download a zip file that contains the game file, so make sure to extract it using a zip file extractor. While PPSSPP is the most famous mobile emulator,
Set "Upscale Multiplier" to 1x or 2x depending on your phone's power. While PPSSPP is the most famous mobile emulator,