What you see online as "MKX for PPSSPP" are typically of an older game called Mortal Kombat: Unchained . These mods use custom textures and save data to make the older game look like Mortal Kombat X on your emulator. Quick Reality Check
Because direct download links change often, search for: "Mortal Kombat X PPSSPP highly compressed" on trusted emulation forums like GBAtemp, CDRomance (archived), or Reddit’s r/EmulationOnAndroid.
If you still want to proceed with downloading, ensure you're using a reputable source and consider the following:
If you're interested in playing Mortal Kombat X: