You cannot play true Mortal Kombat 11 on PPSSPP. But by following this guide, you can:
A standard modern game file takes up dozens of gigabytes. This highly compressed PSP ISO version reduces that footprint down to a few hundred megabytes, making it easy to download on limited data plans. Custom Audio and Intros You cannot play true Mortal Kombat 11 on PPSSPP
However, the reality of this request requires a deep dive into technical limitations, safety, and legitimate alternatives. The Truth About MK11 on PPSSPP You cannot play true Mortal Kombat 11 on PPSSPP
Features a massive roster and the "Konquest" adventure mode. You cannot play true Mortal Kombat 11 on PPSSPP