CDRomance is a reputable emulation forum that provides pre-patched and compressed ISOs (CSO format). They often have the versions that remove bugs, restore uncensored fatalities (for EU versions), or include compatibility fixes for PPSSPP 1.17+. Search for "Mortal Kombat Armageddon (PSP) – CDRomance".
If you are looking for a native PSP experience for the PPSSPP emulator, is the game you want. What it is: A portable version of Mortal Kombat: Deception . Mortal Kombat Armageddon Ppsspp Iso File Download -UPDATED