While not a PSP game, the PS Vita was Sony’s successor to the PSP. A port of MKX was announced but sadly canceled. However, PS Vita users can remote play the PS4 version of MKX.
The files labeled as "Mortal Kombat X PSP ISO" are almost always Total Conversion Mods Mortal Kombat: Unchained (the official PSP port of ). Modders use these base games to: Mortal Kombat X on Steam Storage: 44 GB available space.
: Almost all "MKX" mods for PSP are built on the Mortal Kombat: Unchained
Another Mortal Kombat game, Deadly Alliance, was released on PSP. It's an older game, but it might be available for download on PSP game repositories or online stores.