There is no official Mortal Kombat 9 (2011) release for the PSP; it was originally released for PlayStation 3, Xbox 360, and later PlayStation Vita. What you are looking for is typically a modded version of Mortal Kombat: Unchained—the only official MK title on PSP—re-skinned with MK9 textures, characters, and menus. Essential Download & Setup Details
The term "highly compressed" (e.g., claiming a 3GB game is shrunk to 300MB) is a common tactic used by unofficial sites that can lead to several issues:
Mortal Kombat 9 (MK2011) was a reboot of the franchise developed by NetherRealm Studios for PlayStation 3, Xbox 360, and PC. It utilized the Unreal Engine 3 to deliver high-definition graphics, complex physics, and X-ray moves.
Safety: Many "hot download" sites are known for bundling adware or malware. It is safer to look for community-trusted modding forums like those on YouTube or specialized emulation sites. Better Alternatives for Handheld Play
: Creators use high-resolution texture packs and save data to change character models (like Scorpion or Sub-Zero) to their MK9 versions. Compression