Move the extracted texture files into the PSP/TEXTURES/ folder within your PPSSPP directory to ensure the game looks like the MK9 mod, not the original PSP game.
A full guide on compatibility, emulation, file compression, legal issues, and safe downloading. Move the extracted texture files into the PSP/TEXTURES/
The short answer is . NetherRealm Studios and Warner Bros. Interactive Entertainment never officially released Mortal Kombat 9 (2011) for the Sony PSP. Move the extracted texture files into the PSP/TEXTURES/
Modders work within the engine limitations of the PSP to swap out older assets for newer ones. A typical patched ISO includes: Move the extracted texture files into the PSP/TEXTURES/