Both sites offer "Mortal Kombat X – Mobile Edition" or "MKX – Legacy" which are under 500MB. Check user comments for active links.
Reduce resolution to 1x PSP, turn off "Post-Processing Shaders," and enable "Force Maximum FPS" (60). Both sites offer "Mortal Kombat X – Mobile
: Features the full Konquest (Story) mode, Puzzle Kombat, and Chess Kombat. Performance : The 1v1 fights run at a smooth even on older mobile devices using the PPSSPP emulator. Mortal Kombat X .iso Highly Compressed - Facebook turn off "Post-Processing Shaders
The most interesting feature of these fan projects is the , which brings elements from 2015's Mortal Kombat X to the 2006 PSP engine: Both sites offer "Mortal Kombat X – Mobile