Given that Mortal Kombat 11 is not a PSP game, it's not possible to directly download and play it on PPSSPP Android. The game's system requirements and compatibility are tailored for more advanced platforms like PlayStation 4, Xbox One, and PC (via Steam). Attempting to find a way to download Mortal Kombat 11 for PPSSPP Android, especially through Softonic or similar platforms, may lead to unofficial or pirated versions of the game.