The PS Vita is not the same as the PSP. The PPSSPP emulator is for PSP games, not Vita games. So, can you play true MK9 on Android using PPSSPP?
Pro Tip: If you see "PPSSPP Gold Mod" online, avoid it. The developer deserves the $5 for creating the best emulator on the platform. -UPDATED- Download Mortal Kombat 9 Ppsspp For Android
But what if you don't own a PlayStation 3, Xbox 360, or a gaming PC? What if you want to play the blood-soaked story of the Tournament of Souls on your bus ride to work? The PS Vita is not the same as the PSP