If you want the Mortal Kombat vs DC Universe experience—complete with the awkward "Rage" mechanic and the T-rated fatalities—download PPSSPP and find the Mortal Kombat: Unchained ROM with the DC character mod. Play it with a physical controller attached to your Android.
For the smoothest experience on a mobile device, use these general configuration tips: mortal kombat vs dc universe android best
If emulation feels too complex, you can get your DC and MK fix through official Google Play Store titles: If you want the Mortal Kombat vs DC
For players seeking a dedicated "Mortal Kombat vs. DC" experience without the heavy hardware demands of a PS3 emulator, fan-made versions exist: fan-made versions exist: