There are other, better iterations of Mortal Kombat. Don't bother with this one.

User Rating: 2.1 | Mortal Kombat: Shinken Kourin Densetsu GB
The best way to describe this game is: BAD, with a capital B. Take everything you know and love about Mortal Kombat, throw it away, and put what's left on a Game Boy cartridge and this is the end result.

The graphics are pretty bad as you can probably imagine. The sprites are blurry, character movements are blocky at best, and they even move slowly.

Gameplay wise, its far worse that any of its console cousins. The collision detection is just plain broken. Some moves, like the uppercut, don't register properly and so there is a lag between the button press and the animation. Plus there is no blood, so forget about that. Sound is shabby as well. The music is in the wrong tone and the effects are indiscernible.

There is no value in coming back to this game either. No extra modes or options...nothing.

Pass on this one. In fact, just stay as far away as possible.