actually if you have a PC, you should start MK3 exe with adding 666 after the file name, add 666 1000000 to get Shao Khan and Motaro too.

I think he was talking about the MAT2 version since he said so.

The code you have to enter is this:
10902 22234

I think you enter it after you lose to the comp and don't continue. Its been a few years since I did it.