I have MKII (genesis) on an emulator and i've read about the "Spoiled Khan" and "Mad Khan" tricks where you make your player invincible and you make player 2 die in one hit and when you beat shao khan, he comes back and askes for another match, and another, and finally a 5th round and that's when he stays dead. But, whenever i do this, it never works. Anyone else heard of this and if so, did anyone get this to work?
In the options menu enable Test modes and then activate No damage to P1, 1 Hit Kills P2. Then choose background, for example 5. In the Battleplan choose 15 (the battle with Shao Kahn). Begin one player game and choose your fighter. You will go direct to the battle with the emperor. You will fight with him in the "Living Forest" Stage. After you kill him you will see your ending story as usually. After that the game will not over and the next round will begin, the third round against Shao Kahn. You can play only 5 rounds and after that the game will over. If you don't hit him at the beginning of the round, Shao Kahn will prepare to explode and the game will freeze. So you must wait to the end of the round when the "Game Over" screen will appear.