Cheats for Mortal Kombat Advance (GBA)

Fight as Motaro:
Complete the game on the master difficulty setting. Begin a new game and highlight the unknown square at the character select screen to choose Motaro.

Fight as Shao Khan:
Complete the game on the supreme master difficulty setting. Begin a new game and highlight the unknown square at the character select screen to choose Shao Khan

Fight as Human Smoke:
Complete the game on the warrior difficulty setting. Begin a new game and highlight the unknown square at the character select screen to choose Human Smoke.