For the following characters to appear, press the corresponding buttons the indicated number of times after you lose in a one player game and do not continue.
Ultimate Mortal Kombat 3
|Classic Sub Zero||7,6,0,5,2,0|
To Play as Human Smoke:
For Player 1: After selecting the robot hold Left, High Punch, BLOCK, High Kick, & Run together until the actual fight scene.
For Player 2: Use the above code but substitute Right for the Left.
At the title screen (with the purple skeletons) press Up, Up, Right, Right, Left, Left, Down, Down. It will say 'excellent!' That's it!
For Lots of Stuff
At the title screen (with the purple skeletons) press: C, R, A, Z, Y, C, Y, R, A, X (CRAZYCYRAX) then on the kube, when the kube is on kombat, press up!
Thanks to Revolution reader Luiz Fernando Mendonca!