Play as Bosses
Shao Khan
When on the Pit 3 or Rooftop stage hold Down+HP+LP.

Motaro
When on either Jade's Desert, Khan's Tower, or The Wasteland, hold Back+HK+LK.
(These only last for one round.)

Play as Chameleon
On the Story Line screen, press C-Right, C-Up, A, B, C-Down, C-Down, C-Up, C-Right.

Blue ?
On the Story Line screen, press C-Down, B, then A.

UKK Screen
On the Story Line screen, rotate the Analog Stick in a 360 degree motion.

Red ?
When the Story Line screen appears press C-Up, C-Right, C-Down, A, B, B, B, A, then A. If you did this correctly, you'll here Shao Khan say, "Outstanding!" Now press Start to do to the Option Screen.

Free play
At the Story Line screen press Down, Down, Up, Up, Right, Right, Left, then Left.

Stage Select
On the Character Select Screen, highlight Sonya and press and hold Start then press Up. If you did this correctly, you'll here a low explosion sound.

Fight Chameleon
On the Character Select Screen highlight Kano and press Down+Start. Now select your character and go to the Champion Tower. There you'll find a lot of endurance matches. The first fighter will be Chameleon.

Endurance Mode
Go to Kano on the Character Select screen. Press Down and Start. When done correctly, the screen will shake. When you choose a difficulty, you will have all endurances.

Reverse Babality
Do a babality, then before your opponent exploded, hold HP, LP, HK, + LK. Your opponent will return to normal size and then explode.

Play as Smoke
For Player One, hold LEFT, HP, HK, BLOCK, RUN.
For Player Two, hold RIGHT, HP, HK, BLOCK, RUN.

Get all Three ?
On the story screen press: C-Up, C-Right, C-Down, A, B, B, B, A, and A. You will hear an OOHH like in the Dead Pool and you will have all 3 ?.

Random Character Select
Highlight either Noob Saibot or Rain and then press Up and Start.

Numeric Codes
At the Vs. Screen, enter in the following codes. The first of the three digit number refers to how many times to press C-LEFT, the middle digit refers to how many times to press C-UP, and the last digit refers to how many times to press C-RIGHT. Both players should enter their respective codes at the same time.