Play as the old character:
Highlight Rayden, Jax, Kung Lao or Kano. While highlighted, press select. You can now play as the old characters.

Level Select:
To select your starting level in 1-player or Vs mode, highlight Sonya and pressing Up + Start.

Unlimited Credits:
Press Down, Down, Up, Up, Right, Right, Left, Left at the Story screen.

Chameleon Kode:
Choose any male ninja. Hold back (on D-pad) R1, R2, triangle, and square until character changes color.

Blue Question Mark Screen:
Hold down L1, L2, R1, R2, and up on the D-pad until the screen shakes.

Select Battle Arena:
At the character select screen, choose Sonya. Press up on the D pad and push the start button. The screen will shake and make a noise. After you select your fighter, you can choose your battle arena.

Fatalitie:
Enable One button fatalities from "?" menu.

Animality - Run
Babality - LP
Brutality - HP
Fatality 1 - HK
Fatality 2 - LK
Friendship - BL

? Kube:
Hold Up + R1 + R2 + L1 + L2 on the square labeled "Konfigure Kombat" in the Options menu. (A shaking screen confirms correct entry.) The ? menu will open, allowing the following options to be set.

One button fatalities - finish your opponent with one hit.
Instant aggressor - Aggressor meter will flash after one hit.
Normal boss damage - Bosses inflict the same amount of damage a normal fighter would inflict.
Low damage - Character sustains minimal damage from opponents attacks.
Health recovery - The health meter is gradually replenished with each hit.

Fatality award
After you win an 8-player game the game give you an award. Go to the last one and it should be a lot of fatalities.

Fireball Sucker Punch
Use this trick when playing as one of the Bosses that use a fireball and an uppercut (all but Motaro). This is a deadly tactic to use because the recovery time is so quick. Fire a fireball. This should lure your opponent into jumping. Then, just uppercut him.

Defeating Raiden
Start a one player game and select Sub-Zero (either version). Choose your destiny and fight your way to Raiden (if he is in the column you selected). Immediately after Shao Kahn says "Fight", freeze Raiden, then walk up and uppercut him. Just as he begins to teleport himself up, freeze him again. If timed correctly, Raiden should look like a stationery white blob. Then, uppercut him again. Repeat the process until he dies. Note: There are times when Raiden may dodge or block the freeze move. If this happens, wait for another chance to freeze him again.

Defeating Shao Kahn
Select Kintoro, then keep pressing [Down]x2, [Up]. You will go up in the air and slam on top of Shao Kahn. Alternately, select Motaro. Then, keep pressing [Back] [Circle]. Alternately, select Scorpion and keep pressing [Back]x2, [Square].

Pit fatality with one button fatalities enabled
Enable the "One button fatalities" code and disable blood. Enter a fight with someone in a background. Win two rounds, and hold [Down] + "High Punch" (uppercut). Note: You must hold down uppercut at sweep range. Your character will walk over to the opponent, elbow him first, then uppercut him. This works most of the time.

Pit fataility
Choose any character (except the Bosses). Enable the "Stage select" code then choose the Pit. Defeat your opponent in two rounds. Once the "Finish Him/Her" message appears, press [Up] and try to jump over your opponent. If done correctly, you should be facing the back of your opponent. Next, do an uppercut ([Down], [Square]). Your opponent will fall down and land on the Pit's spikes. Note: Use this technique only in the Pit; it will not work in other stages with backgrounds.

Glitch: Uppercut your opponent in the Pit while frozen
Select the Pit stage as classic Sub-Zero. When it gets to danger, use the freeze ([Down], [Forward], "Low Punch"), then uppercut into the pit. If timed correctly, your opponent will be still frozen in the ice in the pit.

Glitch: Smoke's Teleport Punch Decapitation fatality
Use Smoke (Human) and enable the "One Button Fatality" code. Try to get your opponent to the corner, then press [Circle]. Smoke will miss. His Teleport Punch will not decapitate the opponent, but will still count as a fatality.

Glitch: Cyber Ninja's voice change
Use any of the Three Cyber Ninjas (Cyrax, Sektor, or Smoke) in two player versus mode, Hit Your opponent with an uppercut and you will hear his strange new voice. This can also be done when facing one of the Cyber Ninjas in very hard champion mode.

Glitch: Cyrax fatality
At the "Finish Him" screen, do the Helicopter fatality. Oil will come out of the opponent, as opposed to red or green blood.

Glitch: Human Smoke Teleport fatality
When playing as Human Smoke, win two rounds and make sure your opponent is near the edge of the level. When it says "Finish him", do the teleporting smash fatality. When you do the fatality, you will miss but it will still count as a fatality.

Glitch: Sektor changes colors
Use any fighter (Sub-Zero recommended) and enable the "Stage select" and "One button fatality" code. Select The Pit stage. Finish Sektor off with a pit fatality ([Down], [Up], [Square]). Once Sektor falls in The Pit, he will change color. This will also happen if you use Sub-Zero's Icicle and Uppercut fatality.

Glitch: Shang Tsung automatically transforms
Select two on two mode and have players one and player two both choose Kitana. At the same time, have player one select Shang Tsung and player two select Cyrax. After that, Shang Tsung will appear glitched. At the fighting screen, Shang Tsung will be another character automatically (most likely Sub- Zero). Note: You must go to "Configure" in the options menu and set "Shang Tsung's Morph" to "No Morphs".

Glitch: Sub Zero fatality
Play as Sub Zero (Masked). Enable the one button fatality option and try to get your opponent in the corner. Once the "Finish Him/Her" message appears, press [Circle]. Sub Zero will uppercut your opponent, and if done correctly, the opponent will not land on the glacier but it will still count as a fatality.

Glitch: Sub Zero's scar
Have both players get Sub-Zero with his mask off in a two player battle. At the versus screenm Sub0Zero will have his scar both on the left and on the right.

Glitch: One-button false fatalities and animalities
Enable the one button fatalities option and attempt to use a finishing move that does not exist (such as Subzero's animality or Rayden's second normal fatality). One of two things will occur: For animalities, the screen goes into fatality mode, but the character does not do anything. Then, the word "animality" still appears. This may also work for friendships. The other outcome is that the move does not exist and will not work, such as Mortal Kombat 1 Rayden's second fatality. Also notice that brutalities do not always work with one button mode, yet you can start and complete a full brutality in that mode anyway.