Mortal Kombat 2

All characters and modes:
Press B(2), C, Right, A, Left, A, Down, C, Right, A, Left, A, Down at the start menu. A new menu option will appear.
Information in this section was contributed by Darwin518.

Test mode:
Enter the options menu and highlight the "Done" selection. Press Left, Down, Left, Right, Down, Right, Left(2), Right(2). A "Test Mode" option will appear to confirm correct code entry.
Information in this section was contributed by AnDy2004CHS.

Fight against Jade:
You must be on the square before the "?" square. Defeat your opponent using only the D-pad and LK. Jade will be the next opponent. If done correctly, you will advance to the Blue Portal to fight Jade, an enhanced version of Kitana.
Information in this section was contributed by AnDy2004CHS.

Fight against Noob:
Win 25 consecutive matches in two player mode. The phrase "Incredible winning streak! A new warrior awaits you." will appear. You will advance to the Blue Portal to fight Noob, a shadow of a ninja that only uses the Spear as a special move.
Information in this section was contributed by AnDy2004CHS.

Fight against Smoke:
Execute Upper Cuts on the Red Portal stage until Dan Forden appears. Quickly press Up + Start to teleport to the Blue Portal (Goro's Lair) to fight Smoke (an enhanced version of Scorpion).
Information in this section was contributed by AnDy2004CHS.

Random fighter:
Hold Up and press Start at the character selection screen.

Monster programmer picture:
Enable the "Test mode" code. Every time you do an uppercut that normally causes Dan Forden to appear and say "Toasty" will instead display picture of him drawn by his 6 year old brother.
Information in this section was contributed by TurboVec.

Pong mini-game:
Win 250 consecutive matches.

Fergality:
Enable the "Test mode" code and set the background to "6" and enable the "Ooh Nasty" option. Select Rayden as your character. Win the match by pressing Away(3), Block.

More time to use fatalities:
Press Up(2), Left, Up, Down + Select at the character selection screen.

Hint: Baraka: Fatality:
When the "Finish Him" or "Finish Her" message appears, take one step away from your opponent. Then, press Away, Away + Punch. Note: This combo is for a three-button controller.
Information in this section was contributed by TheGameHHH692166.

Hint: Baraka: Head Slice fatality:
Note: This move requires a 6-button controller. Press Back(4), HP when close.
Information in this section was contributed by kornporn2000.

Hint: Baraka: Stab fatality:
Note: This move requires a 6-button controller. Press Back, Forward, Down, Forward, LP when close.
Information in this section was contributed by kornporn2000.

Hint: Jax: Head Pop fatality:
Note: This move requires a 6-button controller. Hold LP then press Forward(3) and release LP when close.
Information in this section was contributed by kornporn2000.

Hint: Jax: Arm Rip fatality:
Note: This move requires a 6-button controller. At two steps away, press BLK(4), LP.
Information in this section was contributed by kornporn2000.

Hint: Johnny Cage: Torso Rip fatality:
Note: This move requires a 6-button controller. Go in close and press Down(2), Forward(2), LP.
Information in this section was contributed by kornporn2000.

Hint: Johnny Cage: Head Pop fatality:
Note: This move requires a 6-button controller. Go in close and press Forward(2), Down, Up. (For three heads, when the screen goes dark hold Down + LP + LK).
Information in this section was contributed by kornporn2000 and Aaron Agopian.

Hint: Kitana: Fan Decapitation fatality:
Note: This move requires a 6-button controller. Stand close and press BLK(3), HK.
Information in this section was contributed by kornporn2000 and Randalls.

Hint: Kitana: Kiss Of Death fatality:
Note: This move requires a 6-button controller. Hold LK and press Forward(2), Down, Forward then release LK.
Information in this section was contributed by kornporn2000.

Hint: Kung Lao: Hat Slice fatality:
Note: This move requires a 6-button controller. Get five steps away and press Forward(4), LK.
Information in this section was contributed by kornporn2000.

Hint: Kung Lao: Head Slice fatality:
Note: This move requires a 6-button controller. Get a full screen distance and hold LP and press Back, Forward, then release LP.
Information in this section was contributed by kornporn2000.

Hint: Lui Kang: Cartwheel Uppercut fatality:
Note: This move requires a 6-button controller. Hold Block and rotate the D-pad in two full circles away from your opponent.
Information in this section was contributed by kornporn2000.

Hint: Lui Kang: Dragon fatality:
Note: This move requires a 6-button controller. Stand one step away and press Down, Forward, Back(2), HK.
Information in this section was contributed by kornporn2000 and Scfuller1.

Hint: Mileena: Sai Stab fatality:
Note: This move requires a 6-button controller. Go in close and press Forward, Back, Forward, LP.
Information in this section was contributed by kornporn2000.

Hint: Mileena: Bone Spit fatality:
Note: This move requires a 6-button controller. Hold HK for three seconds then release.
Information in this section was contributed by kornporn2000.

Hint: Mileena: Babality:
Note: This move requires a 6-button controller. Stand one step away when finishing your opponent, then press Down + C.
Information in this section was contributed by Bret and Travis McQuater.

Hint: Rayden: Uppercut fatality:
Note: This move requires a 6-button controller. Hold HP for ten seconds then release when close.
Information in this section was contributed by kornporn2000.

Hint: Rayden: Shock fatality:
Note: This move requires a 6-button controller. Hold LK for five seconds, stand close, release LK and then repeatedly and simultaneously press BLK + LK.
Information in this section was contributed by kornporn2000.

Hint: Reptile: Head Eat fatality:
Note: This move requires a 6-button controller. At half screen, press Back(2), Down, LP.
Information in this section was contributed by kornporn2000.

Hint: Reptile: Invisible Slice fatality:
Note: This move requires a 6-button controller. Press Up(2), Down, HP to turn invisible, then press Forward(2), Down, HK
Information in this section was contributed by kornporn2000.

Hint: Scorpion: Toasty fatality:
From anywhere, hold BLK and press Down(2), Up(2), release BLK, and press HP.
Information in this section was contributed by Aaron Agopian.

Hint: Scorpion: Cut opponent in half:
Hold C and walk up to your opponent to cut them in half.
Information in this section was contributed by Brettyo.

Hint: Scorpion: Spear Slice fatality:
Note: This move requires a 6-button controller. Hold HP, then press Down, Forward(3), then release HP when close.
Information in this section was contributed by kornporn2000.

Hint: Scorpion: Toasty From Sweep:
Note: This move requires a 6-button controller. Hold BLK then press Up(2), HP.
Information in this section was contributed by kornporn2000.

Hint: Scorpion: Toasty From Anywhere:
Note: This move requires a 6-button controller. Hold BLK, then press Down(2), Up(2), HP.
Information in this section was contributed by kornporn2000.

Hint: Shang Tsung: Inner Ear fatality:
Get within sweeping distance of opponent, then hold HK for three to five seconds. Release the button to execute Shang Tsung's Blow Up Fatality.
Information in this section was contributed by kornporn2000 and RobManM.

Hint: Shang Tsung: Kintaro Punch fatality:
Note: This move requires a 6-button controller. Hold Low Kick for the entire round (at least 25 seconds). When the "Finish Him" message appears, release Low Kick at a close distance.
Information in this section was contributed by kornporn2000 and Kornfan44.

Enable the one hit kill cheat in the test mode menu. In round two, hold HP for 30 seconds then hit the opponent while still holding the button. When the "Finish Him" message appears, move into sweep range and release HP.
Information in this section was contributed by Roo.

Hint: Shang Tsung: Soul Steal fatality:
Note: This move requires a 6-button controller. Take a step away from your opponent when the "Finish Him" message appears. Then, hold Block and press Up, Down, Up, Low Kick.
Information in this section was contributed by AndrewG and kornporn2000.

Hint: Sub-Zero: Deep Freeze fatality:
Note: This move requires a 6-button controller. For the freeze press Forward(2), Down, HK. For the punch press Forward, Down, Forward(2), HP.
Information in this section was contributed by kornporn2000.

Hint: Sub-Zero: Ice Ball fatality:
Note: This move requires a 6-button controller. Go a full screen distance then hold LP and press Back(2), Down, Forward then release LP.
Information in this section was contributed by kornporn2000.

Hint: Male ninjas: Stage fatality:
When in close, press Down, Forward(2), BLK.
Information in this section was contributed by Aaron Agopian.

Hint: Dead Pool fatality:
This fatality works for every selectable character in the game. It will only work on the Dead Pool stage. However, it works differently depending on the type of controller you are using. When using the standard controller, hold B + C, get close to your opponent, hold Down, then press A. When using the six-button controller, hold A + C, get close to your opponent, hold Down, then press X. Either way, your opponent will be knocked into the acid in the background and will float off of the screen as a skeleton.
Information in this section was contributed by Kevin Bender.

Hint: Fall off spikes:
Uppercut opponents onto spikes under BG 2, then hold Down + LP. They will fall off of the spikes.
Information in this section was contributed by MKIICage.

Hint: Ignored by CPU opponents:
When fighting against the CPU, jump and kick your opponent from a good distance away. Now, while your opponent is getting up, go back a few steps, then jump and kick your opponent again. For some reason, the CPU will not move or block, and will allow you to continue doing this. This is especially useful against cheap fighters like Baraka, Liu Kang, and Mileena.
Information in this section was contributed by Kevin Bender.

Glitch: The Spoiled Man:
Use the following trick to turn Shao Kahn into "The Spoiled Man". Enable the "Test mode" code, check off "No damage to player one", and select "Done". Fight to the finish with any character until you reach Shao Kahn. Defeat Shao Kahn in the first two matches. The game will tell you about the character used to defeat him. Then Shao Kahn will be a spoiled man and want another match. Hit him once, and he will stand there, acting as if he is going to blow up. Stand there until time is up. He will want another match. Defeat him in round five. Once you give him the last hit that kills him, the game will stop for a split second before the game over message appears.
Information in this section was contributed by Mike.

Glitch: Johnny Cage: Green ball:
Have both fighters at the extreme opposite sides of each other (backs against the wall and cannot move back any further). Then, continue to throw several consecutive high green ball attacks. Soon after, the "shadows" behind the green ball will disappear. Also, as an added effect, the shadow kick/uppercut will only have one shadow instead of several. This trick can also be done with Shang Tsung morphed as Johnny Cage. Note: This is best done with two controllers, so that the other fighter is just standing there. Also, when the other fighter is about to die, you will have unlimited fatality time. However, the game will have to be restarted, as you will not continue to the next match.
Information in this section was contributed by ThArIcAnPsYkO420.

Jade: Moves:
Note: This trick requires a Game Genie cartridge. Enable the following code: CCMT-BE76. In a two player game, player two will now be Jade.
Information in this section was contributed by Louie.

Fan Throw: Press Forward(2), A + X.

Kintaro: Moves:
Note: This trick requires a Game Genie cartridge. Enable the following code: BWMT-BE76. In a two player game, player two will now be Kintaro.
Information in this section was contributed by Louie.

Grab: Hold Start while your enemy is punching you.

Roar: Grab an enemy and rapidly tap A or C (or X or Z on a six-button controller); or keep holding Start.

Noob Saibot: Moves:
Note: This trick requires a Game Genie cartridge. Enable the following code: B8MT-BE76. In a two player game, player two will now be Noob Saibot.
Information in this section was contributed by Louie.

Clone Throw: Press Down, Back.

Smoke: Moves:
Note: This trick requires a Game Genie cartridge. Enable the following code: B4MT-BE76. In a two player game, player two will now be Smoke.
Information in this section was contributed by Louie.

Spear Throw: Press Down, Down/Back, Back. Note: Player one must hit you to make you reappear.