Hold down L & R buttons at Start & Options screen right before you press start to Start a game. This allows you to play a 2-player game with 4 characters in each round.
Type these in right when character select screen appears
Skip to Shao Kahn - right, up, up, right, left, Select
Skip to Kintaro - up, down, down, right, right, Select
Skip to Smoke - up, left, up, up, right, Select
Skip to Noob Saibot - left, up, down, down, right, Select
Skip to Jade - up, down, down, left, right, Select
30 Kredits - left, up, right, down, right, Select
Super Strength - down, up, right, up, left, Select
Double Fatality Time - up, up, left, up, down, Select
Note that in order to do a "Friendship" or a "Babality" you cannot punch
Dead Pool Fatality (for all characters) - Hold Low Punch and Low Kick while you uppercut the opponent.
Liu Kang
Standard Fireball - Toward, Toward, High Punch
Crouching Fireball - Toward, Toward, Low Punch
Flying Kick - Toward, Toward, High Kick
Bicycle Kick - Hold Low Kick for 5 seconds, then release
Fatality #1: Dragon - Down, Toward, Away, Away, High Kick
Fatality #2: Cart Wheel - Full circle Toward foe, starting from down arrow position and moving clockwise
Friendship - Toward, Away, Away, Away, Low Kick
Babality - Down, Down, Toward, Away, Low Kick
Pit II / Tomb Fatality - Away, Toward, Toward, Low Kick
Kung Lao
Hat Throw - Away, Toward, Low Punch
Teleport - Down, Up
Bullet Kick - Down+High Kick while jumping
Whirlwind Spin - Up, Up, Low Kick (keep tapping Low Kick to keep spinning)
Fatality #1: Chinese Slice - Toward, Toward, Toward, Low Kick
Fatality #2: Head Chop Hat Throw - Hold Low Punch, Away, Away, Toward, Release Low Punch, press Up once the hat's is about 2-3 steps away
Friendship - Away, Away, Away, Down, High Kick
Babality - Away, Away, Toward, Toward, High Kick
Pit II / Tomb Fatality - Toward, Toward, Toward, High Punch
Johnny Cage
Green Flame (Low) - Half Circle Away to Towards, Low Punch
Green Flame (High) - Half Circle Towards to Away, High Punch
Shadow Kick - Away, Toward, Low Kick
Shadow Uppercut - Away, Down, Away, High Punch
Low Blow (Split Punch) - Block+Low Punch
Fatality #1: Torso Pole - Down, Down, Toward, Toward, Low Punch
Fatality #2: Knock off one head (in close) - Toward, Toward, Down, Up
Fatality #3: Knock off three heads (in close) - Use Fatality #2, then when the fatality starts, Hold Down+Low Punch+Block+Low Kick
Friendship - Down, Down, Down, Down, High Kick
Babality - Away, Away, Away, High Kick
Pit II / Tomb Fatality - Down, Down, Down, High Kick
Reptile
Acid Spit - Toward, Toward, High Punch
Force Ball - Away, Away, High Punch+Low Punch
Invisibility - Hold Block, Up, Up, Down, Release Block, High Punch
Slide - Away+Block+Low Punch+Low Kick
Fatality #1: Tongue (across the screen from opponent) - Away, Away, Down, Low Punch
Fatality #2: Invisible Slice (in close) - Use the "Invisibility" move then press Toward, Toward, Down, Toward, High Kick
Friendship - Away, Away, Down, High Kick
Babality - Down, Away, Away, High Kick
Pit II / Tomb Fatality - Down, Toward, Toward, Block
Sub-Zero
Deep Freeze - Down to Towards, Low Punch
Ground Freeze - Down to Away, Low Kick
Slide - Away+Block+Low Punch+Low Kick
Fatality #1: Ice Grenade (across the screen from opponent) - Hold Low Punch Away, Away, Down., Toward, Release Low Punch
Fatality #2: Freeze and Crumble - Start from 3-4 steps away from opponent press Toward, Toward, Down, High Kick (this should freeze the opponent, then in close press Toward, Toward, Down, Toward, High Punch
Friendship - Away, Away, Down, High Kick
Babality - Down, Away, Away, High Kick
Pit II / Tomb Fatality - Down, Toward, Toward, Block
Shang Tsung
One Flame - Away, Away, High Punch
Two Flames - Away, Away, Toward, High Punch
Three Flames - Away, Away, Toward, Toward, High Punch
Morph to Liu Kang - Away, Toward, Toward, Block
Morph to Kung Lao - Away, Down, Away, High Kick
Morph to Johnny Cage - Away, Away, Down, Low Punch
Morph to Reptile - Block+Up, Down+High Punch
Morph to Sub-Zero - Toward, Down, Toward, High Punch
Morph to Kitana - Block, Block, Block
Morph to Jax - Down, Toward, Away, High Kick
Morph to Mileena - Hold High Punch for 2 seconds then release
Morph to Baraka - Down, Down, Low Kick
Morph to Scorpion - Hold Block and press Up, Up
Morph to Rayden - Down, Away, Toward, Low Kick
Fatality #1: Soul Sucker - Hold Block and press Up, Down, Up, Release Block, Low Kick
Fatality #2: Inner-Ear - Hold High Kick for 3 sec. then release
Fatality #3: Kintaro Morph - Win one round then on the next round, hold Low Punch for the whole round and if you win the round then once it says "Finish Him" then make sure that your about 2 steps away from the opponent then release Low Punch.
Friendship - Away, Away, Down, Toward, High Kick
Babality - Away, Toward, Down, High Kick
Pit II / Tomb Fatality - Hold Block and press Down, Down, Up, release Block, Down
Kitana
Fan Swipe - High Punch+Away
Fan Throw - Toward, Toward, High Punch+Low Punch
Fan Lift - Away, Away, Away, High Punch
Square Wave Punch - Half Circle Towards to Away, High Punch
Fatality #1: Kiss of Death - Hold Low Kick and press Toward, Toward, Down, Toward, Release Low Kick
Fatality #2: Head Chop - Block, Block, Block, High Kick
Friendship - Down, Down, Down, Up, Low Kick
Babality - Down, Down, Down, Low Kick
Pit II / Tomb Fatality - Toward, Down, Toward, High Kick
Jax
Ground Pound - Hold Low Kick for 3 seconds, then release.
Grab - Toward, Toward, Low Punch (keep pressing Low Punch for more punches)
Sonic Wave - Half Circle Toward to Away, High Kick
Backbreaker - Block, while in air with opponent
Multiple Throws - Once you start to throw your opponent, keep pressing High Punch
Fatality #1: Head Pop - Hold Low Punch, press Toward, Toward, Toward, Toward, Release
Fatality #2:Arm rip - Block, Block, Block, Block, Low Punch
Friendship - Down, Down, Up, Up, Low Kick
Babality - Down, Up, Down, Up, Low Kick
Pit II / Tomb Fatality - Up, Up, Down, Low Kick
Mileena
Teleport Kick - Toward, Toward, Low Kick
Roll Attack - Away, Away, Down, High Kick
Sai Throw - Hold High Punch for 2 seconds then release
Fatality #1: Sai Stab - Toward, Away, Toward, Low Punch
Fatality #2: Suck up opponent and spit out bones - Go up to opponent, Hold Block and press High Kick
Friendship - Down, Down, Down, Up, High Kick
Babality - Down, Down, Down, High Kick
Pit II / Tomb Fatality - Toward, Down, Toward, Low Kick
Baraka
Blade Swipe - Away+High Punch
Blade Spark - Down to Away, High Punch
Blade Fury - Away, Away, Away, Low Punch
Double Kick - Tap High Kick 3 times when close to opponent
Fatality #1: Head chop - Away, Away, Away, High Punch
Fatality #2: Blade to heart - Away, Forward, Down, Forward, Low Punch
Friendship - Up, Toward, Toward, High Kick
Babality - Toward, Toward, Toward, High Kick
Pit II / Tomb Fatality - Toward, Toward, Down, High Kick
Scorpion
Spear - Away, Away, Low Punch
Teleport Punch (Decoy) - Down to Away, High Punch
Scissor Takedown - Toward to Away, Low Kick
Air Throw - Block, while in air with opponent
Fatality #1: Toasty! - Down, Down, Up, Up, High Punch
Fatality #2 - Double Slice - Hold High Punch, press Down, Toward, Toward, Toward, Release
Friendship - Away, Away, Down, High Kick
Babality - Down, Away, Away, High Kick
Pit II / Tomb Fatality - Down, Toward, Toward, Block
Rayden
Lightning Bolt - Down to Toward, Low Punch
Flying Thunderbolt - Away, Away, Toward
Teleport - Down, Up
Shock - Hold High Punch for 5 seconds, then release when standing next to opponent
Fatality #1: Shock and blow up - Hold High Kick 3-5 sec, go close to opponent, release, keep pressing Block+Low Kick
Fatality #2: Explosion Uppercut - Hold High Punch for whole round, go up to opponent, release
Friendship - Down, Away, Toward+High Kick
Babality - Down, Down, Up+High Kick
Pit II / Tomb Fatality - Up, Up, Up, High Punch
1 C2C4-47AA Infinite continues 2 DF8C-CDDA Start with 0 continues 3 D78C-CDDA Start with 2 continues 4 D58C-CDDA Start with 6 continues 5 DB8C-CDDA Start with 8 continues 6 C2B1-14F7 Player 1 is invincible 7 DDB5-1FF7 Player 2 or computer is killed by one hit 8 C2B5-14F7 Player 2 or computer is invincible 9 DDB1-1FF7 Player 1 is killed by one hit 10 622B-C7AC Disable throws--2-player mode 11 6DC7-1DAA Infinite time CODES 12 THRU 28: 1-PLAYER ONLY, CAN'T SEE ENDING 12 CBC6-3D6E + DDC6-3DAE Always fight Kung Lao 13 CBC6-3D6E + DFC6-3DAE Always fight Lui Kang 14 CBC6-3D6E + D4C6-3DAE Always fight Cage 15 CBC6-3D6E + D7C6-3DAE Always fight Baraka 16 CBC6-3D6E + D0C6-3DAE Always fight Kitana 17 CBC6-3D6E + D9C6-3DAE Always fight Mileena 18 CBC6-3D6E + D1C6-3DAE Always fight Shang Tsung 19 CBC6-3D6E + D5C6-3DAE Always fight Rayden 20 CBC6-3D6E + D6C6-3DAE Always fight Sub-Zero 21 CBC6-3D6E + DBC6-3DAE Always fight Reptile 22 CBC6-3D6E + DCC6-3DAE Always fight Scorpion 23 CBC6-3D6E + D8C6-3DAE Always fight Jax 24 CBC6-3D6E + DAC6-3DAE Always fight Kintaro 25 CBC6-3D6E + D2C6-3DAE Always fight Shao Kahn 26 CBC6-3D6E + D3C6-3DAE Always fight Smoke 27 CBC6-3D6E + DEC6-3DAE Always fight Noob Saibot 28 CBC6-3D6E + FDC6-3DAE Always fight Jade 29 06E1-17D4 Mileena's Sai Throw does massive damage 30 06E9-1DD7 Liu Kang's High Fireball does massive damage 31 06E2-1767 Kung Lao's Hat Throw does massive damage 32 06EF-4767 Cage's Shadow Kick does massive damage 33 06EB-17AF Reptile's Force Ball does massive damage 34 06E0-4FA4 Shang Tsung's Flaming Skull attack does massive damage 35 06E9-17A4 Kitana's Fan Throw does massive damage 36 06EE-C4A4 Baraka's Blade Spark does massive damage 37 06E4-34DF Rayden's Lightning Bolt does massive damage