Mortal Kombat Shaolin Monks

At the 'Main' menu enter the following codes to unlock characters and modes 

Unlock Sub-Zero for Story mode:
Hold L2 and input Square, Up, Down, L1, L1, Up, Square. Then release L2.

Unlock Scorpion for Story mode:
Hold L2 and enter Square, Up, L1, R1, Left, Right, Square. Then release L2. 

Unlock Classic MKII mode:
Hold L2 and input Square, Up, Down, Left, Right, R2, Square. Then release L2

Scorpion in 'Story' mode:
Beat the game with Liu Kang

Sub-Zero for 'Single Player' mode:
Beat the game once with kung Lao 

Unlock Scorpion in Single Player/Ko-Op Mode

Hold L2 while inputing code and release at the end.
Square, Up, L1, R1, Left, Right, Square
If put in correctly a sound is heard afterwords.

Unlock Scorpion

At the main menu screen, press and hold L2, then enter square, up, L1, R1, left, right, square.

Unlock Kung Lao Fatalities (Story Mode):

Fatality 1 - Left, Up, Right, Right, Square

Fatality 2 (Body Slice) - Right, Right, Right, Right, Square

Fatality 3 (Mild Air Slice) - Up, Up, Up, Right, Square

Fatality 4 (Friendly Rabbit) - Up, Up, Up, Down, Square

Fatality 5 (Arm Cutter) - Left, Right, Left, Down, Square

Fatality 6 (Head Toss) - Left, Right, Left, Left, Square

Fatality 7 (Many Chops) - Up, Up, Left, Up, Square

Fatality 8 (Headache) - Up, Down, Up, Right, Square

Fatality 9 - Right, Right, Up, Up, Square

Mutality 1 (Tornado) - Up, Right, Down, Left, Triangle

Mutality 2 (Hat Control) - Left, Right, Right, Left, Triangle

Brutality 1 - Left, Left, Up, Up, Circle


Unlock Liu-Kang Fatalities (Story Mode):

Fatality 1 - Down, Left, Right, Up, Square

Fatality 2 (Shaolin Soccer)- Down, Left, Up, Right, Square

Fatality 3 (Bonebreaker Combo) - Left, Up, Up, Right, Square

Fatality 4 - Left, Right, Down, Down, Square

Fatality 5 (Flipping Uppercut) - Up, Right, Down, Left, Square

Fatality 6 (Dragon) - Down, Right, Left, Left, Square

Fatality 7 (Giant Stomp) - Left, Left, Left, Up, Square

Fatality 8 - Right, Up, Right, Up, Square

Mutality 1 (Fire Trails) - Up, Down, Up, Down, Triangle

Brutality 1 (Rage Mode) - Right, Up, Down, Down, Circle


Unlock Sub-Zero Fatalities (Story Mode):

Fatality 1 - Right, Down, Right, Right, Square

Fatality 2 - Left, Left, Down, Right, Square

Fatality 3: Right, Right, Down, Right, Square

Mutality 1: Up, Up, Down, Up, Triangle


Unlock Scorpion Fatalities (Story Mode):

Fatality 1 (Flame) - Up, Up, Down, Down, Square

Fatality 2 - Right, Down, Right, Right, Square

Mutality 1 (Raise Hell) - Down, Down, Down, Up, Triangle


Unlock Baraka Fatalities (VS Mode):

Fatality 1 (Blade Lift) - Down, Left, Right, Right, Square

Fatality 2 - Left, Left, Left, Left, Square


Unlock Johnny Cage Fatalities (VS Mode):

Fatality 1 (Torso Rip) - Down, Down, Right, Right, Square

Fatality 2 - Right, Right, Right, Right, Square


Unlock Kitana Fatalities (VS Mode):

Fatality 1 (Head Chop) - Left, Left, Right, Right, Square

Fatality 2 (Kiss of Death) - Right, Right, Right, Right, Square


Unlock Reptile Fatalities (VS Mode):

Fatality 1 (Hidden Eat) - Left, Right, Left, Down, Square

Fatality 2 (Hidden Chomp) - Left, Left, Left, Down, Square

Mortal Kombat II Fatalities

F - Forward
B - Backward
D - Down
U - Up
HP - High Punch
LP - Low Punch
HK - High Kick
LK - Low Kick
BL - Block
(Note: When a fatality contains 'Up', press Block to stay on the ground)

Sub-Zero
Fatality 1: F F D HK (Sweep) then F D F F HP (Close)
Fatality 2: (Hold LP) B B D F (Release LP) (One Screen Away)
Friendship: B B D HK
Babality: D B B HK
Stage: D F F BL

Scorpion
Fatality 1: U U HP (Two people distance)
Fatality 2: (Hold HP) F D F F F Release (Close)
Friendship: B B D HK
Babality: D B B HK
Stage: D F F BL

Baraka
Fatality 1: B B B B HP (Close and hold BL while inputting directions then release when you press HP)
Fatality 2: B F D F LP (Close)
Friendship: U U F F HK
Babality: F F F HK
Stage: F F D HK

Liu Kang
Fatality 1: D F B B HK (Close)
Fatality 2: Rotate D-Pad Counter-Clockwise from opponent (Close) (Hold BL)
Friendship: F B B B LK
Babality: D D F B LK
Stage: B F F LK

Kung Lao
Fatality 1: F F F LK (Sweep) 
Fatality 2: (Hold LP) B F Release (And control the hat) (One Screen Away)
Friendship: B B B D HK
Babality: B B F F HK
Stage: F F F HP

Mileena
Fatality 1: F B F LP (Close)
Fatality 2: Hold HK for 5 seconds and release (Close)
Friendship: D D D U HK
Babality: D D D HK
Stage: F D F LK

Kitana:
Fatality 1: BL BL BL HK (CLose)
Fatality 2: Hold LK F F D F Release (Close)
Friendship: D D D U LK 
Babality: D D D LK
Stage: F D F HK

JohnnyCage
Fatality 1: D D F F LP (Close)
Fatality 2: F F D U (Close) (Press D+LP+LK+BL to knock down 3 heads)
Friendship: D D D D HK
Babality: B B B HK
Stage: D D D HK

Reptile
Fatality 1: B B D LP (Jump distance)
Fatality 2: F F D HK (Close) (Perform while invisible)
Friendship: B B D LP
Babality: D B B LP
Stage: D D F F BL

Jax
Fatality 1: BL BL BL BL LP (Sweep)
Fatality 2: (Hold LP) F F F Release (One Step Away)
Friendship: D D U U LK
Babality: D U D U LK
Stage: U U D LK

Rayden
Fatality 1: Hold LK for 3 seconds release then quickly tap LK + BL (Close)
Fatality 2:Hold HP for 10 seconds then release (Close)
Friendship: D B F HK
Babality: D D U HK
Stage: U U U HP

Shang Tsung
Fatality 1: Hold HK for 2 seconds then release (Sweep)
Fatality 2: U D U LK (Close)
Fatality 3: Hold LP for 30 seconds then release (I Think Close)
Friendship: B B D F HK 
Babality: B F D HK
Stage: (Hold BL) D D U Release Down

Have a Lot of Fun with Mortal Kombat 2 
Dead Pool Fatality with everyone: Hold LK + LP and move to the opponent, then uppercut him/her.