Mortal Kombat Trilogy

Question mark menu:
Press Up, C, D, B at the options menu to display a question mark box, with quick finish, instant aggressor, and low damage options.

One button fatalities:
Enable the "Question mark menu" code. Turn on the quick finish option and press one of the following buttons when your prompted to finish your opponent.

A = Brutality
B = Fatality
C = Friendship
D = Babality

Fight as Ermac:
Press B, C, B(2), D at the character selection screen.

Fight as Noob Saibot:
Press D(2), C, D, B at the character selection screen. The screen will shake to confirm correct code entry.

Fight as Scorpion:
Press Up, Left, then hold Right for approximately five seconds at the character selection screen.

Fatalities:
To perform a fatality for any character, stand at any distance and press Forward(3), Down + Punch.

Brutalities:
To perform brutality for any character, press Forward(3), Down, A.

Babalities:
Start a match and do not block during the second or third rounds. Then, finish your opponent by pressing Back, Forward, Forward + Punch.

Moves:

Rain
Lightining: B, F, F, HP
Power Ball: D, F, P + BL

Rayden
Flying Dive: B, B, F
Electric Shock: D, F, P + BL

Kitana
Fan Throw: F, F, P + BL
Fly: D, B, P + BL
Friendship: B, F, F, P + BL

Reptile
Force ball: F, F, P + BL
Charge: B, F, F, LK

Mileena
Teleport Kick: F, F, LK
Sies: P + BL, P

Jade
Shadow Kick: D, F, LK
Throwing Stars: B, F, F, P
Stick Throw: B, F, P

Nightwolf
Hatchet uppercut: D, B, BL
Arrow: D, F, P + BL

Cyrax
Teleport: B, B, HK + LK
Ball Bombs: F, F, HK + LK

Sektor
Teleport uppercut: F, F, LK
Missile: F, D, B, P

Motaro
Special: F, F, P + BL
Tailslip: B, F, LK

Shao Khan
Hammer: D, F, Block
Shoulder Dash: D, F, P

Noob Saibot
Energy blast: LD, D, DR, R, BL

Moves Key:
B = backwards, F = forwards, U = up, D = down, P = punch, HK = high kick, LK = low kick, and BL = block.