These are the moves for
Mortal Kombat 2. Only some of the special moves, and none of the finishing moves, are applicable to other MK games.
Special moves
Hat Toss: Back, Forward, Low Punch (can be steered by pressing Up or Down during flight)
Teleport: Down, Up
Diving Kick: While in mid-air, press Down and High Kick simultaneously
Spinning Forcefield: Hold Block, press Up, Up, release Block, and press Low Kick
Finishing Moves
Bilateral Slice: Standing about two steps away: Hold Block, press Forward, Forward, Forward, release Block, Low Kick
Decapitation: From across the screen, hold Low Punch, press Back, Back, Forward, release Low Punch, then steer the hat so that it hits the enemy's neck.
Babality*: Back, Back, Forward, Forward, High Kick
Friendship* (Disco dance): Forward, Back, Back, Back, Low Kick
Acid Pool: Hold Low Punch and Low Kick, then approach the victim and press Down and High Punch
Kombat Tomb/Pit II: Forward, Forward, Forward, High Punch
* Of course, you cannot do a babality or friendship if you've done any punching during the winning round