To perform this move where you make a frozen copy of Sub-Zero which freezes an opponent if they walk into it or touch it press Down, Away, B (like ALL the other Mortal Kombat Kombos this must be done quickly). This move does not work with the unlockable Classic Sub-Zero.
At the 'Ultimate Kombat Kode' screen enter one of the following codes to enable the corresponding effect. The numbers indicate the number of times you need to tap an icon in a particular position to change it. To access the 'Ultimate Kombat Kode' screen select not to continue after a defeat. Scorpion's Lair will be replaced by the 'Scislac Busirez' stage (Ermac's Portal or The Lost World).
If you want to challenge yourself then at the 'Character Select' screen hold 'Up' and press 'Start' on the following characters (depending on what player you are) to get a random character to use in the game.
Player-1: Hold 'Up' and press 'Start' on Kitana.
Player-2: Hold 'Up' and press 'Start' on Scorpion.
To unlock this former member of the Lin Kuei clan select Robo Smoke and just before the battle begins press and hold Block + Run + High Punch + High Kick + Back. If you have entered the code correctly you will see smoke flaming into Human Smoke.