Unlock Smoke and Khameleon:
When you get a 'Game Over' screen and you are prompted to enter an 'Ultimate Kombat Kode' enter 113-840. The screen will begin to flash when the time runs up and the text 'Smoke and Khameleon are at your control' will appear and you will be able to select both characters.

Unlock Codes
To unlock the following effects enter the corresponding codes just before the battle where you put number codes with pictures.

985-125 - Psycho Kombat

444-444 - Randper Kombat

688-422 - Dark Kombat

040-404 - Real Kombat

109-901 - Bloody Kombat

300-300 - Silent Kombat

345-987 - Willy West Kombat

390-390 - Both Players Inflict 1/2 Damage

484-484 - Automatic Combos

788-322 - Fast Uppercut Recovery

543-345 - Kombat Zone: Living Forest

137-246 - Kombat Zone: The Pit Bottom

642-468 - You are entering the Land of Rellim

246-246 - You are entering the Outer Limits

033-000 - Player 1 Half Power

390-000 - Player 1 Inflicts 1/2 Damage

707-000 - Player 1 Quater Power

000-033 - Player 2 Half Power

000-390 - Player 2 Inflicts 1/2 Damage

000-707 - Player 2 Quarter Power

975-310 - Regenerating Power Bars

024-689 - Super Endurance

321-789 - Super Run Jumps

010-010 - Throwing Encouraged

044-440 - Unikoriv Referri: Sans Power

466-466 - Unlimited Run

987-123 - No Powerbars

555-556 - Special Moves Disabled

722-722 - Combo System Disabled

100-100 - Throwing disabled

020-020 - Blocking Disabled

Unlock Level Select:
Highlight Sonja at the Character Select screen and press Up + Start. When you have choosen the character you want to play you will be able to select which level you start on.

Unlock Secret Endurance Mode:
Highlight Kano at the Character Select Screen and press Down + Start.