As soon as SEGA appears, press A, B, B, A. You will hear a sound upon correct entry. You must start entering the code before the SEGA logo finishes fading in. After selecting 2 Players mode, after both players have selected their character, hold Start on Control Pad 1 and Control Pad 2. This menu allows you to adjust the controls, character strength, time, stage.
Level select (European version)
As soon as SEGA appears, press Up, Right, Down, Left, Up, Right, Down, Left, A, B, C. You will hear a sound upon correct entry. You must start entering the code before the SEGA logo finishes fading in.
Level select (North American version)
As soon as SEGA appears, press Left, Right, Left, Right, C, B. You will hear a sound upon correct entry. You must start entering the code before the SEGA logo finishes fading in.
Unused Cheat
As soon as SEGA appears, press Up 5 times, Down 5 times, Left, Right, Left, Right, A. You will hear a sound upon correct entry. You must start entering the code before the SEGA logo finishes fading in. However, this code has no known effect.