@@Bloodreign1 If both players perform a roundhouse kick at the exact same time on The Soul Chamber stage a special secret stage is unlocked called Hells Gate. It's best to do it on a two player versus match.
At the screen that shows up when you first turn on the game hold Left + A. When the Williams screen appears, hold Right + B. When the (There is no knowledge that is not power) appears hold X + Y. If you did the kode right, you will see Smoke walk across the screen with the MK3 logo.