Remove Energy Bars, Timers, and Sound - Go into the Options menu and press Start to return to the main menu. Repeat this process 27 times.

Same character in VS Mode - Press Down, R, Up, L, Y, B at the Capcom logo.

Unlockables

Configuration Screen - Hold the Select button while the world map is on the screen before a match begins. You will be able to change your controller configuration.

Extra endings - To get better endings, beat the game at the highest difficulty. Each character has a different ending, so you can have 8 different endings!

Extra Sounds - To listen to extra sounds on 1f to 23 on the Option Screen, go to sound 25, 26, or 27. Then rapidly press the R button. The new sounds should be there.

Get Full Character Profiles - Press and hold L and R on the second controller to see their profiles.