Same character select:
Press A, B, A, B, A, B(2), A on controller two at the battle mode screen.

Alternate costume color:
Hold C when selecting a character.

Easy view of ending:
Set the difficulty level to two stars, then hold B + Up after defeating M. Bison.

Fast CPU battles:
Choose "Tournament" at the title screen. Highlight "End" at the tournament battle screen and press Start. All of the matches will be fought by CPU opponents. Press A to speed up the match.

Turbo mode:
Press Right(4) at the title screen.