Alternate Outfits in SF3:Third Strike
Select any character and beat the game with him/her. Initially, you'll have access to only 6 different colors. However, once you have beaten the game, you'll have access to 6 more colors for a total of 12. Hold start and press an attack button when you select your character to get the alternate outfits. This only works for characters that you've beaten the game with already.