Costumes for the PC? What

So I’m playing earlier today and I’m fighting a Boxer, which is normal. But instead of seeing the default costume, I see his alternate America costume. Made me think, did Capcom already allow people to unlock costumes online? I didn’t notice any DLC, or uh, is it just people figuring out how to modify files and show them off online? Can anyone explain?

how about using the —>search<—

The question was asked in the SF4 PC thread. The question was answered in the SF4 PC thread. Then it was asked again. Then it was answered again. Then this thread was made.