Neo-Geo Forums

Hey guys last night I brought my supergun to my friends house and while I played the computer I kicked the hell out of them and it popped up a code, The only thing I remember seeing was a few UP's maybe a DOWN and the Button C. I was ukyo and it happened twice both times I was kicking the oppenents @ss and at the end of the round it popped up in the middle of the screen. Saying "Secret Code". If anyone knows this code and can give it to me, I would really appreciate it. I feel so pissed it went by so fast twice and I didnt get a chance to get it down.
Help please.