Yes, Geese in RBFFS and Alfred in RBFF2. Check the <a href="http://www.neo-geo.com/snk/dipcodes/dipcodes.html" target="_blank">Debug FAQ's</a>. You can fight against either by meeting certain conditions but need a debug chip or unibios to play as them.
I'm not sure that the RBFF2 page is completely correct about Alfred, it states that both dips 1-8 and 2-8 are required but I saw him picked using 2-8 alone.
Oh also, there are semi-hidden EX versions of some chars in RBFFS. And Alfred is playable on the Playstation Real Bout Dominated Mind (RBFFS).
<small>[ April 01, 2003, 03:23 PM: Message edited by: neojedi ]</small>