http://cgi.ebay.com/ws/eBayISAPI.dll...tem=3018109145
I'd like to think that I know my DC stuff, but I've never heard of this either as a commercial demo or homebrew...
ParaPara Paradise came out on PS2 (I believe), this is a mystery indeed: especially since Parapara is kinda old now!
^_^
And for those who don't know what Parapara is:
http://www.ddronline.net/parapara/pages.php?id=61