Stumbled across a Youtube video of this the other day, the cart is labeled "Street Fighter Zero 2000" (and also 64m..... yeah right). The full title screen displays "Street Fighter EX Zero 2000: Champion Edition".
The guy doesn't actually play the game, he just lets it run through the demo for about a minute. It doesn't have the Capcom or Sega logos nor does it have the skyscraper intro. My first reaction was that it was just another hack of the Turbo beta like SF III: 18 People. However once the title screen fades out it shows Ryu's bio in Japanese, which the beta does not have and could only be taken from the commercial release of the Japanese Special Champion Edition (or SFII' Plus as it's named in Japan).
Because he never played the game it's impossible to tell what's been changed gameplay-wise. The title screen also has a copyright date of 1999-2000 and from the condition of the cart it looks brand new.
Has anyone ever seen or heard anything about this? I have an unhealthy obsession with SFII and I'm intrigued to find out if this is something beyond a crappy title screen hack.