Dang, I though this was the coolest idea as a kid, especially since Sonic Battle had cool looking cards but you couldn't play with them like Yugioh. Still, could use A LOT more polish, and Shadow be acting like a drug addict.
Sad that this game got eaten by a virus. Sucks, but I don't blame you. Well, at least Sega announced that there releasing a Sonic TGC so there's that.