When I still lived in Fremont, we often went to this arcade in Milpitas, the name escapes me... it was medieval-themed. They had a pretty good-size arcade there, and there's one game that I remember... it was called SegaSonic Arcade.
I've done some research on the game, and most people claim that it never saw an American release, or it was on display at a convention and that was it. I doubt these people took into consideration the idea of Japanese importing, because I remember playing that game a few times.
You can do the research yourself, but it's the first Sonic arcade game, where he, along with Ray the Squirrel and Mighty the Armadillo (from Chaotix) are running away from lots of things and trying not to fall into lava and step on spikes. It's pretty much the usual sonic formula, only it's at a 3/4 perspective and uses a trackball. I wish I payed a bit more attention to it when I played it, but I was only about 5 years old, so meh.
There's a miniscule chance that the arcade may still have it. If so, that'd simply be awesome if I could get my hands on it, since there are only protoype ROMs out there...