I had never seen it here before, perhaps it was not released in a big way in Australia to begin with. Like we've both established, the game was purchased for the 'fun-factor', and that's what really counted here.
To the American SNES fans, if this cart didn't get a (US) release, really - do yourself a favour and import it.
I own close to 50 MVS carts, several CPSII boards, a Sega ST-V and almost every console, so don't take this advice lightly. I see a huge number of carts, for all systems, and I would say that for as far as multiplayer games go, this would be in my 'must-have' list along with 'Puzzle Bobble' and the 'Magical Drop' series.