Been playing Earthbound (SNES) with my girlfriend. I've played and beaten it many times - and I recommend it to everyone. Unfortunately, you won't be able to find it very easily. You can find a place to purchase it at at http://starmen.net if you're lucky - but it likely won't come cheap!
While we were playing, we brought up an interesting point: What the hell is Mr. Saturn? What happened in the design process that made Itoi come up with the concept of Mr. Saturn?