If you want a legit copy of the Japanese SMB2, please realize that you'll need a Famicom and Famicom Disk System to play it... those don't go for cheap. All of this is available on eBay; that's where I got mine. In fact, I got the original disk version, two pirate cartridge versions, and the GBA version. Also, you could get Super Mario Deluxe for GBC, which includes the game as an unlockable.