
Nintendo World Championship cartridges? Pfeh. They're a dime a dozen compared to... the PowerFest '94 cartridge, only one of which survives to this day. Well, that's what the guy trying to auction it for $25,000 says:
More details, including screenshots of the games on the cartridge (Super Mario Bros. The Lost Levels, Super Mario Kart, and Ken Griffey Baseball) are on the owner's web page.
Nintendo World Championship II [myebid]
