Nintendo Campus Challenge is a special cartridge used in the event of the same name where players compete under a time limit to get a high score across 3 NES games; Super Mario Bros. 3, Pin Bot, and Dr. Mario. From November 1990 to December 1991, Nintendo held these competitions at universities in the United States and Canada. The winner from each campus won a trip to Walt Disney World in Orlando, Florida. The cartridge is considered to be even rarer than the Nintendo World Championships cartridge with only one known to exist.