Sufami Turbo

The SuFami Turbo is an accessory for the Super Famicom, by Bandai, that has two proprietary cartridge slots. This was released in Japan only during 1996. Unlike the Aladdin Deck Enhancer this peripheral was actually licensed by Nintendo. The reason the peripheral has two cartridge slots is so that two different games can link together. The cartridges were also a lot cheaper than a standard Super Famicom cartridge, generally going for about ¥3980.