Nintendo e-Reader
The use of the Barcode Battler unit in conjunction with the Famicom was made possible using the Famicom-Barcode Battler interface – a connector cable that came with the "Barcode World" cassette. In this way, the Famicom was given the capacity to scan external barcodes to expand gameplay for the game to include all manner of household consumer products. Soon books were released by third parties that listed in detail which consumer products had the strongest barcodes. Today, the setup has been seen as a precursor to the 2001 Nintendo e-Reader for the Game Boy Advance. The two devices are very similar in that they serve the same purpose: to scan specially designed cards with barcodes imprinted on them as the primary means of using the device. The game continues to be played today often in emulated form, and modern emulators like FCEUX feature support specifically for the unusual "Barcode World" setup.