Mario Bros (JU) ROM Download for Nintendo (NES) on Emulator Games. Play Mario Bros (JU) game that is available in the United States of America (USA) version only on this website. Mario Bros (JU) is a Nintendo emulator game that you can download to your computer or play online within your browser. You can also download free ROMs such as Super Mario Bros 3, Donkey Kong (JU) and Super Mario Bros as shown below. Mario Bros (JU) works on all your devices in high quality.