Mario Tennis GB ROM Download for Gameboy Color (GBC) on Emulator Games. Play Mario Tennis GB game that is available in the United States of America (USA) version only on this website. Mario Tennis GB is a Gameboy Color 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. Deluxe (V1.1), Mario Tennis and Harvest Moon 3 GBC as shown below. Mario Tennis GB works on all your devices in high quality.