Mega Man IV ROM Download for Gameboy (GB) on Emulator Games. Play Mega Man IV game that is available in the United States of America (USA) version only on this website. Mega Man IV is a Gameboy emulator game that you can download to your computer or play online within your browser. You can also download free ROMs such as Mega Man - Dr. Wily's Revenge, Star Trek - 25th Anniversary and Mega Man V as shown below. Mega Man IV works on all your devices in high quality.