Lil' Monster ROM Download for Gameboy Color (GBC) on Emulator Games. Play Lil' Monster game that is available in the United States of America (USA) version only on this website. Lil' Monster 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 Dragon Warrior Monsters, Dragon Warrior Monsters 2 - Cobi's Journey and Dragon Quest Monsters as shown below. Lil' Monster works on all your devices in high quality.