Can a Game Boy Color Game Fit on a microSD Card?

Yes, the ROM file fits easily—GBC games are 512 KB–2 MB; any microSD holds thousands. But you cannot play directly from the card in a real GBC.

What You Need to Play

• Flash cartridge (e.g., EverDrive-GB X7, EZ-Flash Junior) – loads ROMs from microSD into real GBC/GBA hardware.
• Emulator + device – phone, PC, handheld (Retroid, Anbernic, etc.) runs the ROM from microSD.

Analogy

A GBC cartridge is a DVD; the microSD is a hard drive with the ISO. You still need a DVD player (flash cart or emulator) to "play" it.

Legal note: Only use ROMs you dumped from your own carts.