You can buy flashable game boy cartridges on Amazon: https://www.amazon.com/gameboy-flash-cartridge/s?k=gameboy+flash+cartridge https://www.amazon.com/gameboy-f

You can buy flashable game boy cartridges on Amazon: https://www.amazon.com/gameboy-flash-cartridge/s?k=gameboy+flash+cartridge https://www.amazon.com/gameboy-flash-cartridge/s?k=gameboy+f...