A GBC file is a ROM (Read-Only Memory) image of a Game Boy Color game. It contains a complete copy of the game's data, including the program code, graphics, and audio, extracted from the original game cartridge. These files are used with emulators, which are software programs that simulate the hardware of the Game Boy Color console on other devices like computers, smartphones, and tablets. Emulators allow users to play Game Boy Color games without needing the original console or cartridges. GBC files are typically created by dumping the contents of a physical game cartridge using specialized hardware and software. While using ROMs of games you own is generally considered acceptable, distributing or downloading ROMs of games you don't own may infringe on copyright laws. GBC files are essential for preserving and playing classic Game Boy Color games on modern devices.