Game Boy Color Game Link Cable

After the Game Boy Pocket came the Game Boy Light (a backlit Game Boy Pocket only released in Japan), and the Game Boy Color, all share the same link cable port design, and Game Boy Color games and original Game Boy games can both use a second generation cable. Therefore, the Game Boy Color is compatible with the MGB-008 and MGB-010. Despite this, the Game Boy Color did receive its own designated link cable, the Game Boy Color Game Link Cable (model CGB-003) however it was no different functionally than the MGB-008.

Source: Wikipedia, "Game Link Cable", available under the CC-BY-SA License.