The Gamate, produced by Bit Corporation of Taiwan, was perhaps the first attempt by a small company at fronting the Game Boy. And like all others, it was very far from a major success. It is also notorious for its blurry LCD screen and terrible speaker. But at least it has a somewhat decent library of over 70 games.
Note: despite the similar name, it is not at all related to the 3D Gamate by Vtech.