Gowin

Gowin was a publisher and developer of Game Boy and Game Boy Color games, game boy games, game boy advance and nokia games. Its earlier mono Game Boy games were developed by a team connected to Gamtec & Vast Fame, while its later Game Boy Color games were developed by Sintax in mainland China. They seem to have made games around 1997 - 2007.

Most of their mono games will only run on mono systems like the original Game Boy. But there are hacks to make them work on game boy player anyway.