Heres a commercial game release for the Gameboy Colour, heres the release notes:

Airaki is a brand-new puzzle battle game for the Nintendo Gameboy! Work fast to beat all 8 bosses and become the champion. You must wisely choose 1 of 3 special skills that will help you in your journey. Already mastered the battle? Link up with another Gameboy to go head-to-head for countless more hours of fun! The game costs $15.00, excluding shipping.

via http://pdroms.de/gameboy/airaki-commercial-gbc-game