Pokemon Diamond is an online GBC game that you can play at Emulator Online. This free Game Boy Color game is the United States of America region version for the USA. Pokemon Diamond is a single title from the many strategy games, rpg games and pokemon games offered for this console. If you enjoyed playing this, then you can find similar games in the gbc games category. Pokemon Diamond game is from the various retro games on the site, and there are more games like this, including Pokemon X and Y, Pokemon Diamond Version and Pokemon Fire Red Version.