The gameboy micro plays The full library of Gameboy advance games as well as gbc and the original gb i believe but not the Ds,Apparently this system is being marketed towards more "image concious teens"....And the thing as per its name Is TINY with dimensions of a mrere 4 inches wide by 2 inches tall and 0.7 inches thick....To give you an idea of how incredibly tiny this is heres a preview of The GBM next to a PSP UMD game disc:
You may have seen the commercial where a girl in all pink and everything is pink all around her goes walking and then see's the all pink matching gbm and then it shows the same with all cammoflauge style with a matching gbm,This is clearly showing how they'll have a wide variety of styles and its not just various fancy sounding colors anymore,Now its actually prints and styles....