Game Boy Advance SP
The Game Boy Advance SP was an upgraded version of the original GBA. It featured a new design, with a clamshell style and front-lit screen. It also came with a rechargeable battery, rather than requiring AA's. The only major drawback was the absence of a headphone jack. The "SP" stands for "Special".
Game Boy Micro
The Game Boy Micro is the third design of the GBA. At a size of only four inches wide, two inches tall, less than an inch deep, and a weight of 2.8 ounces, it is smaller than any other system in the Game Boy line. It's screen is slightly smaller than that of the GBA and SP, but it maintains the same resolution. It is not backwards compatible. It comes with an adjustable backlight for playing in the dark.
There are 2 canceled games, Diddy Kong Pilot and Donkey Kong Coconut Crackers due to Rare joining Microsoft. The current games are DK: King of Swing and the remakes of Donkey Kong Country, Donkey Kong Country 2, and Donkey Kong Country 3.