On May 20th you’ll not only be able to pick up a copy Mario Tennis Open, but purchase a “Midnight Purple” Nintendo 3DS. This isn’t the first or last time that we’ll probably see a new color option for the Nintendo 3DS. It joins 4 other colors that include Cosmo Black, Aqua Blue, Flame Red and Pearl Pink. Needless to say, Nintendo releases the new colors when they want to promote sales of the gaming device, or like in this case, a game that is launching. So how much? You’ll be able to grab the grape flavored Nintendo 3DS for $169.99.