If you’re looking for a DS paint application that turns your system into a digital sketchbook, look no furthur than Colors! Best of all, the only components you need are a “DS-compatible flash cartridge and a microSD card.” Video after the break. Click here to view a few masterpieces painted in this program.
Colors is a fairly basic (no layers or undo yet) but still impressive paint app, and more features, like DS-to-DS collaborative painting, are coming. You can use a full-size Wacom stylus if the DS one cramps your style, and export via Wi-Fi or microSD.