The Short Bow is a bow in Golden Sun: Dark Dawn.
A Short Bow increases its wielder's Attack power by 11 points. Since they are not artifacts, they can be repeatedly bought at Patcher's Place and Carver's Camp for 300 coins each, and can be sold for 225 coins each. The Short Bow's only unleash is Double Shot, which is Jupiter-based and multiplies damage by 1.6.
This weapon is great for Karis early on the game, since the unleash is Jupiter-aligned, which will boost her lower attack power into something special. However, once the Magic Rod is available at Carver's Camp, which is stronger and an additional unleash. So once Carver's Camp is reached, Karis should upgrade to the magic rod.