The Daybreak appears as a new item, having to be assembled by collecting three parts, similar to the Dragoon. Once all parts are assembled, the character will be able to use a powerful beam. The character who holds it can shoot while moving forward and backward, as well as flicking the control stick to change directions.
A weapon of great and terrible power. The name Daybreak might sound pretty cheerful, but in truth this weapon is destructive enough to doom the world. Unable to be used until all three parts are assembled, it's best to keep this out of your opponent's hands...
3DS - Kid Icarus: Uprising (03/2012)
There is a glitch that gives infinite ammo to the Daybreak by doing the Nabbit glitch.