Drag & Drop onto your Desktop, or the standard “Save Image As” method. Either works.
Much better. Always preferred the ORAS sprites to the RSE ones.
Though in the defense of the Insurgence Devs, that is how the Red and Blue Orbs looked in the original games, so they’re technically both accurate. They really were just recolors of the same sprite (and the Jade Orb was a recolor of them, not the other way around).