Divedrakes are minor enemies that appear either flying back and forth in a small area or flying all the way across the screen at various heights. In the Battletoads boss fight, as Shovel Knight lowers himself downward, avoiding obstacles, they will appear, and actually do dive at him, in a down-and-up attack pattern across the screen, a demonstration of their namesake.
Icedrakes are found in the Stranded Ship. They follow a similar swooping attack pattern, but are invulnerable everywhere except on their red tail and throat. Shovel Knight can Shovel Drop and bounce on its back to reach new heights.