King Bills are gigantic Bullet Bills and may be the leaders of the Bullet Bills. King Bills first appeared in New Super Mario Bros. Wii on the secret World 9. They only appeared in World 9-8 where they tried to crush Mario. To get away from a King Bill, Mario had to use a Propeller Mushroom to fly over him or use a Mini Mushroom to duck under him. Unlike other Bullet Bills, as Mario moves around the screen, King Bills' eyes follow Mario around. Also unlike, a King Bill moves at the locations where Coins in Bullet Bill patterns is made (the patterns are so made that they count on facing direction and appearing location). Like the Banzai Bills in Super Mario World, they appear out of nowhere. King Bills are not found much in New Super Mario Bros. Wii.