A King Bill is an enemy in New Super Mario Bros. Wii.

King Bills have beaten Banzai Bills in size. They are so big, they've nearly beaten Bowser in his gigantic form! King Bills take up nearly the entire screen. However, King Bills only appear in World 9-8 in World 9 (NSMB Wii). To unlock this world beat Bowser. They are the only Bullet Bills that smile. King Bills destroy everything in their path. Mario must go on the cloud platforms to avoid them. Players are warned when King Bills are incoming because they're coins that make the shape of a Bullet Bill. Mario must avoid going to high. He must use the clouds that enable him to jump high, but must stay under the stone blocks. At the end of the level, a King Bill chases Mario. Mario must reach the flagpole, before he gets hurt. King Bill Blasters are not seen. There are a total of 7 King Bills in New Super Mario Bros. Wii.