The Whomp King is a character from the Mario series of video games. He is the King of all Whomps. He first appeared in Super Mario 64 as the boss of Whomp's Fortress.
Super Mario 64
He guards a Power Star given to him by Bowser, to make sure Mario doesn't rescue the princess. In this game he tries to crush Mario. Mario has to ground pound on him three times until he gives up the Power Star.
Super Mario Galaxy 2
He returns in Super Mario Galaxy 2 as the boss of Throwback Galaxy. He is bigger in this game, but is fought in the same way as in Super Mario 64. He also has new abilities. He can now create shockwaves when he hits the ground, he can also summon Whimps. He is once again beaten by Mario, who receives a Power Star.