Whomp

Whomps are large gray, rectangular bricks with arms and feet with a face. They appear primarily in Whomp's Fortress. They attack by attempting to crush the player, and are defeated by being groundpounded while they are still on the ground. They have a boss variant known as King Whomp.

Wallman
Found in the files of Super Mario 64 is an earlier version of the Whomp known as a Wallman.