Thudd

Thudd is a grey rock-like enemy found in Kirby Canvas Curse. They are similar to the Mario enemy Thwomp, in the sense that they are both named for onomatopoeias for a heavy object falling.

Thudds attack by falling on Kirby. They cannot be defeated, because putting the stylus over them merely draws a line, which makes a Thudd more of an obstacle than an enemy. They are also notable for coming in three sizes.