Blockstepper

Blocksteppers are enemies first appearing in Super Mario 3D World. They are red blocks with feet and cornet-like mouths. They also wear brown soldier hats.

Super Mario 3D World
Blocksteppers appear in various levels, always marching in twos or more. They can be defeated by a single jump, scratch, tail whip, fireball, or other projectiles. However, defeating one from the group will make the others roam around frenetically, and after some time, they will begin to angrily chase after the player.