Blurker

Blurkers are pink, squishy block-like enemies that appear in the Wii U game, Super Mario 3D World. They are introduced in World 2-3, Shadow-Play Alley. Blurkers appear in groups and primarily serve as guardians to secret passages. They can be defeated through use of a Mega Mushroom, a Potted Piranha Plant, or by the touch screen and microphone functions on the Wii U GamePad, although they will quickly re-spawn upon being defeated.