Thundercloud

From the Super Mario Wiki

This article is about the enemy in Super Mario Land 3: Wario Land. For information about the item in the Mario Kart series, see Thunder Cloud.

Thunderclouds appear in Super Mario Land 3: Wario Land. They are small clouds sporting an impish face that float above Wario. When they flash, they will drop lightning bolts down on him. They are invincible.