Cloud Block

A Cloud Block is a block mainly used as the ground for bonus areas above the ground. They first appeared in Super Mario Bros. in world 2-1, in the bonus area accessed by hitting the secret beanstalk halfway in the level. The cloud blocks in this game look similar to Lakitu's Cloud. When they appeared in Super Mario Maker, it was possible to destroy them with Thwomps, Bowser, or Skewers.

Super Mario Bros.
In Super Mario Bros., Cloud Blocks appeared in world 2-1, in the bonus area reached by hitting a Brick Block with a beanstalk.

Super Mario Bros. 3
In Super Mario Bros. 3, Cloud Blocks appeared in world 1-1, appearing in the bonus area reached by flying to the top of the level with a Super Leaf. Mario can pass through from the bottom.

Super Mario World
In Super Mario World, Cloud Blocks appeared in Yoshi's Island 1, where it was used to transport a 1-Up Mushroom to Mario or Luigi. Mario can pass through these from the bottom, such as in Super Mario Bros. 3.

Super Mario Maker
In Super Mario Maker, Cloud Blocks had to get a new sprite for the New Super Mario Bros. U game style. Cloud Blocks can be destroyed by, Thwomps, Bowser in Super Mario Bros. 3, and Skewers.