Scale Lift

Scales are platforms present in the Mario series. When a player lands on one platform, the parallel one rises. If the player lingers too long on one platform, the scale breaks apart.

Super Mario Bros.
Scales make their first appearance in Super Mario Bros., where they are the main gimmick of World 3-3.

Super Mario World
While scales themselves do not make an appearance in Super Mario World, a similar platform named Mushroom Scales appears. As other scales, landing on one part of the scale causes the other to rise, though the Mushroom Scale does not break.

New Super Mario Bros.
Scales reappear in New Super Mario Bros. in World 1-5. They behave the same way as the scales in Super Mario Bros.

New Super Mario Bros. Wii
Scales reappear in New Super Mario Bros. Wii, where they are the main gimmick of World 6-4. Unlike the scales in Super Mario Bros., enemies and other items affect the scales with the player.

New Super Mario Bros. U
Scales appear in New Super Mario Bros. U, where they are the main gimmick of Scaling the Mountainside. Unlike the scales in New Super Mario Bros. Wii, the scales reappear in a short while after breaking.