A Drop Block (analogous to, and sometimes called, a Donut Lift from the Mario series) is a part usable in Brawl's Stage Builder. In Stage Builder, they are brown blocks with dark brown upside-down triangles on the sides. When stepped on for long enough by characters or items, these blocks shake, fall, and eventually reappear after a certain amount of seconds. They only drop when they are stood on, so it is possible to make one-way passages by sealing a narrow entry with a Drop Block. Interestingly, it is possible to Wall Cling to the side of a Drop Block without making it fall.
Drop Blocks also appear in certain levels of the Subspace Emissary. These Drop Blocks fall faster and are usually placed over a gap, spikes, or water and between a character and a target. These Drop Blocks do not reappear, except in Subspace (Part I), where they cover an extended area without ground), so one should be cautious with where they are standing or else he/she might end up restarting the stage.
- Donut Lifts, as mentioned, are what Drop Blocks are called in the Mario series. Such examples include Hop, Hop, Donut Lifts! from Super Mario World 2: Yoshi's Island, Rainbow Ride from Super Mario 64, and Gelato Beach secret levels from Super Mario Sunshine, the latter of which are made of sand, and disinegrate instead of falling.