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Face blocks (or face Blocks) are objects that appear in New Super Mario Bros. They first start out as a single block with a face on it. Each time Mario hits the block, another face block pops out above the previous one, creating up to four face blocks piled on one another. This can help Mario reach higher platforms, enter horizontal pipes, or block enemies. However, if Mario takes too long, the blocks will collapse back into a single face block.
Face blocks return in Super Mario 3D Land, where they are spawned from ! Blocks. They have the same design, are often spawned in different paths, and allow Mario to access out-of-reach locations and collectibles, though they only appear for a period of time before they disappear.
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