From the Super Mario Wiki
Retrieved from "https://www.mariowiki.com/index.php?title=Flip_Tile&oldid=2696828"
Flip Tiles are yellow platforms that appear in Super Mario Galaxy in the Toy Time Galaxy on the 8-bit Mario-Luigi planet as an obstacle. When stepped on, they start flipping downwards. They continue to turn indefinitely when they are triggered.
When the planet returns in Super Mario Galaxy 2, they are replaced by generic solid yellow blocks.