From the Super Mario Wiki, the Mario encyclopedia
Not-Bottomless Holes are types of terrain found in almost every area in Paper Mario: The Origami King, mainly caused by Paper Macho Soldiers. They can be filled up by using confetti, with the amount needed to fix them depending on their size. If Mario falls into one, he loses seven HP. Not-Bottomless Holes work similarly to colorless spots from Paper Mario: Color Splash.
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