The Emerald Star is the second Crystal Star found in Paper Mario: The Thousand-Year Door. It is located in The Great Tree as it was stolen by Lord Crump after the Puni Elder drove the X-Nauts out of the tree.
When Mario obtains this Crystal Star, he will learn the move Clock Out. At the cost of two SP, the player will have to repeatedly press the buttons that appear on the opponents side of the field. When it is done right, the enemies will not be able to move for a few turns. The buttons will also change at random intervals and could freeze Mario and his partner. The audience could also be frozen if it is neither on Mario or the enemies side.
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