From the Super Mario Wiki
The Mushroom Library is a location in Mario Party Advance located in the Seaside Area of Shroom City. It features a wide selection of books which line the library's back wall in wooden bookshelves. In front of the diamond-patterned wallpaper and the bookshelves is a single wooden table with no chairs around it. The library is nearly dominated by one of its employees, Mechakoopa, who has installed himself at the table, surrounding himself in a messy pile of the library's books and filling the blackboard with his mathematical theories. When the player enters the library, they find him enraptured in one of the library's books, and talking to him leads to the Mathemagician! quest, which involves Mechakoopa quizzing the player with arithmetic questions; answering all of them correctly nets the player the Castle Night Gaddget.
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