2) invaded the land and used the dream machine to make nightmarish monsters. One day, a mischievous being named Mamu (whose name was changed to Wart for Super Mario Bros. Because of this, the Muu citizens invented a dream machine so they could always have good dreams. The book's story tells of the dream world of Muu, where the quality of dreams determined the quality of the weather the next day. 3 Differences between Yume Kōjō: Doki Doki Panic and Super Mario Bros.
