|"Then let's get to work-zakenna!"|
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|Season||Smile Pretty Cure!|
|Home Place||Land of Picture Books|
|First Appearance||Smile Pretty Cure!: Ehon no Naka wa Minna Chiguhagu!|
|Theme Color||Indigo, Black|
|Japanese Voice Actor||Terasoma Masaki|
The Demon King (魔王 Maō?) is the main antagonist in Smile Pretty Cure!: Ehon no Naka wa Minna Chiguhagu! He is the villain of Nico's story and fights the Smile! Pretty Cure. He returns to his original form after being defeated by Ultra Cure Happy.