Mr. Cheerful is the 43rd book in the Mr. Men series and the final one by Roger Hargreaves.
Mr. Clever appears under the titles Monsieur Malin (French), Don Inteligente (Spanish), Ο Κύριος Έξυπνος (Greek), 聰明先生 (Taiwan), 영리씨 (Korean), Unser Herr Schlaumeier (German), Bay Akýllý (Turkish).