and Wally Wingert in the English dub. Dr. Riddles and Kido Dr. Riddles, known as in Japan, is an ex-surgeon who quit his career and isolated himself from the world after he failed to save his grandson during an operation. While in his house full of books, the Mamodo , romanized as Kedo by Viz Media in the manga, asks Riddles if he would help him become the Mamodo King. Reminded of his grandson, Riddles decides to help Kido and leaves his isolation. During the course of the Mamodo Battle, Dr. Riddles's high intelligence allowed him to unravel the mystery of the Mamodo Books, information he shared with others whom he deemed good. In addition, Dr. Riddles gained a group of super-powered individuals called the Majestic Twelve as his entourage. He informed Kiyo and his friends about the threat the Mamodo Zofis posed and organized a group of Mamodo to help them defeat him. Kido is a childish boy resembling a ventriloquist dummy wearing a graduation cap who is very gullible, believing any lie told by Riddles, who tells him he was kidding, eliciting shocked reactions from Kido. During the infiltration of Zofis' base, Kido's book is burned whilst defeating Belgim EO. Dr. Riddles continued to help Kiyo afterwards. Kido's spells involve changing his body into weapons and his strongest spells allow him to create a giant mechanical goddess. Dr. Riddles is voiced by Rokuro Naya in the Japanese version, and Quinton Flynn in the English dub. Kido is voiced by Akemi Okamura in the Japanese version, and Brianne Siddall in the English dub. Uri and Penny Uri, known as in Japan, is the partner of the Mamodo Penny, known as in Japan. Uri is a poor man who cooperated with Penny in order to steal food for his family. At the end of the series, Uri has a stable job as a chef. Penny resembles a young girl who has an obsessive love with Zatch, who is fearful of her. When she discovers that Zatch does not remember her after losing his memory, she goes on an angry rampage and tries to defeat him and send him back to the Mamodo World and joins up with Zofis. Zofis gives her a number of brainwashed Mamodo to do her bidding. As the series progresses, Penny realizes the suffering Zofis causes and sacrifices her book in order to help Zatch defeat