Zorori the Naughty Hero: The Secret of Double Z

映画かいけつゾロリ ZZ（ダブルゼット）のひみつ

Also known as Kaiketsu Zorori: The Secret of Double Z, ZORORI THE NAUGHTY HERO - The Secret of ZZ, 쾌걸 조로리: ZZ의 비밀, 쾌걸 조로리 : 더블제트의 비밀

One day, Zorori makes an alarm clock machine to wake up in time for free donuts. But something strange happens when Zorori reminisces about his mother and sheds a tear. They see scenes flash by and the ZZ mark on his costume disappears! Zorori treasures it incredibly as it was emboldened by his mother although he doesn't know its meaning. After crashlanding in the street, Zorori, Ishishi, and Noshishi are saved by a fashion design student whom Zorori later realizes is his mother. The alarm clock machine had become a time machine and sent them to the past. She and later Zorondo Ron, help the trio take back their time machine from the police and a kaijuu.