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This film serves as a reboot to the anime series that will last until the 9th film Dr. Slump and Arale-chan: N-cha!! Trembling Heart of the Summer, before the Dr. Slump remake. The story retells the events of Arale Norimaki's creation and her battle with Dodongadon, which leads to the introduction of Dodongadon's mother Mamangadon. Though Gatchan is in the movie, its birth is not shown.