Hug tto! Precure♡Futari wa Precure Movie: All Stars Memories

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A vengeful teru teru bozu-like monster called Miden is stealing all of the Cures' magical powers and memories, turning them into helpless infants, barring Nagisa Misumi and Hana Nono. They must help the affected Cures to regain their abilities and fight off this new menace. (Source: Wikipedia)