Ninpuu Sentai Hurricaneger (2002)

S1E11 Scroll 11: The Dream Eater and Starting Anew

After their crushing defeat leaves the Hurricaneger unconscious, the team must venture into a dream world to rescue children trapped by a Jakanja Chuunin. The villain is dooming the kids with blissful, endless good dreams, luring them into a slumber from which they may never wake.