Stitch! S02E12 - Infiltrating Yuuna's Dreams!

Because her mother died when she was a baby, Yuna does not remember her face. On a certain night, Stitch finds out, and Experiment 276 (Remmy) entered Yuna's dreams and turns it into a nightmare. Stitch, Jumba, and Pleakley rush after 276 to get Remmy out and save Yuna. Ultimately, Remmy is captured and he allows Yuna to see her mother's face.