Ep. 20: Siren Pretends to Switch Sides After Hearing Evil Noise
Aired on July 3, 2011

20
Siren receives another opportunity to defeat the Pretty Cure. After listening to the evil noise, she feigns a change of allegiance. This deceptive maneuver is part of her latest plan to overcome her opponents. The narrative focuses on her attempt to regain trust by pretending to have switched sides, setting the stage for her next move against the heroes.
Episodes
- Ep. 16 · Best Friends Switching Places Nya♪
- Ep. 17 · Siren Disguises as Hibiki to Spread Sadness Before Maria's Departure
- Ep. 18 · Hummy Orders Hibiki and Kanade to Catch Invisible Notes While Aphrodite and Mephisto Decide on Travel
- Ep. 19 · Siren Disguises Herself as Hummy to Trap the PreCure Team
- Ep. 20 · Siren Pretends to Switch Sides After Hearing Evil Noise
- Ep. 21 · Mephisto attacks Kanon Town with Melody of Sorrow while Hummy endures torture
- Ep. 22 · Lala's Soulful Song Reveals the Identity of Cure Beat
- Ep. 23 · Zazan! A Tear is the World's Smallest Ocean!
- Ep. 24 · Hibiki and Kanade help Ellen repair a sand sculpture to preserve their friendship.