Series: Shugo Chara!
Episode Number: 42
English Title: Utau Hoshina! The Last Fight!
Romanji Title: Hoshina Utau! Saigo no Tatakai!
Kanji Title: ほしな歌唄! 最後の戦い!
Airdate: July 26, 2008
Directed by: Miho Hirao
Written by: Tomoko Koyama & Michiru Shimada
Preceeded by: Episode 041: True Self!
Followed by: Episode 043: Character Transformation! Amulet Dia!
Tadase tells Amu about his past with Utau and Ikuto. After that, all five Guardians confront Utau to put a stop to the Black Diamond Project. Kairi tells his sister that he can no longer stand her plans, so he will be siding with the Guardians. Utau transforms with Il while Amu transforms with El, however, Ikuto soon appears, preventing the other four guardians from interfering with Utau's and Amu's one-on-one battle. After Il is convinced by El to combine their powers to save Utau they both side with Amu, and Amu transforms with Il, becoming Amulet Devil. However, Utau, angry at Il's abandonment, character transforms with X-Dia, and unleashes her strongest power to defeat Amu. Though, shortly after, Amu is finally able to believe in herself so Dia returns to Amu and the X on her is lifted.
- First appearances of Character Transformation Amulet Devil; and the attacks "White Flag Double Plan," "Slash Claw", "Let's Go! Go! Little Duckies", "Devil's Tune" and "Glittering Particle".
- This is the last episode of Utau Hoshina transforming with Dia into Dark Jewel.
- This is the last and only episode of Amu transforming into Amulet Devil with Il.
- It has the most characters transformations.