Sergeant Keroro: Kero 0
This is episode 0, the prequel to the main Keroro Gunsou anime series. KeroZero was shown in theaters with Keroro Gunsou Movie 4.
- Genre: Animation
- Studio:
- Keyword: prequel, short film
- Cast: Kumiko Watanabe, Etsuko Kozakura, Jouji Nakata, Takehito Koyasu, Takeshi Kusao