Keroro Gunso the Super Movie 3: Keroro vs. Keroro Great Sky Duel (2008)
Chō Gekijban Keroro Gunsō 3: Keroro Tai Keroro—Tenkū Dai Kessen de Arimasu! is the third anime movie based on the series Keroro Gunso produced by Sunrise.
More at Wikipedia.
Director: Susumu Yamaguchi
Distributor: TV Tokyo, NAS|Nihon Ad Systems, Sunrise
Release date: March 1, 2008
Running time: 1:47 (including 11-minute Warrior Kero)