Keroro Gunso Episode 0 ／ Keroro Gunsou: Kero Zero - Shuppatsu da yo! Zen’in Shuugou!! ／ Keroro Gunsou: KeroZero Shupattsudayo! Zeninshuugou! ／ Keroro Gunsō: Kero Zero - Shuppatsu da yo! Zen’in Shūgō!! ／ ケロロ軍曹 ケロ0 出発だよ！全員集合！！ ／ ケロ０ 出発だよ！全員集合！！
Description
Episode 0 serves as a prequel to the main *Keroro Gunsou* series and was released theatrically alongside *Keroro Gunsou* Movie 4. On the day the Keroro Battalion departs Keron Planet for Earth, an enemy alien race attacks the Keron space station, where Giroro and Zeroro, who will later become Dororo, await Keroro’s arrival.
