Keroro Gunso the Super Movie 4: Gekishin Dragon Warriors

Keroro Gunso the Super Movie 4: Gekishin Dragon Warriors (超劇場版ケロロ軍曹 撃侵ドラゴンウォリアーズであります!) is the fourth film made from the popular anime series Sgt. Frog. The film was released on March 7, 2009, in Japanese theatres. It was produced by Sunrise, the studio behind the anime television series. The film later got released to DVD on July 24, 2009, in Japan.

Plot
Mysterious giant beings called "Ryū no Shippo" (Dragon Tails) appeared across the world. Due to the danger it could bring, the Keroro Platoon did a worldwide research on the Dragon Tails, but Tamama suddenly disappeared during the research. Because of this, the whole platoon started their search for Tamama and ended up in Mont-Saint-Michel, France where they met mysterious girl named Sion, who holds the mysterious Ryū no Hon (Dragon Book). But little they know about the secrets about her and the worldwide calamity that would destroy the entire world, as they know it...

Reception
During its first week, Keroro Gunso the Super Movie 4: Gekishin Dragon Warriors was placed 5th at the Japanese box office.