Sgt. Frog
Sgt. Frog, known in Japan as Keroro Gunso (ケロロ軍曹, Keroro Gunsō, lit. "Sergeant Keroro"), is a Japanese manga series written and illustrated by Mine Yoshizaki. It was launched in Monthly Shōnen Ace in April 1999. The story follows the attempts of a platoon of frog-like alien invaders to conquer Earth.