Sgt. Frog is a tV series anime that premiered in spring 2004, produced by Sunrise.

About the production: the story comes from a manga, there are 358 episodes of about 23 minutes and its current status is "finished".

Its main genres are comedy and sci-fi, with themes such as Aliens, Otaku Culture, Meta and Space.

On AniList, Sgt. Frog has an average score of 75%, a very good score, and appears on 17,856 users' lists.

Keroro is a frog-like alien sent from his home planet on a mission to conquer Earth. But when his cover is blown, his battalion abandons him and he ends up in the home of the Hinata family. There, he's forced to do household chores and sleep in a dark basement that was once supposedly a prison cell haunted by the ghost of an innocent girl. He even spends his free time assembling Gundam model kits. During his stay, Keroro meets up with subordinates who were also stranded during their failed invasion. (Source: Anime News Network)

Official synopsis from AniList.