Sgt. Frog Episode 196: Keroro Special Returns! Gero Gero 30 Minutes, 13 Stories
Episode 196 of 358 of Sgt. Frog, aired January 26, 2008, 25 minutes. Available with English subtitles and dub where released.
Episode summary
It`s another thirteen-episodes-in-one special! The Keroro Platoon tries to think of lots of strange invasion ideas, Giroro mistakes a "bath" for a "battle," and there`s a special live action segment of the platoon! Source: crunchyroll