Sgt. Frog Episode 104: Keroro - Farewell, my Dear Keroro! / Keroro - Countdown to Ruin
Episode 104 of 358 of Sgt. Frog, aired April 7, 2006, 25 minutes. Available with English subtitles and dub where released.
Episode summary
The Keroro Platoon is getting serious about invading! Only they`re acting very strangely. Why are their eyes suddenly a different shape? Source: crunchyroll