← Episode 19 – Keroro vs. Natsumi: The Ultimate Showdown at a Festival, Sir! / Keroro: A Radio to Invade Your Ears, Sir! All Sgt. Frog 1-51 episodes Episode 21 – Keroro's Energy-Saving Invasion, Sir! / Keroro's Countryside Exploration, Sir! →
Other seasons: Sgt. Frog 52-103