Sgt. Frog 52-103 Giroro: Bright Red, Gritty Days, Sir!\NKoyuki Fights to Protect the Person Who's Important to Her, Sir! - Watch on Crunchyroll

Sgt. Frog 104-154 Keroro: The Outing Isn't Over Until You Say I'm Home, Sir! / Keroro: The Sukiyaki of Love and Sadness, Sir! - Watch on Crunchyroll

Sgt. Frog 308-358 Keroro vs. Giroro: Battle in the Icy Rain, Sir! / Keroro Platoon: The Great Forget-the-Year Party, Sir! - Watch on Crunchyroll

Giroro (Sgt. Frog Character), The Parody Wiki

AICN Anime - Review Column - Sgt Frog, Eden and Gantz

Sgt. Frog 1-51 Giroro: The Most Dangerous Man in the Universe, Sir! / Keroro: Rain with a Slight Chance of a Dangerous Man, Sir! - Watch on Crunchyroll

Sgt. Frog 1-51 Keroro's Critical Point Breached, Sir! / Keroro's Secret Mission Begins, Sir! - Watch on Crunchyroll

Sgt. Frog 52-103 Natsumi: Giroro Falls? The Do-Or-Die Rescue Operation, Sir! - Watch on Crunchyroll

Sgt. Frog 52-103 Atrocious, Annoying Legend of the Universe's King of Forgetting Homework, Sir! - Watch on Crunchyroll

Sgt. Frog 52-103 Keroro: Froggy Races, Sir! / Mois: Sleeping Beauty,Or, Like, Slumber Desired, Sir? - Watch on Crunchyroll

Sgt. Frog 52-103 Fuyuki & Momoka's Secret Mystery Date, Sir! / Keroro: Come On, Let's Make a Video Game, Sir! - Watch on Crunchyroll

Sgt. Frog 52-103 623: Wanna Be on My Radio Show, Sir? / Keroro vs. Natsumi: 1/6 Earnest Battle, Sir! - Watch on Crunchyroll

Sgt. Frog 52-103 Keroro: I Couldn't Say Merry Christmas, Sir! - Watch on Crunchyroll