Frog anime series consists of the fifty-one episodes after episode one-hundred-and-fifty-four from the series, which first aired in Japan from April 7, 2007, to March 29, 2008, on TV Tokyo.

tto March" (帰ってきたケロッ!とマーチ, Kaettekita Kero!

and March") by Ichirō Zaitsu & Yuko Ogura is used as the opening from episode 155 to 183.

"Fundari Kettari" (フンダリーケッタリー, Fundarī Kettarī) by Dylan & Catherine is used as the opening from episode 184 to 205.

"Kurutto, Mawatte, Ikkaiten" (くるっと•まわって•いっかいてん, "Spinning, Turning, Once Around") by Kigurumi is used as the ending from episode 155 to 168.