Issue: #20
An underwater alien adventure or a blast from the past? Looks like Keroro and his friends aren't the only ones planning to invade Earth, it turns out there's another alien force wrecking havoc with a monstrous new weapon! When Fuyuki, Momoka and the others go to investigate the strange ocean sightings, their island trip doesn't turn out anything like they expected. What will happen when they join...
Creators: Stuart Levy, Ysabet Reinhardt MacFarlane, Vy Nguyen, Hope Donovan, Mine Yoshizaki, Star Print Brokers, Michael Paolilli, Lucas Rivera, Louis Csontos, Al-Insan Lashley, Marco F. Pavia, Daniella Orihuela-Gruber, Allyson De Simone, Yuko Fukami, John Parker
Characters: Sergeant Major Kururu, Fuyuki Hinata, Private Tamama, Aki Hinata, Momoko Nishizawa, Lance Corporal Dororo, Corporal Giroro, Natsumi Hinata, Sgt. Keroro