The Eternal Question: Why haven't the Keron Troops been able to invade Pokopen?

The Eternal Answer: They have lacked the frog-power to do so!

Keroro's next scheme is mighty brilliant, even if he does think so himself! With Kururu's invention in his slimy hands, he hops to the zoo to recruit animals to join his platoon. The plan: Use Kururu's diabolical machine to turn any animal into human form! Is there no stopping this high-handed, web-footed wonder?