Sgt. Frog Season 5 Episode 206 Keroro Platoon: The Colorful Plan Begins, Sir! / Dororo: Do You Like Natto, Sir?

Keroro is in the doldrums at the start of the fifth season until a burst of color reinvigorates all of the platoon members. Later, Keroro has Dororo come up with the first invasion plan of the year, but they're surprised or just turned off when it involves soybeans fermented with bacteria, or sticky, stinky natto!