The Keroro Platoon travels to planet Sengoku Ran and assumes the name Warrior Kero Platoon in order to defeat the 6 Warrior Viper brothers that are terrorizing the citizens. To do this, they collect the five Keronian war artifacts that will form the ultimate weapon.
A running gag in this series is that the narrator ends his sentences with de gozasourou and a message machine landing on Keroro's head squishing him flat.
During their mission, the ranks of the members of the platoon are as follows: Warrior Keroro, Common Foot Soldier Tamama, Ranger Giroro, Doctor Kururu and Chief Dororo
|Platoon members||Armor / Getup||Weapons||Legendary weapon|
|Keroro||Thick green armor with big green gloves and a warrior helmet.||A red lightsaber||A green lightsaber with the blade in the form of a dragon.|
|Tamama||Same thick armor as Keroro's but only black. Also, he has big black gloves and a wide rim steel hat with a rhinoceros beetle on top.||A polearm with multicolored dango.||An armored glove in the form of a tiger.|
|Giroro||A brown wide rim straw hat and a brown leather shawl.||A gun that shoots red beams.||A high-tech bazooka with blasts in the form of a bird.|
|Kururu||A white and orange jacket with black pants. Inside his orange jacket, there are many spices and cooking instruments that are used for making curry.||N/A||A robot that makes things come to life.|
|Dororo||A blue ninja uniform with the same big gloves as Keroro and Tamama but only blue. His ninja mask is now black with a large red jewel in the form a shuriken. He also wears a blue gas mask and wears a red bandana around his neck.||A red lightsaber-like blade.||Has the ability to unite the other members' legendary weapons. In the manga, he has light blue armored glove with claws.|