The "greatest spy in the world" is a tall, slender man who wears a white spy coat with a black shirt under it.
The Spy captures another spy and steals his clothes. He puts on white hair and a white mustache to disguise himself. He makes the spy rats take a microchip to their home.
The spy later goes to the lab and sees the spy rats running away from a machine the Rescue Rangers are using. He escapes with his rodent sidekicks. After the Rescue Rangers defeat him, the spy and his rats get arrested.