The Special Forces are one of the two divisions of the Kung Zhu branch of Zhu Zhu Pets. In the U.S., the Special Forces consist of Rivet, Stonewall, Rock'o, and Sgt. Serge, but more Special Forces hamsters may be available internationally.
There are also two subdivisions within the Special Forces. Rivet and Sgt. Serge are in the Rangers, and Stonewall and Rock'o are in the Delta Force.
In contrast to the Ninja Warriors (whom they are supposedly at war with), the Special Forces follow a more military theme. Their playsets have a black and green color theme. These include two army-style training courses, a Military HQ, a Mission Control room, and a Combat Bridge.