Commander Croc is a car from the Mutant Machines series and the BBY79 (Green) version appeared in the video Team Hot Wheels: The Origin of Awesome!. The front and the back sections are connected with a spring, which is covered in a rubbery plastic. Between the two parts is a kind of backbone and it has a small wheel on the bottom of it. The "towball" on the back can be attached to the front of another Mutant Machines car.
The Commander Croc has been released in the following 1/64 scale versions: