The original Zoids toys which were marketed in the US were small wind-up models. They didn't have individual names or titles, they just looked cool.
The original Japanese models did have names, as did their European counterparts:
Dinosaur Type (upper right):
Bird Type (upper left):
Elephant Type (middle right):
Spider Type (middle left):
Frog Type (bottom):
|R.S. MAMMOTH ZOID
The Zoids Mammoth Kit was the second large battery-operated model to be released in the U.S. (the first was the "Giant Zrk"). It was sold exclusively through Radio Shack, which is where I bought mine in 1984.
Japanese name = Mammoth
The U.S. version has become somewhat of a collectors' item because of its rare (and very cool) dark grey-blue color scheme.