their r 3 sereis of this
1 zoids choatic century zoids r used in wars (animation is a bit lacking with the 3d computer generrated zoid they dont seem to move realisticly but it quite easy to look over )
2 zoids new century zero zoids r used in competions (this is where the 3d animation is really good they move realsitly and you get and idea of how heab=vy they r wehn they fall to the ground this is a defant watch)
3 zoids fuzor(i have not wtach so no commnet)
note the english dub for all of these are very good so watching in englsih is recommeded

i love this show it is so good the 3D computer geerrated animation is really well done and the hand drawing of the character is really good aswell