Zombiebot King:
     In  order  to  defeat this monster you have to wear him out using
rockets.  When  he  is  bent  over catching his breath, throw a coring
charge  into his mouth (using the slingshot will not work.) It takes 5
coring  charges  in  his  mouth  to  kill  him.  Starting at the third
explosion those fast zombie things will start coming, so watch out!