Armagedroid

Armagedroid (nicknamed XJ-0 by some fans) is a 100 foot-tall android created by Dr. Nora Wakeman (also the creator of XJ-9/Jenny.) His original purpose was to destroy all alien weaponry during The First Intergalactic War, but eventually became mad with power and destroyed ANY weapon that crossed his path. He is one of Jenny's few enemies that not only she couldn't defeat alone, but almost killed her (twice) in the process.