User blog comment:Matt Hadick/Ultimate Battle Final Round/@comment-71.204.88.104-20130709025320/@comment-4738647-20130709175339

Well that's probably because Mechagodillza is magnetic.

There are no records of what the Transformers are made of, they have Cybetronium (a fictional element) in their circuits and Energon for fuel (which work in an unknown way).