M.E.C.H. is a terrorist organization led by Leland "Silas" Bishop. Their goal is to establish a new world order through the aquisition of highly advanced weapons of mass destruction. After learning of the Transformers existence, their goal is to use the technology of their Cybertronian robotic bodies to create their own Transformers under their control.
They discovered Optimus Prime — this began their great evil plans.
Optimus Prime, however, started a rescue mission, which in first Bulkhead refuse to join. Finally, Miko persuaded him and it was Bulkhead instead who saved Breakdown. One moment, there was a chance that the two rivals would become friends, but Starscream, who arrives with Decepticon reinforcements, smashed that chance.