"Autobots! I can't work while I'm being shot at!"
Ratchet has been one to serve Optimus Prime and the Autobot cause no matter the risk. The serves as the Autobot's main medical officer, and in charge of repairs.
During in the War of Cybertron, Ratchet and Optimus were off for the hunt for the Decagon where they ran into Bumblebee, who later joined them in hunting for the Decagon. From battling hordes of Decepticon Forces, they reach the rally point where they see Ironhide on a lift.
Making their way to the gate, Ratchet, Optimus, and Bumblebee encouter Decepticon Brutes, where Ironhide came in and saved them from. Ironhide also saved Ratchet while he was repairing Omega Surpreme.