Breakdown

Breakdown is a Decepticon from the War For Energon portion of the Super Dion Bros series.

Along with Knock Out, Breakdown arrived on Earth with the mission to assist Delgatron X. He's also Knock Out's assistant for medical operations and he also has most missions together with him. Since joining the war on Earth, Breakdown has proven to have some quite intriguing depths to his character, besides his deep friendship with Knock Out. He doesn't treat the cannon fodder Vehicons as such, and even chats to them about romance and is sure to thank them for their hard work. He also has a healthy dose of respect for his foes, as well as gratitude. However, these noble traits are tempered by his boisterous temper; always eager to join a fight or pound some dents into someone. That temper of his could get him killed one day...

War For Energon comic
When Ex-Commander Starscream was captured by the Autobots' New Commander Rodimus, Breakdown, Freestar and Blackout were send out on a mission to safe him. After a long time, the Decepticons finally achieved destroying Optimus Prime. Breakdown was commanded by Skyscream X to stay on the main guard when they headed to Cybertron inside the ship. On Cybertron, Breakdown with a few other Decepticons chased off the Autobots and went in battle when Unicron suddenly attacked Cybertron in his Death Egg mode.

He and Knock Out attacked Jazz while he was checking out the area. He was present when all the Decepticons were preparing for an alliance with the Autobots. Breakdown met his end when Unicron used his Supreme Blast, along with Jazz Prime, Doomsday and Chrono.