5. Cyclonus
Nastiest Moment: In the Marvel comics, Cylconus mind was taken over by Unicron, who used him to kill Shockwave and become leader of the Decepticons
4. Bonecrusher
The Decepticon: With a fighting style thats inspired by the movements of football players, Bonecrusher lives for the kill.
Somewhat hunchbacked, he takes the form of a Buffalo H Mine-Protected vehicle and is driven by pure hatred for all things Autobot.
Nastiest Moment: Bonecrusher chases Optimus Prime down a highway, slinging other vehicles out of the way and wantonly destroying anything that strays into his path...
3. Shockwave
The Decepticon: A giant Decepticon, Shockwave is a scientist who lacks any perceived emotion and can turn into a self-propelled cannon.
He also has power over a Cybertronian creature called Driller, which comes in handy whenever he needs to burrow underground.
Nastiest Moment: Shockwave was responsible for sealing off Chicago in Transformers: DOTM, preventing any outside forces from interfering with the battle. Not only that, he also takes on Optimus Prime
2. Megatron
The Decepticon: A loyal disciple to The Fallen, Megatron is the Big Bad of the Transformers universe--think of him as a giant, robotic Darth Vader and youre pretty much there.
The movies have seen him go through numerous different looks--in Dark Of The Moon, he wears a fetching cowl.
Nastiest Moment: After being defrosted in the first Transformers, Megatron makes short work of Mission City, heading up a Decepticon vs Autobot scrap that decimates much of the city
1. Starscream
The Decepticon: A flying Transformer who takes the appearance of a Lockheed Martin F-22 Raptor jet, Starscreams a fan favourite and the second in command behind Megatron.
Nastiest Moment: Taking out manned fighter jets during an aerial scrap. Its not fair, its really nasty and it looks freaking awesome.
