Shockwave is a Decepticon from the Transformers: The Movie franchise.
Shockwave arrived on earth with his fellow decepticons after Swindle's beacon was sent out, right before he was destroyed by Bumblebee. He arrived on Earth, crashing into a strip-mine. He imediatly scanned the only thing that was large enough a vehicle mode form, a Bucket-Wheel Excavator, and then met up with the decepticons.
He was then assigned to dig a strip mine with the Constructicons and Gravedigger to create energon from the findings. When the Autobots arrived on earth, Shockwave was called into service to fight the Autobots Optimus Prime, Jetfire and Hound. Overall, the gigantic Decepticon battered them, but Jetfire managed to strike the behemoth right in the centre of the eye, he managed this via Hound and Prime creating a distraction. The stricken decepticon then fled.
Shockwave (Voyager-class toy)
- Voyager-class Shockwave converts from a MAN Takraf RB293 Bucket-Wheel Excavator into a robot that is tall for a Voyager-class toy, being nearly the same size as a Leader-class toy. In vehicle-mode, his only features are his moving treads and his posable and spinable bucket-wheel. In robot mode, he can use his Bucket-wheel as a 3rd-arm mounted saw.