Roadbuster is the name of three fictional characters from the Transformers 2011 movie, Transformers: Dark of the Moon and the minor protagonist of Transformers: The Last Knight. He is one of the Autobot Wrecker trio. All three Wreckers transform into NASCAR Sprint Cup Series NASCAR Chevrolet Impala stock cars; Roadbuster's alternate mode uses the AMP Energy/National Guard paint scheme of Jr. Dale Earnhardt, Jr.'s #88 car.
According to his bio, Roadbuster and his partners specialize in traveling across the galaxy to hunt down Decepticons. In the film, he speaks with a Scottish accent. Roadbuster has a pair of shoulder rockets and some chain guns on his hands.
History
Transformers: Dark of the Moon
MRoadbuster, Leadfoot and Topspin are a team of Autobot engineers called the Wreckers, who came to Earth in their ship the Xantium which carried other Autobots, including Sideswipe. NASA took possession of their ship and Director Mearing mentioned they were rarely let off base due to their behavior. When Sentinel expelled the Autobots, the Wreckers prepared the Xantium for launch, but Starscream destroyed their ship as it was leaving. In the battle in Chicago, Roadbuster and the other Wreckers killed the pilot of a Decepticons fighter, and revealed to Sam that they had hid in a booster rocket which detached before Starscream attacked. When Shockwave attacked their convoy and Optimus lost his trailer, they created a diversion so that Optimus could retrieve it. Later they helped Optimus untangle himself and were among the surviving Autobots at the end of the film.
Transformers: The Last Knight
Roadbuster was among the Autobots given refuge in Cuba by Seymour Simmons. He was briefly seen playing vollyball with Topspin.