Mudflap

The goofy-looking Mudflap and his twin Skids are a result of a split spark, and share a close bond accordingly. Mudflap is hyperactive, noisy, argumentative, and eager... not that different from his brother. He's so desperate to impress that he comes off as having the robot equivalent of ADHD. When they're not trying to outdo each other in crazy, daredevil antics, the twins are usually bickering with each other over anything. Like Skids, he possesses hyper-reactive optical imaging scanners, making him able to process tactical information faster than any other Transformer (except Skids). As irritated as Mudflap gets from Skids' vocal one-upmanship, he realizes that they actually work best as a team.
Each twin can transform into smaller, separate vehicles or combine into a single, more durable alternate mode, but whether they can combine similarly into a larger robot mode remains to be seen. Upon first arriving on Earth, Mudflap and his brother took the form of a beat-up old ice cream truck, but he later scanned a Chevy Trax for a disguise. That being said, it's unlikely the twins will keep an alt-mode for long.