Wheelie

Wheelie is a sneaky little salvage and scrap drone, always underfoot when you least expect it. As a reconnaissance specialist, he's equipped to the teeth with mid-range surveillance equipment. But his real asset is stealth, tooling along unseen and unsuspected while he accomplishes his mission. Unfortunately for his mission, he often bites off more than he can chew—and ends up being the one chewed on!
Wheelie isn't really a bad sort: a loving home and a little strict discipline could whip him into shape, although he does seem to have a bit of a "mouth" on him.

Ironhide really, really, really dislikes Wheelie.