Cannonbolt is a hulking, broad-shouldered alien covered in natural armor plating on its back, shoulders, and the backs of its arms. This armor can withstand acids, lasers, and even a g-force drop from space without any harm to the subject. Cannonbolt can roll into a ball like an armadillo or pill bug to encase itself in this plating. There is enough space within the shell while rolled up to protect and transport people or objects. When in the form of a rolled-up ball, Cannonbolt can increase its rotational momentum and roll into enemies as an attack, as well as ricocheting himself off surfaces. Cannonbolt demonstrated his extremely tough plates in Ben 10; Secret of the Omnitrix when he broke through three electric, metal doors in order to get to Azmuth, the creator of the Omnitrix, which makes an error on the Omnitrix and from that moment, Ben
can use Cannonbolt as long as he wants. It's plates are tough enough to be like car wheels when in a ball. However, it is subjected to the physical laws of reflection and conservation of momentum, meaning that it has difficulty stopping or controlling its direction if it picks up speed. By spinning in the same spot rapidly it can create a tornado like XLR8. Cannonbolt's armored shell is used for a defensive mechanism which means that it is extremely resilient(but because of Ben's creativeness he has adapted this to attacks.The shell is durable enough to survive a free fall from the upper limits of the Earth's atmosphere, including the heat of atmospheric re-entry, and still leave Cannonbolt and anything held inside the ball intact, though the landing still creates some pain due to the large crater left there. Nothing has been known to penatrate the shell .