Crashhopper greatly resembles a mix between a grasshopper and a praying mantis with significantly large hind limbs. He has the same green color scheme as Stinkfly. He has a large green horn and wears green overalls with black stripes all over. The Omnitrix symbol is on his stomach.
Due to his relatively long and muscular hind legs, he is able to jump extremely long distances, leaving behind a shock wave. He has a very hard and powerful horn-like skull which he uses as a battering ram.
The shock wave created from his jump is strong enough to push through a large number of giant ants that were on top of him as seen in It Was Them.