Diptirroly is based on the Soldier Fly, like its pre-evolutions the Pokémon has a distinctive blue appearance, this carries over into the final form which has a large armoured thorax and abdomen, it has two extremely large wings for its body size which are covered in a hard rocky exterior on the top giving the Pokémon incredible lift. It has large compound eyes which are glassy in appearance and act like mirrors reflecting whatever is around it. The Pokémon has relatively short but strong legs located all on its thorax, the legs are largest at the joints giving them a bony-like appearance although are also a very dark and dull shade of lime-green making them appear like stone. The Pokémon's jaw is more refined than its pre-evolution with the two outer-lower mouth parts forming teeth-like tusks for the Pokémon allowing it to more easily crush up the leaves and berries it eats.
The most notable features however come from its body and tail, the Pokémon's body is glassy blue like its base form however has beautiful swirling patterns which are created from the special fluid it creates when changing from a larvae to an adult which become flash frozen in place creating the unique patterns, supposedly the patterns differ from region to region based on climate. The other key feature of the Pokémon is its tail, developed from its pre-evolution the tail's club-like protrusions re-appear as three massive rocky clubs made of the rocky carapace of its pre-evolution as well as the left and right facing protrusions developing into spikes giving it a flail-like weapon that has enough force to send small Pokémon flying if it lands a direct hit.