As previously mentioned in earlier entries, despite being completely different species, Nidorino and Nidorina are compared to each other as a form of sexual dimorphism. Unlike the female Nidorina, Nidorino lacks little roundness in its design and is angular and spiky throughout most of its body.

Nidorino, like its previous evolution is quite close in form and shape to a rabbit. but unlike its past form, it leans a lot closer to rhino with a change in its snout, prominent horn, and overall body shape. The bristling of its spines could also be a reference to porcupines and hedgehogs.