A Nidoking's ire is so uncontrollable that it can carve a path of destruction from its home in the wild all the way to larger human settlements. While it is known to go berserk when its battle frenzy is activated, the sight of a Nidoqueen it is very close to can soften its blind rage.

As mentioned previously, Nidoqueen and Nidoking are considered the male and female forms of each other despite being completely different species. They are depicted as larger and a bit more imposting to the rounder design of Nidoqueen, sporting more spines and sharp fangs across its jaw.