Question: can nidoking and nidoqueen breed?
Answer: Despite being a non-legendary, gendered species, Nidoqueen are unable to breed. However, her male counterpart, Nidoking, can. Nidoqueen can't breed at all. However, if you breed a Nidoking with another Pokemon in its egg groups or Ditto, the egg can be Nidoran-F or Nidoran-M.