Question: can nidoran breed with ditto?
Answer: If you breed Nidorino with Ditto, you will get the male Nidoran. And yeah, the female Nidoran is the only evolution of the Nidoqueen family that can breed, so you will have to breed Nidoran female with a ditto or a Nidoran male, or Nidorino or Nidoking to get a Nidoran female egg. Nidorina can't breed, unfortunately.