You can find Nidoran in route 3 (sometimes even Nidorino\Nidorina) and the Safari Zone in Fuchia city.
You can't get nidoran in emerald only in firered and leafgreen.
You can catch her on route 103, really rare though so look hard! :)
Only On FireRed LeafGreen.
At The Pokemon Safari In Fuschia City
It is impossible to catch a male or female nidoran in Pokemon Ruby. To get one you'd have to get it by trade.
use a moonstone on a nidorina. catch nidoran female or nidorina in safari zone
You can't get nidoran in emerald only in firered and leafgreen.
go to the safari zone, catch a nidoran(female) or a nidorina and use a moonstone (if it's a nidorina)
You can catch her on route 103, really rare though so look hard! :)
Nidoran evolves when he or she reaches level 16.
Only On FireRed LeafGreen.
At The Pokemon Safari In Fuschia City
Lv.16
Either catch a Nidoran F on the route west of Viridian City and evolve it into a Nidorina, or try your luck at finding one in the Safari Zone.
It is impossible to catch a male or female nidoran in Pokemon Ruby. To get one you'd have to get it by trade.
Goldeen/Seaking, Nidoran/Nidorino, Nidoran/Nidorina and Rhyhorn/Rhydon learn it.
There are a bunch of Pokemon that can evolve: Nidoran, Pidgey and plenty more.