You can't get nidoran in emerald only in firered and leafgreen.
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You can't do it quickly or with a master ball
You can catch both male and female Nidoran on Route 35 and Route 36.
Sorry but you can't. Nidoran is not available for capture in the wild on Sapphire. I dunno if someone will trade you one within the game; but I got my Nidoran female out of my Fire Red game. I own Fire Red, Leaf Green, Sapphire and Emerald. Good luck getting it!
you can catch it in your pokewalker in the refreshing feild ruite.
It is impossible to catch a male or female nidoran in Pokemon Ruby. To get one you'd have to get it by trade.