Yes, I caught one in the Heartgold version.
Chat with our AI personalities
Yes, the female nidoran is blue and male nidoran is purple
Pokemon Red/Blue Nidoran (male) learns 'Double Kick' at level 43 Nidoran (female) learns 'Double Kick' at level 43 Pokemon Yellow Nidoran (male) learns 'Double Kick' at level 12 Nidoran (female) learns 'Double Kick' at level 12 Pokemon Silver/Gold/Crystal Nidoran (male) learns 'Double Kick' at level 12 Nidoran (female) learns 'Double Kick' at level 12 Pokemon Ruby/Sapphire/Emerald Nidoran (male) learns 'Double Kick' at level 12 Nidoran (female) learns 'Double Kick' at level 12 Pokemon Diamond/Pearl/Platinum Nidoran (male) learns 'Double Kick' at level 9 Nidoran (female) learns 'Double Kick' at level 9
Go to the west of Viridian City, towards where the Elite 4 is reached (and where you had your rival battle): In red, Nidoran Male will be pretty common here, and Nidoran Female will be much more rare, but IS present (the reverse is true in blue)
A little girl in one of the underground paths will ask for a nidoran male if you give her one you will recieve a nidoran female.
You can catch both male and female Nidoran on Route 35 and Route 36.