this is if you run choice scarf:
for Nidoran (M)
140 Atk / 36 Def / 196 SPAtk / 116 Spe
OR
220 Atk / 36 Def / 116 SPAtk / 116 Spe
depending on whether or you want higher Atk or SPAtk
with choice scarf, those EVs let you hit 21, which lets you outspeed everything not scarved.
if you're not running Choice Scarf (i suggest you do btw, unless you make a Beat Up lead), then 220 Atk / 36 Def / 36 SPAtk / 196 Spe
i could spend all day talking about possible movesets. i'll let you see what works best for you.
for Nidoran (F)
220 Atk / 20 Def / 36 SPatk / 36 SPDef / 188 Spe
OR
60 Atk / 20 Def / 196 SPAtk / 36 SPDef / 188 Spe
nidoran needs max speed to reach 21 with scarf, so run max speed regardless.
same as above about the movesets.