a rock type. they r strong against normal types

ok

Fighting-type moves are also super effective. I recommend either a Nidorina w/ Double Kick
(evolved from a Nidoran[F] that you can catch on Route 35), or a Machop w/ Karate Chop
(obtained by trading a Drowzee to one of the people on the sixth floor of the Goldenrod
Department Store).

Nidorino is probably a bad idea, as Miltank will just use Attract on Nidorino and hinder
it badly.