Pokemon Diamond: Chaining Miltank?

i have been studding miltank's for years and i have discovered that they are very common using the poke radar on route 210,209,so are tauros,tauros is the male virgin of miltank,miltank is a good Pokemon because it produces moo moo milk which is very good for your Pokemon.and tauros and miltank are common in pearl and diamond.