A milktank is right above sicone town.
route 209 and 210
Route 210 South (Poke-Radar)
route 210 (solaceon side)
yes, you can find miltank on route 209 and 210.
You can't find miltank anywhere on ruby only colosseum can get miltank.
the north route of solaceon town and you can see it by battling a milk maid in the house on the same route
I found the Pokemon "MILTANK" at route 38, 39, and 47.
Route 38
Miltank is a Normal type pokemon.
you can find miltank at route 209 with pokeradar (2%), and route 210 (south) also with pokeradar (2%)
Pokeradar on routes 209 and 210
You have to trade one from Emerald or Colosseum.