many towns in Ireland are located at bridge points on rivers. this is because bridge points become a route focus. ( crossing points in other words)
Wellspring cave (Route 3)
To destroy the huge rocks on route 509 you must first learn the TM Focus Punch from one of the gym leaders. Go up to the rocks, it will ask you if you want to use focus punch, say yes. Voilà .
get 2 rattatas (a boy and a girl) at route 225 or 226 (they are rare) and breed them and get the rattata to lv 34 and keep quick attack then get a focus sash at route 221
functional regions.
route 221 from the old man (like the newspaper) you must bring him the Pokemon he wants and there is a new one every day
In HeartGold, buizel appears in Route 6, Route 9, Route 10, Route 13, Route 21, Route 22, Route 24, Route 25, Route 26, Route 27, Route 28, Route 30, Route 31, Route 32, Route 35, Route 42, Route 43, Route 44, Route 45, Route 47, Ruins of Alph, and Mt. Silver
You can find Shinx on: Route 1, Route 2, Route 3, Route 4, Route 5, Route 7, Route 8, Route 11, Route 14, Route 15, Route 16, Route 17, Route 18, Route 29, Route 33, Route 37, Route 36, Route 37, Route 38, Route 39, Route 46, Route 48, National Park Safari Zone (Special Items) I know that on Route 1 you have a 40% chance. Others are probably similar.
You can catch a Whismur in a lot of places:Route 6, Route 9,Route 10, Route 13Route 21, Route 22, Route 24, Route 25, Route 26, Route 27, Route 28,Route 30, Route 32, Route 35,Route 42, Route 43, Route 44, Route 45, Route 47,Ruins of Alph, Mt. Silver
You can get the TM focus blast by buying it in the department store, in Pokemon diamond, peral and, platinum go to vailstone city and go to the 3rd floor in the department store, and in Heart Gold and Soul Silver go to goldenrood city and go to the fourth floor.
You can find one on: Route 1, Route 2, Route 3, Route 4, Route 5, Route 7, Route 8, Route 11, Route 14, Route 15, Route 16, Route 17, Route 18, Route 29, Route 33, Route 37, Route 36, Route 37, Route 38, Route 39, Route 46, Route 48, National Park I suggest using a pokemon that is a higher level to almost knock it out. Or you could just use a very powerful ball (ultra ball, nest ball).
focus on is correct
In Pokémon Diamond you can find a Cherubi at Route 205, Route 206, Route 207, Route 208, Route 209, Route 210, Route 211, Route 212, Route 213, Route 214, Route 215, Route 218, Route 221, Route 222, Eterna Forest, Floaroma Meadow, Fuego Ironworks and Valley Windworks