East of New Bark Town is Route 27, which runs West-East. East of Route 27 is Route 26, which runs North-South. You can access these routes when you have eight gym badges and have beaten the Kimono sisters. They lead to Victory Road.
pokewalker route
its on route 26
Route 44.
go to route 44
On Route 35, the route above Goldenrod City.
Route 30.
it comes right after route 27 its past tojo falls and you go on it when you go fight the elite four
Route 45
pokewalker route
route 38
route 44
Between Mahogany Town and Lake of Rage.
its on route 26
Route 44.
Should be on route 19.
look on serebii.net
go to route 44