look on serebii.net
If you go south from lavender town you should be on route 12
in the route just south of goldenrod city
Route 30.
route 38
Route 45
pokewalker route
route 44
Between Mahogany Town and Lake of Rage.
Route 44.
Should be on route 19.
You don't!
Suicune is on Route 25.