Route 36 and 37
you can catch a growlithe at route 37.
You catch Snubbull in Route 37 and 38
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.
Catch a Vulpix on Route 7, 8, 36, 37 or 48, then evolve it using a Fire Stone.
At route 37 you can catch:Stantler,growlithe,pidgey and rattata.
dunsparce is on route 37
You mean Sudowoodo (Soo-do-woo-do)? Well first you go to Goldenrod City and find the Gym Leader Whitney in the Radio Tower get her back to her gym and defeat her. Than you have access into the Flower Shop and the owner will give you a watering can. Then go back to Route 37 and water the Pokemon and then you must catch it or defeat it.
You can only catch Vulpix in SoulSilver, not in HeartGold. You can catch it on route 36 and route 37.
Route 36 and 37
in Pokemon soul silver catch it in route 36, route 37, and route 48. (Note that i don't know if it is the same for silver)
you can catch a growlithe at route 37.
Just run around in the grass in route 37. You can also go to route 48.
Route 36-37
You catch Snubbull in Route 37 and 38
You can breed Vulpix by going to the Pokemon Day Care and putting in a male Ninetales and female Ninetales. You can also put a female Ninetales and a Ditto. You can find Vulpix at: Route 7 Route 8 Route 37 Route 36, Route 37 Route 48
Route 1, 2, 29, 30, 31, National Park, Route 36, 37 and all at Night time.