you mean the cute blue haired one?...sandgem town.
Dawn can be found in Sandgem Town in front of Proffesor Rowan's lab
You talk to Dawn's little sister at Dawn's house in Sandgem Town.
You are able to catch once you have obtained your starter and gone to sadgem town there you will talk to Prof. Rowan and Dawn. After that, when you head to Jublife city Dawn will stop you and show you how to catch pokemon. Hope this helps...
Go to Sandgem town, and one day in the big house (Dawn's House.) talk to dawn's little sister and she will tell you that there is a swarm of Cubone east of Jubilife City. Your welcome. :)
On the episode where swinub evolves in piloswine On the episode where dawn gets knocked out in the first round of the salaceon town Pokemon contest
After getting the National Dex, go to Sandgem town and talk to Dawn/Lucus.
You get the birthday message from Dawn in Sandgem Town on your birthday.
She is found in Sandgem town in the biggest house, I think...
Lavander town
There are Pokemon Centers in every town/city.
sunnyshore city is were you find it
Celestic Town is the city/town in which you'll get Surf at.