You can't get Growlithes in Pokemon diamond :( But if you have firered or leafgreen then you can trade via pal park to your Pokemon diamond game.
I got a Growlith in Pokemon dimend! (With out a cheat!) I was just woundering on root 202 going to Jubilfe city because I had to do something! (I realy don't remember!) Oh! I allso got him AFTER i beat the game!
Eevee Growlithe Vulpix
By breeding Arcanine and Houndour.
You will have to evolve a Growlithe by using a Fire Stone.
you cant sorry
You can get growlith at route 201 and 202 if you have Pokemon firered insterted.
Insert Pokemon fire red then go to route 201 or 201 and use the pokeradar
-Eevee->Flareon -Growlithe->Arcanine -Vulpix->Ninetales
You have to have an old pokemon GBA (gameboy) game to get it in diamond and platinum or you could trade someone for it.
If you have FR in the GBA slot, yes (Route 201 & 202).
Vulpix and Growlithe in Pokemon Fire red
You need to have a fire red GBA game inserted into the DS or migrate it.
A total of three Pokemon evolve using the Fire Stone: Vulpix, Eevee, and Growlithe.