if u mean the ruby it is on one island after you beat the Pokemon league and have the national pokedex.
You can find the red gem at Boyleland in the Volcano Cave.
I don't really know about Pokemon leafgreen, but in Pokemon red you can get it in seafoam islands. Hope this helps!
you have to trade from fire red
you can't get a growlithe in leafgreen only fire red sorry :( .
... you cant that was just in the show
you Cant... got to trade with Fire red!
You can't find a Vulpix in Pokemon FireRed version. That pokemon is version-exclusive to Pokemon LeafGreen.
you find him on one island in a building with a pokeball on it and a red roof.
you cant find groulithe in leaf green.only in fire red.
You have to migrate it from Pokemon leafgreen,fire red, emerald, ruby or Sapphire
no but you can get it in Pokemon yellow,red,blue,firered and leafgreen hope it helped
You can only get Ekans on Pokemon Leaf Green by trading one from Pokemon Fire Red.