In the Pokemon mansion but only in fire red
You can catch a Growlith in the Pokemon Mansion on Cinnabar Island.
You could find wild Growlithes in Route 48.
You can not get a Growlithe in Sapphire. You'll need to trade with Fire Red or Leaf Green.
Trade, probably. Or maybe if you look hard enough in the safari zone. . . .
Growlithe is found in the Pokemon Mansion on Cinnabar Island in Pokemon Firered.
Growlith can be found in route 37.
Im afraid there is no other way except using an action replay cheat cartridge.
Unfortunately, you cannot catch a Growlithe in Pokemon Leaf Green. You need to trade one from Pokemon Fire Red or XD.
you should train growlith until it learns flame wheel, then evolve it.
Trade
I'd say Mareep, Totadile, Machop, and Growlith.
you cant.you have to insert Pokemon firered.