You can find a Fire Stone in the Fiery Path after you get the HM for Strength.
Chat with our AI personalities
find one in the firey path or trade 1 red shard for one at the hunter's house
u gotta find a red shard & give it to Hunter to the left of mossdeep city. He lives on an island with one house on it.
With a Firestone you can evolve into a Eevee into a Flareon, A Vulpix into a Ninetails and a Growlithe into a Artacaine
firestones are for Pokemon who only are fire types
Pokemon such as eevee, growlithe, and vulpix.