* Fire Stones are not in Emerald: The Fire Stone is a common evolutionary item in other Pokemon games, but it was not included in the original Pokemon Emerald.
How to evolve Pokemon that need a Fire Stone:
* Trade Evolution: Many Pokemon that evolve with a Fire Stone (like Vulpix, Growlithe, and Flareon) can only be evolved through trading with another Pokemon game that has the Fire Stone.
* Emerald Trade Feature: You can use the Wonder Trade feature in Emerald to potentially get a Pokemon holding a Fire Stone, although this is very unlikely.
* Game Shark or Action Replay: If you're willing to use cheats, Game Shark or Action Replay devices can be used to obtain a Fire Stone in Emerald. However, this will break the game's intended balance and might not be allowed in online competitions.
Remember: If you're playing a legitimate copy of Pokemon Emerald, you'll need to rely on trading or other means to evolve your Fire Stone-evolving Pokemon.