How do you get into the fire type gym in Pokemon FireRed?

You can't get into the Fire-type gym in Pokemon FireRed right away! You need to unlock it by defeating Brock, the Rock-type gym leader, in Pewter City first.

Here's a step-by-step guide:

1. Start your journey in Pallet Town.

2. Travel east to Viridian City. Defeat the trainers there and collect the TM for Cut from the house north of the gym.

3. Head north through Viridian Forest using Cut to clear the obstacles.

4. Arrive in Pewter City.

5. Challenge Brock at the gym. He uses Rock-type Pokemon like Geodude and Onix. You'll need to use Water-type or Grass-type Pokemon to defeat him.

6. Once you defeat Brock, the Fire-type gym in Vermilion City will open up!

Now you can challenge the Fire-type gym leader, Blaine, and continue your journey!