Gyms are an excellent source of EXP, especially in Fire Red Rocket Edition, where EXP and money are pretty scarce. That said, you can reach the credits screen without fighting a single Gym leader ...

as it is more or less a direct copy of Pokemon Red. We will mainly be focusing on the path of progression through the Gym ...

Who is the Best 1st Pokemon Gym Leader in the Franchise? Come see where The Game Haus ranked all 12 of the options.