Pokémon FireRed and LeafGreen/Pewter City — StrategyWiki

Pewter City is where you find your first gym challenge, in which you'll be able to earn your first badge.
Pewter City is where you find your first gym challenge, in which you'll be able to earn your first badge.

Where are the Moonstones located in Pokémon FireRed? - Quora

Pokémon FireRed and LeafGreen/Route 5 — StrategyWiki

Pewter City Gym - Pokemon Fire Red and Leaf Green Guide - IGN

How to Beat Pewter City's Gym Leader in Pokémon FireRed and LeafGreen - Master Noobs

Pewter City, Pokémon Wiki

How to Beat Pewter City's Gym Leader in Pokémon FireRed and LeafGreen - Master Noobs

Pokemon Leaf Green/ Fire Red Walkthrough - Game Boy Advance, Game Guides - Pokemon Leaf Green/ Fire Red Walkthrough

Pokémon FireRed and LeafGreen/Route 2 — StrategyWiki

Pokémon Gold and Silver/Victory Road Pokémon gold and silver, Gold pokemon, Gold and silver

Pewter City - Pokemon Fire Red and Leaf Green Guide - IGN

Pokémon FireRed and LeafGreen/Pallet Town — StrategyWiki

Pewter City - Pokemon LeafGreen Guide and Walkthrough