The Pewter City Gym is the first Pokemon Gym you will be able to challenge on your journey. This Gym is full of trainers that specialize in Rock Type Pokemon, which is why you will need at least one Grass Type Pokemon or Water Type Pokemon within your Party in order to be able to challenge it. There are two trainers that stand before you and the Gym Leader, Brock, but they can easily be avoided by walking around them. By defeating Brock, you will earn the Boulder Badge and be given TM01.
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