Pewter City

Pewter City (Japanese: ニビシティ Nibi City) is the second major city in Pokémon Red and Blue and Pokémon FireRed and LeafGreen. It can be found between Viridian Forest and Mt. Moon. It is also the location of the second Gym, and the first Gym Battle, whose Gym Leader is Brock.

Pewter Museum
The Pewter Museum is located far north of the Pewter Gym. It is 50 Pokémon Dollars to get into the main part of the museum. On the other side, if you Cut a small tree, you are able to recieve an Old Amber from the scientist.

However, during Generation II, the museum is closed for renovations.