Mt. Moon is a mountain located in northern Kanto, between Pewter City in the west and Cerulean City in the east. Climbing does not seem to be possible; to get past it, travelers always need to travel through the caves.
Mt. Moon is known for being one of the few places that wild Clefairy can be found and for its frequent meteor falls. The shards of meteorites that fall here become Moon Stones, thus giving it the name Mt. Moon. The mountain is also known for being home to Pokémon Fossils. Brock digs for Fossils here in his spare time.