MT MOON

'A mountain where shooting stars are said to fall. It is apparently abundant with fossils.'

Mt Moon can be expansive and mysterious, encompassing routes 3 and 4 outside Cerulean and Pewter City. While the mountain seems devoid of most life aside from rock and ground types, there can be plenty of Pokemon to be found outside, along with a Pokemon Center on the Route 3 side of the mountain, just outside of the entrance.