After winning the Boulder Badge from Brock, Tyler and his crew left Pewter City and found their way to Mt. Moon, a mountain which served as a route from Pewter City to Cerulean City where Tyler’s next gym battle awaited. “So this is Mt. Moon.” Tyler stated looking at the entrance of a cave before him. “Yes.” Leira replied. “We can’t climb the mountain though, you have to cross through it’s caves.” she explained. Tyler looked at the mountain for a minute then smiled, pumping his fist in the air in excitement. “There’s probably some cool Pokemon waiting inside!” Tyler screeched.