Mt. Mortar

Mt. Mortar is a large cave in Johto with three entrances on Route 42. Part of the large range of mountains north of the Johto region, it is known to be a confusing maze-like area with an interior cave known as the Waterfall Cave. It is an optional cave to enter, but contains many valuable items and Pokémon. The player can pass through the mountain caves to bypass the lakes on Route 42. It is the training place of Kiyo, the Karate King from Saffron City. He will reward the player with a level 10 Tyrogue upon defeat.