| Rock Tunnel|
|Information about Rock Tunnel|
|Connecting locations:||Route 10|
|Generation(s) available:||I, II, III, and IV|
Rock Tunnel is a passageway in the Kanto Region from Cerulean City to Lavender Town. In the Generation I games, it is the only way to progress at the time required to take it, due to a sleeping Snorlax on Route 12. Because of the dark, a Pokémon who can learn Flash is required to go into rock tunnel. The only way to learn flash is by receiving an HM08 from Prof. Oak's Aide near Diglett's cave.