Granite Cave (Japanese: 石の洞窟Stone Cave) is located northwest of Dewford Town, with its only entrance on Route 106. In Generation III, in its deeper levels, Flash needs to be used to see clearly; otherwise, there will only be a small circle of visibility around the player. However, in Generation VI, it is just merely dark in these areas, but still quite visible to the player.
In the cave, there are muddy slopes which require the Mach Bike to traverse.
In Pokémon Ruby, Sapphire, and Emerald, Steven's room is located in the deepest part of the cave. The cave is laid out such that the player need to traverse all of the floors in order to reach Steven's room, although there are areas that require to Mach Bike to access.
When going into Steven's room looking for a Meteorite Shard, Zinnia is present and staring at the mural. Upon noticing the player, she requests to battle the player. After she is defeated, she gives the player a Meteorite Shard, which also causes the player's Meteorite in their Bag to react and transform into its fourth state.
Granite Cave appeared in A Hole Lotta Trouble. Ash and his friends entered the cave in order to find Steven, who was digging for rare stones inside it. All of a sudden, the group fell into a trap hole dug by Team Rocket, which soon gave way even deeper into the cave, separating the group and the Rocket trio members from each other. After a while, Max, Meowth, and Pikachu came across Steven, who later proceeded to save the rest of the groups from an attack of a group of angered wildAron. Outraged by Team Rocket disturbing the wild Pokémon living in the cave, Steven sent out his Aggron and had it send the trio blasting off with Hyper Beam. In the aftermath of the blast, Steven managed to find a Fire Stone.
In the manga
Granite Cave in the Pokémon Adventures manga
In the Pokémon Adventures manga
Granite Cave was the first place Ruby and Sapphire headed to after they had spotted each other again in Dewford Town in Guile from Mawile. There were two tunnels at the entrance. Ruby went into the tunnel on the left and met Steven Stone, who was exploring the cave for rare stones. Sapphire went into the tunnel on the right to train for her upcoming match with Gym LeaderBrawly. She was also meant to deliver a letter to Steven, but missed the chance after Ruby told her that he had left.