Island Cave Regice .

In the games Pokémon Ruby, Sapphire & Emerald, after the player complete the puzzle at the Sealed Chamber,
the entrances to Desert Ruins, Island Cave and Ancient Tomb will become unsealed.
After entering the chamber, another puzzle will come between the player and the golem residing within.

In the games Pokémon Ruby & Sapphire, in order to gain access to the rear chamber, the player has to read the Braille on the wall, and wait a full 2 minutes.
In the games Pokémon Emerald, in order to gain access to the rear chamber, the player has to read the Braille on the wall,
and make a lap sticking closely along the walls, in counter-clockwise fashion.