Where are the regis caves?

The Regis Caves, home to the legendary Regis Pokémon (Regirock, Regice, and Registeel), are located in the Hoenn region in the Pokémon Ruby, Sapphire, and Emerald games.

Specifically, they are found in:

* Regirock's Cave: Located in Granite Cave, a large cave in the center of the region.

* Regice's Cave: Located in Seafloor Cavern, a cave found underwater near the easternmost point of the region.

* Registeel's Cave: Located in Ancient Tomb, a cave found in the southern part of the region.

These caves are part of the main story in those games and can be quite challenging to navigate.