U will need flash for this. once you have flash you stand in the middle of his cave and use flash then go in and catch the FUTHAMUKA
It is the dots, on the north face of the cave.
there is no diglett cave in Pokemon ruby only in leaf green and fire red
Read the braille, then don't touch the game for about 2 minutes. This will open the door to Regice.
in the granite cave
sootopolis
fire cave
in sootopolis
I don't think you can get regirock in pokemon ruby.
the island cave is on route 105.
lost cave
It is on dewford island.
In sootopolis's Cave of Origin