Just enter the cave. Go up to the braille and press A, and don't do anything else. Use the toilet while you wait, it'll be a while.
there is no cerulean cave in ruby
It's pretty easy. All you need to do is get the HM Flash. If you don't have it, then it will be hard getting through in that cave :)
you have to go through the cave to get it.
You must first go through the cave of origin.
Walk to the middle of the cave and use flash.
there is no diglett cave in Pokemon ruby only in leaf green and fire red
He doesn't finish his cave in Ruby. That only takes place in Emerald.
In Pokémon Ruby, TM07 (Hail) can be found in the Shoal Cave. To obtain it, you need to navigate through the cave during low tide. Look for a room where you can find the TM on the ground. Make sure to explore the area thoroughly, as the cave has various paths and items.
You have to firs beat elite 4. The cave will open up in Cerulean. Enter the cave, use flash, and navigate your way through. Find MEWTWO and catch him. Cerulean cave is not available in Ruby, Sapphire, and Emerald.
Cave of origin is in sootopolis city in ruby emerald and sapphire. Play through the game and you gain access to it. (Before the elite four you get to it)
You cannot get Kyogre in Ruby. You can only get Groudon in the Cave of Origin.
I don't think you can get regirock in pokemon ruby.