On seven island near tanoby chambers.
It dosent have one
7 island
in union cave you need to go down the ladder by the scientist, surf in the water and look in that cave till you find a boulder. move it and exit the cave, hop down the ledge and into the other cave. there you have it!
lost cave
In icefall cave.
Cerulean cave
Yes it is in a cave.
You can find the Cerulean Cave in the northwest corner of Cerulean City in Kanto in Pokemon LeafGreen. The cave contains the Pokemon Mewtwo.
On island 7, where the double battle trainers are.
in the cave with the statues on the 5 or 6 islandYou go to the Tanoby Ruins. You must solve the puzzle in the Tanoby Chamber.
There is no awakening cave.
its not under a boulder its smeargle and there everywhere in artisan cave.
in union cave you need to go down the ladder by the scientist, surf in the water and look in that cave till you find a boulder. move it and exit the cave, hop down the ledge and into the other cave. there you have it!
in cerulean cave.
Diglett cave
How to get to lost cave in leaf green??
To Unlock the Unowns on Leafgreen or Firered go to Seven Island and proceed though the Sevault Canyon as you progress through you should see a cave entrance go inside and complete the boulder puzzle you will get see the screen shaking followed by a message. after that go to the ruins on the southernmost part of the island and simply wonder inside and you will encounter the unown
The boulder puzzle can be found in Sevault Canyon on Quest Island. The puzzle itself is inside a chamber called Tanoby Key. Tanoby Key is found in a cave near the north of the Canyon.
Altering cave is on 5 or 6 island.