In route 133 there is a point were you can dive into a tunnel. follow the tunnel until you reach the end and there is a stone tablet that reads go up here in brail use dive and you will enter a cave there are many stone tablets with the brail alphabet on them the very last one in the back witch says dig here then you will enter another cavern that has a story on the tablets that read " In this cave we have lived, we owe it all to the pokemon, but we sealed it away, we feared it, those with courage those with hope, open a door an eternal pokemon waits" Then on the very last one in the back it says first comes Relicanth last comes Wailord.