They say to dive at that spot then with a Pokemon that knows dig use dig after reading the wall in the chamber then with a relicanth last and wailord first look at the dots at the last room and you will open the regis tomb's.
you need dig relecnath and wailord dive surf then go to the cave near pacifidlog city then get past that and put wailord in front of your team and relecnath in the last rhen a erthquake will apaer then go to his cave and read the dots wait like 6 minutes then the cave wil open
you leave the cave
go to the seald chamber open the wall with dig. then you have to get relicant and a wailord. now read the dots on the wall and a earthqake will appear. now the cave that the regis are open
you can use it in any cave to get out of the cave
In a battle or a cave
You can only use the HM dig in a cave, but it takes you to where you came in!
they find a cave or dig a den
go to the ruin maniac cave on the high part of the route below veilstone city and in the cave is the TM dig. hope i helped! :)
find it in a cave
Usually a kind of cave or hole they dig. Usually a kind of cave or hole they dig.
There is a place in fallarbor town where a man is digging in a cave that comes from his house there is also a little boy outside the cave entrance that will give you dig.