You do not dig in walls. You run around in wild grass, or caves to look for pokemon. .___.
you have to dig for a long time in the walls in the underground and you will dig a dome fossil
you found them under ground in the walls then dig it up
select a Pokemon who knows dig.
Dig is not a HM in Pokemon Platinum but a TM, it can be found in the ruin maniacs cave.
go underground
If you dig underground and dig in the walls you can get heart scales.
There are everywhere, you just have to dig.
In the underground
you have to dig it up when you are underground
Dig for it underground. Its rare but it is possible to dig one up
Yes, you can dig up a waterstone in Pokemon platinum underneath the resort area.
Dig, but i can't get it to work either