"you" cant
Chat with our AI personalities
I think you go to snowpoint and talk to someone and she gives you something to open it.
wayward cave
You can get the TM28 (Dig) on Route 214 in the Ruin Maniac Cave in Pokemon Diamond.
you need four to obtain the HM, five to use it. You get it when you go into the cave at Celestic town and observe the painting
get the HM strength, and teach it to a Pokemon