TMs vary between generations. TM28 is:
|FRLG||Cerulean City, Celadon Dept. Store||2000||1000|
|HGSS||National Park, Celadon Department Store||2000||1000|
If TM28 is sold or used and then forgotten in Ruby or Saphire, the player will be unable to complete the Sealed Room puzzle and obtain the Legendary Golems except through trading a Pokemon that knows Dig over.