In Pokemon red/blue, You should be able to grab Dig(TM28) in Cerulean City in a storyline fight, and you can teach dig to Diglett (common) or Dugtrio (rare) in Diglett's cave, if they don't already...
The English word 'dig' means 1: thrust down or into; 2: create by digging; 3: work hard; 4: remove the inner part or the core of; 5: poke or thrust abruptly; 6: get the meaning of something; 7:...