How can you get gible gabite or Garchomp on Pokemon mystery dungeon explorers of time or explorers of darkness?

Gible is found in Landslide cave floors 1-12. You get Landslide cave by doing jobs that have ??? as their location. I don't know exactly but I know the wonder mail cod is for Garchomp- #Q%H 4#7H HJRM

=YHN P==0 -XT@

client:Garchomp Place: beach cave 1F Reward: Recruit Garchomp