Where do you recruit Garchomp in Pokemon explorers of the sky?

Well, there is 2 ways: Sense you can't get Garchomp in the Hidden Land you can do this:

Get Gabite or Gible. go to Luminous Spring when you meet the certain conditions you can evolve them. You can find them in Shimmer Desert.

Lol, well, you can actually recruit a Garchomp, Ive recruited two in Shimmer desert.

I suggest making your leading Pokemon hold a Terra Cymbal and above 45