At one point in the plot, you will be told to go there. Only then will he move and allow you access.
you have to get to the bottom
You can find it in the outside area or relic castle
TM 26 Earthquake can be found in the Relic Castle
In relic castle
Relic Castle (Claydol Chamber) at level: 47, 48, 49, 50 in the wild:100%
The one at the very end, right beside the construction worker.
relic castle
Volcarona is inside Relic Castle.
Relic Castle in the desert
Relic castle
you have to get to the bottom
It can be found in the Relic Castle in Pokemon Black Or White
It's west of Desert Resort
one is in the relic castle on route 18
there is a backpacker in relic castle who will give you either a plume fossil (which is revived into an archen) or a cover fossil (which is revived into a tirtouga)
it is in the desert near relic castle
castle relic on your way to fourth gym