There is no TM ledge climb,, I think you mean the HM rock climb.. You'll get it after you beat kanto leader blue en go to professor oak
Rock climb
You need to have the move rock climb
have a Pokemon who knows rock climb and rock smash
you use rock climb
yes you do in fact you need it to get most of the legendary pokemon.
Professor Oak gives you it after you get 16 badges
every where in the jonto region but rock climb is in the kanto region
You can now rock climb and do a whole lot more
if you want it from soul silver or heart gold you get it professor chen in kanto
you can find it in cerulean cave in the northeast corner of b1fyou to have a pokemon that knows rock climb
Talk to Professor Oak after obtaining all 16 badges.
You must get the rock climb HM from professor oak after you beat blue.