You can get Rock Climb from Professor Oak after you've beaten all 16 Gym Leaders.
Chat with our AI personalities
you get it AFTER you beat blue
you get it from oak after beating blue
Beat Blue and go to Professor Oak in Pallet Town. He gives HM 08- Rock Climb to you.
its on cinnabar island. you have to have rock climb though. go to the Pokemon centre and go up to where blue is/used to be and use rock climb, then take the nearest rock climb to you and roll from there (:
rock climb