You get rock climb at the one of the gyms
you will get rock climb once you have all the badges in the kanto region.
Mt. Silver At the beginning use surf instead of rock climb.
Hm08 is rock climb not waterfall. Hm07 is the move waterfall
rock climb
After you have Rock Climb, you can go to Cinabbar Island and find all items, and to you have to go to Mt. Silver Summit to battle Red. That are the things you need them for
you get it after you have all the gym badges from kanto and johto regions.
You need to have the move rock climb
rock climb
You can go to Mt. Silver, which Professor Oak gives you permission to go to. Then you can battle Red.
you must beat all of the kanto gym leaders and oak will then give it to you
Rock climb
You can find it at cinnabar island but you have to have the move rock climb to get it