You're talking about HM 08 Rock Climb. You get Rock Climb when you get all 8 Kanto Badges. After this, Professor Oak gives this HM to you.
Teach them the HM move Rock Climb
you cant actually climb walls but if you mean the rocky walls that's rock climb which you get from professor oak once you get access to mount silver
You'll need to teach a Pokemon the HM Rock Slide, which is located on Route 217, and then press A on the rocky wall and the Pokemon will slide up or downwards of it.
After you get the pokeflute you turn it on and go to the sleeping snorlax and it wall wake up you will be able to fight it at level 50
On the way to Snowpoint City. Behind a cottage on the way, you will find the HM Rock Climb. You can use that once you beat the seventh gym leader Candice. She uses Ice-Type Pokemon so have some good Fire-Types in your party!
rock climb
Teach them the HM move Rock Climb
beat all 16 badges and talk to profeser oak
you can get it at EB games wall-mart zellers and stors like that
On the way to Snowpoint city there will be a hiker in his house who claims he has ost the hidden machine Rock climb. The Hm is just behind his house in a pokeball
you cant actually climb walls but if you mean the rocky walls that's rock climb which you get from professor oak once you get access to mount silver
rock climb XD
After you get the HM Rock Climb, and a Pokemon knows it, you can approach a rocky wall, press A, and you will scale the wall.
You'll need to teach a Pokemon the HM Rock Slide, which is located on Route 217, and then press A on the rocky wall and the Pokemon will slide up or downwards of it.
After you get the pokeflute you turn it on and go to the sleeping snorlax and it wall wake up you will be able to fight it at level 50
On the way to Snowpoint City. Behind a cottage on the way, you will find the HM Rock Climb. You can use that once you beat the seventh gym leader Candice. She uses Ice-Type Pokemon so have some good Fire-Types in your party!
rock climb