You must go to maghoney town.. where the lake of rage is . You must have a Pokemon that learns surf. But before you can enter the lake of rage. Two team rocket grunts will make you pay 1k of gold to enter the lake. Once you pay your gold you will enter the lake of rage. There will be trainers looking for a battle in the lake of rage so be prepared. Keep going straight until you see water that you can use surf. You should see a red garaydoese (Magickarp's evolve form.) there. Defeat it or capture it and that Pokemon shall drop the red scale. I will recommend you not throw trade or sell that red scale. you can get groudon later with it.
There is no such thing as a rock scale.
beat all 16 badges and talk to profeser oak
defaet traner red
Ash Ketchum ain't in Pokemon G & S. But Red is here in Mt. Sliver.
There Isn't
I believe you have to look for Red Gyarados for a Red Scale.
in the radio tower
i never heard of sliver version...
Give the red scale to Mr. Pokemon (The guy who gave you the mystery egg in the beginning of the game) and he gives you Exp. share for it.
you trade it for your red scale to mr. Pokemon
you can get an exp share by giving mr Pokemon the red scale you got after beating the red gyarados in the lake of rage.
After you beat the red garidose at the lake of rage.