Where do you catch skarmory in fire red ive walked around ruin valley for ever ive seen natu wooper meowth Persian spearow fearow and wobbufett but not a single skarmory?

That's because it's not found in Ruin Valley. You're supposed to be looking for Skarmory in Sevault Canyon on Seven Island. Check out these pages:

http://www.serebii.net/pokearth/kanto/seavaultcanyon.shtml

http://bulbapedia.bulbagarden.net/wiki/Skarmory