ground/rock will be good
Beat the 3rd Gym, and Get HM 06 Rock Smash
ground. He is an electric type.
Pokemon from the 3rd gen (hoenn region) are in ruby
You have to skip the thied and go to the 4th then go to the third.
use phycic pokemon. but make sure you use giratina if you have one.
After beating the 2nd gym leader you need to see steven in the cave in dewford town if you have not already if you already talked to steven then talk to mr briney and go to slateport city from here go north to mauville city and beat the 3rd gym leader there.
I think you get it when you beat the gym leader hope its helps see im at the Pokemon league hard to remember
Go to Lavaridge City, use Rock Smash and the cable cars. Hint, hint
well......you beat the 1st,2nd,3rd,4th,and 5th gym leaders
use rock or ground pokemon. EXAMPLE: Ground Marshstomp/Swampert: Mud Shot Rock Geodude/Graveler: Rock Tomb/Slide
it depends on which gym because the 1st, 2nd, and maybe the 3rd they can beat the gym leader and if they have strong moves maybe even the 4th.
You use your strong(est) Pokemon to kill the Gym Leader's Pokemon.