Roxanna, located in Rustboro City. She specialises rock pokemon, and uses two geodudes lvl 12, and anosepass lvl 14.
Brock is the first gym leader in pewter city.
The first gym in Pokemon diamond is in Oreburgh City
You kill the Gym Leader's Pokemon with your Tepig.
From the 1st gym leader
Ok i don't get you The 1st gym leader is Roark. Candice is the 7th gym leader. Ummm, dude who answered... they mean what Pokemon does Candice use first. and the answer is Snover i guess
he's in oreburgh city
after you've defeated the 1st gym leader
Geodude, Cranidos.
in her gym u have 2 beat veilstone & pastoria 1st
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.
on cinnibar island beat the 7th gym 1st tho
well......you beat the 1st,2nd,3rd,4th,and 5th gym leaders