With good Fire of Fly Pokemon!
if you mean the gym in eterna, it's the 2nd gym and you have to beat all the trainers. The 3rd gym is in vielstone city
i think the 2nd gym leader is in Jublife or Oreburgh city.
well......you beat the 1st,2nd,3rd,4th,and 5th gym leaders
use either a fire type or a flying type to beat bugsy.
Volkner, he will be at the lighthouse, 2nd floor. Talk to him and he will go to the gym waiting. Uses electric types.
Try to use a flying Pokemon or psychic Pokemon, I used Ralts and Taillow to beat him. Yeah so try using flying or psychic.
beat the first gym leader then go down to route 32 go to union cave get out you will end out on route 33 go west and there is Azalea town. Beat the gym leader.
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.
Have you beat the 2nd gym leader yet? If not its like kinda impossible.
Go to the third
If by the legue you mean the elite 4, the Pokemon levels vary from 51-66. The types of Pokemon the trainers have are: 1st, bug 2nd,ground 3rd,fire 4th,psycic 5th,dragon and the once written before.
Eterna City