Heres some information about all eight of the Gym Leaders.You should catch some fighting,water, or grass types in order to beat Roark.He has a Cranidos lv. 14, an Onix lv.12,and a Geodude lv.12. For Gardenia you need some Fire,Flying,and psychic types. She has a Cherubi lv.19,Turtwig lv.19,and a Roserade lv.22.Don't bring Normal types now Maylene is here!!! This Fighting type handler is weak against Flying and Psychic pokemon.She has an awesome Lucario thats on lv.30,a Machoke and meditite on lv.27 shes a little harder than the first two so Get ready.Whos next the water tamer Wake.You should bring  Grass and Electric types now.He has a lv.30 Floatzel,and lv.27 Gyarados and Quagsire.Don't use your Electric types while Fighting Quagsire because hes half Ground type.Byron is next.Being a Steel type trainer you should bring Water,and Fire types.Bronzor and Steelix are on lv.36.And Bastiodon is on lv.39.Fantina is a coordinator and Gym Leader. You should use Ghost and Dark types on her Ghost Pokemon.She has a Cute Mismagius on lv36,a Cool looking Gengar on lv.34,and a Nice Drifblim on lv.32.Volkner the Electric type Master has a Raichu on lv.46,an Ambipom on lv.47,Octillary lv.47,and a Luxray on lv.49.You should use Ground and Grass types on His Pokemon Team.I hope I helped with the Pokemon Gym Leader Information.Please check out the rest of this website made Just for you!!!