Hey guys, I need some help with beating Fern when you battle him the the grand hall after Shelly, usually he would be easy, but the combination of his Roserade having hidden power fire, giga drain, extrasensory, sleep powder, and leftovers is proving to be difficult. The pokemon that I currently have are Mawile, Klang, Foretress, Wormadam-T, Onix, and Empoleon, all at lvl 35 with exception to Empoleon who is lvl 36. Have any advice? I can post sets and other info if you think that would help.
Thanks!