My team of eevee-lutions got me through the gyms after Whitney's just fine up til Clair's(I'm up to the dragon's den now). As I remember I beat Falkner's gym with Mareep, Bugsy's gym with Quilava, Whitney's gym with (don't remember but I'm sure it was female). then I got Eevee, breed Eevee, and took out Morty's gym with Espeon, Chuck's Gym with Espeon, The Steel girl's gym with Flareon, Pryce's gym with Jolteon and Flareon, and Clare's Gym with my dragon killer Vaporeon and Jolteon.
Vaporeon:Sassy lvl 39 ability: Water Absorb held: Splash Plate(although NeverMeltIce or Icicle plate might have been more beneficial)
attack:69 Defense:63 Sp. Atk:110 Sp. Def:91 Speed:63
Ice Beam(see where the NeverMeltIce or Icicle plate might have been more beneficial)