I am training
Herdier(he is useful) lvl.17
Timbour(The next gym is normal type)lvl.12
I have a panpour as well. I wanr to use these pokemon on the elite four I was considering leaveny for the dark and psychic ones. please include locations for pokemon
Edit: I now have a lvl.29 leaveny evo
First of all the normal gym has a Herdier (which is quite easy),
but it has a Watchdog (the evolved form of Patrat) which knows hypnosis so bring awakenings!
I would suggest getting your Servine to Lv.22
your Herdier to Lv.18
your Timbour to Lv.18
If you want more Pokemon get a Pidove(Male because when you finally evolve it to Unfezant Lv.32 the Female one looks so bad)
Or Blizle who has really good speed but bad defence.