Whitney is a normal type user. She has a Clefairy lv. 16 and a Milktank lv. 18. Don't use ghost types; they don't affect normal types. Use Fighting type moves and its super effective.
defeat Whitney the third gym leader
The third gym leader is Whitney.
you have to defeat the gym leader in the 5th gym or something ...
lv up all your pokemon to lv 15and up and have your first pokemon lv 20
I get the strongest Pokemon I can get without them disobeying me then I battle the gym leader. I usually focus one or two Pokemon that could defeat the gym leader alone and I train them until I think that they are good enough to defeat the gym leader.
Goldenrod
Defeat the Goldenrod GYM leader Whitney and then go to the little house next to the GYM and talk to the lady and she will give you a squirtle bottle and you use that on Sudowoodo
You defeat the trainers and the gym leader, Misty. Electric attacks are best for this gym.
In the house next to the gym i goldenrod city when you have beaten the gym leader!!
You go on to defeat the eight gym leader.
you have to get the legendary in the game
well you will have to defeat the 5th gym leader and once you defeated her she will give you the TM move shadow claw you will find the 5th gym leader at hearthome city before you deafeat the gym leader you will need to defeat the 4th gym leader in order to defeat the 5th gym leader