Before I faced Whitney, I made sure that the Machop I received from that trade was going to evolve. So, I basically EV trained her till she became a Machoke. I then traded Muscle to one of my friend's Gen. IV game and got a Machamp back. It was my trump card, the leader of my party. During most of the battles that took place in the gym, I mainly used Machamp to annihilate everything in her path.
So, after about five minutes of destruction, I finally came to Whitney. Feeling a bit cocky, I played my Quilava first. Bad mistake. Clefairy metronomeWater Pulse and O.K'ed Quilava. Oh well, Machamp could take care of them with a snap. Besides, my other Pokemons need leveling up. So, I took out my Kadabra. Kadabra used Reflect, but the damn Clefairy countered it with a Encore. So, for multiple turns, the Clefairy used Doubleslap and Metronome to kill Kadabra. Okay, it's time to take the gloves off. I finally chose to play Machamp. Killing the Clefairy was a breeze, but Whitney threw out Miltank.
This is where it really began. Machamp used Karate Chop, and Miltank's HP was cut in half. Mind you, this was an Adamant, EV trained Machamp. Oh, and this special Machamp is a female. Huh, amazing. Anyways, Miltank tried a Milk Drink, and it worked. So, I kept on using Karate Chop till a critical hit finally came and took Miltank down to a red. For some stupid reason, instead of using Milk Drink again, the damn Miltank attacked Machamp with a stomp. I laughed, and used Karate Chop again to win the battle.