Tips for the Elite 4

1- Train all your pokemon to the high 50s. Your individual pokemon will always be stronger than the E4 members, but you have to factor in endurance.

2- Always have a psychic pokemon. Only one type (dark) is resistent to psychic attacks. this means you won't always have an advantage over the other pokemon, but you will rarely be at a disadvantage.

3- Buy a lot of ethers/elixers. Most of the really strong moves can only be used 5-10 times. If you constantly use these moves, you will have no chance later as they will all be depleted.

4- Save before entering. Most people do this anyway. But dont save after each battle. If you are too weak to continue, but you saved before the individual battle, not the whole E4 series, you will have to take the white out. Whiting out is expesive and makes your pokemon dislike you.

5- Purchase a lot of powerups. It is better to win poor that to lose rich. Money doesnt help you fight.