Pokemon masters help needed.

[LikeDustInTheWind]

Like almost everyone has said before, grind until you can grind no more. Or begin again if your progress doesn't matter to you too much.

 

[EcHoFiiVe]

Everything should be at least level 40. If everything is 40+ and you stock up on potions you should be able to just choose a type to counter a certain Elite 4 and beat all of their pokemon with only 1 of yours.

 

[nuba km]

Grind like crazy, and get a fair amount of electric attacks ready.

In all honesty thats what it comes down to is grinding. i.e currently doing my elite four run on white, and I am not facing anyone until my party is universally at level 50

Hey what party are you using?

I just completed Elite 4 on black and I used

Samurott - 50
Haxorus - 51
Galvantula - 49
Conkledurr - 51
Victini - 48
Gigalith - 50

I've since replaced nearly all of that team lol.

all my pokemon were lv 44 apart from excadrill (the mole as I nicknamed him) who was lv 46.

 

[Assassin Xaero]

Did you try and avoid every trainer in the game or something? Even ignoring wild ones, my team is at least around the mid 40's by the time I get to the elite 4.

currently doing my elite four run on white, and I am not facing anyone until my party is universally at level 50

The elite 4 on black/white is a joke...

Spoiler: Elite 4 black/white types spoiler

They are ghost, psychic, dark, and fighting. If you have a dark type, that is half of them gone. I even beat one without taking a hit (yah strategy). And the other two just use psychic or fighting.

 

[the muffin man]

Mine were just a bit lower, basically when i got through victory road my party was as listed above. I restarted the game a few times halfway through, so I'm late to the pokemon leauge.