Help!

[Luxury Jirachi]

I cant beet the elite four. I cant even get past the first guy. >< My strongest pokemon is lvl 66. H e l p.
What do i do?.. i really neeeeeeeeeeed to win so i can trade with r/s! ;222;

 

[nachocheeez]

Well what Pokemon are you using to beat the Elite Four??? And what movesets do they have?

 

[Luxury Jirachi]

well.. My Charizard lvl 66 Moves: Mega Punch,Dragon Rage,FlameThrower,Blast Burn ,Moltres Lvl 50 Moves:Fire Spin,Fly,Fire Blast,Flamethrower,Zapdos lvl 50 Moves:Thunder Wave,Shock wave,Detect,Drill peck.0 Articuno lvl 53 Moves:Frustration,Steel Wing,Blizzard and Ice Beam.Arbok lvl 46 Moves:Acid,StockPile,Swallow,Spit up.Machoke lvl 44 Moves:Earthquake,Revenge , Vital Throw and Submission.
Those are my strongest pokemon. Boohoo.

 

[nachocheeez]

Okay, at first look your obvious weakness is not the right types to be having. Having two fire Pokemon won't do all that much good. From memory the gym leaders have ice, rock, ghost and dragon. You need to find their weaknesses and target them. Now I'll get onto the moves you taught them.
Charizard: Since he is weak against rock you should teach him something like earthquake to fix that weakness. Glad you taught him flamethrower and not fire blast.
Moltres: Kinda pointless for two fire Pokemon in my opinion. And your Moltres has way too many fire moves. Fire spin isn't that good and neither is fire blast. Keep flamethrow and fly and teach is something useful.
Zapdos: I think you should teach it thunderbolt to have a better electric advantage.
Articuno: Has some pretty good moves but once again there is no need for two ice moves really. Ice beam should be fine because blizzard is very inaccurate.
Arbok: To be honest I think you should replace Arbok all-together. It's weak against almost everything except psychic and it really just isn't that good.
Machoke: I'm liking the Machoke here. Earthquake is great and it seems to be pretty good.

 

[Moonlight.]

For starters, don't use Charizard, Articuno AND Moltres. It's bad enough having one Pokemon with a 4x weakness to rock, but THREE? I suggest getting rid of both Articuno and Moltres, but I guess it would be okay to keep Articuno.

Secondly, here I my suggestions:

Charizard - at that level is should be able to own the whole Elite 4 by itself. Get rid of Dragon Rage, it only does 40 damage so it's completely useless. Don't use Blast Burn either, you'll probably get killed by Bruno and Lorelei if you do. Earthquake would be good on Charizard, but you seem to have taught it to Machoke. Just keep using Mega Punch and Flamethrower and you should be fine.

Zapdos - Only just caught, pretty useless. Train it a bit and teach it Thunderbolt, it will do wonders against Lorelei.

Articuno - If you must use it, only use it for Lance. A few Ice Beams should beat him.

Don't bother with the other two. Your only problem will be a weakness to rock, but if you kill them quick enough with Articuno (the only rock types they have are also weak to ice), you should be able to survive.