4th Gen Can't beat the Elite 4 Champion...

[Arcanine_Fifty_Nine]

So I beat the Elite 4 with lots of revives and hyper potions... but there's no way I could beat the champion.. I can't even beat her Garchomp.
Any recommendations of Pokemon?

My current team:
Lvl. 45 Weavile
Lvl. 52 Girantina
Lvl. 57 Machamp
Lvl. 57 Lucario
Lvl. 59 Empoleon
Lvl. 61 Luxray

I can barely attack, all she uses is Earthquake and I can do nothing.
Help?

 

[Pokeyomom]

I forget Cynthia's entire team... But what are you leading with? Get that Lucario out front and start sweeping:) also, do you have an ice or dragon attack to deal with Garchomp?

 

[Arcanine_Fifty_Nine]

lol.. in reply to my own question.. I've gotta raise my Weavile a bunch of levels. Garchomp is weak against Ice x4. I should probably make my whole team around lvl 60 too :)

 

[Amore]

Yeah, assuming you don't have a griseous orb, i would advise getting a grass-type, or something that can learn a grass move, that resists ground/rock, coz you team looks like it gets pwnd by Bertha.

 

[Arcanine_Fifty_Nine]

I forget Cynthia's entire team... But what are you leading with? Get that Lucario out front and start sweeping:) also, do you have an ice or dragon attack to deal with Garchomp?

I'm not sure of it all either, I've only made it to Garchomp :P ..Well I've been leading with Machamp. I've got Icebeam with Weavile and Dragon Pulse with Lucario, Dragon claw with Girantina. I just have to get the attack in first. Weavile should be able to to that once he's a higher level :)

Yeah, assuming you don't have a griseous orb, i would advise getting a grass-type, or something that can learn a grass move, that resists ground/rock, coz you team looks like it gets pwnd by Bertha.

Yeah she was a pain. I had to use Empoleon, and that didn't get me too far. What grass Pokemon should I get?

 

[Yingxue]

I remember trying to beat her the first few times with only Dialga, doesn't work, lol.

 

[Amore]

I would advise a Roserade, as it's the fastest, however you could always go for a Cherubi off a honey tree then evolve it into Cherrim, but that needs sunny day to work.

So yeah, Roserade. I tend to give mine Giga Drain, Toxic Spikes, Sludge Bomb, and Magical Leaf.

Means you don't waste Giga Drains when you have full hp

 

[professor plum]

Level up your Pokemon.
An ice move would be appropriate for Garchomp. Teach it to something with decent speed, and it'll hopefully knock it out.
that's really the only thing I can recommend you to do.
Level up your level 40 pokemon, get them up to the 50s, and you'll be fine, I think. :)