Cynthia

[Link]

I am having trouble defeating her, they made her more difficult than in the Gen IV games, it seems.

If I remember correctly, I got to her 4th pokemon and lost big time. My team is Kyurem, Heatmor, Volcarona, Samurott, Krookodile, and Zekrom. They're all above level 50. Any tips would be great! Thanks.

[Blademaster]

Feed your Pokemon Trainers at the sports stadiums in Nimbasa City until they're at Level 65 or 70, then stock up on Ptions and Revives and Restores and go in there rape guns blazing.

Teach somebody on your team Toxic, too. It's great for Spiritomb and Milotic.