I have to say, Battling with the great Cynthia isn't easy at all, to start, I didn't have a solution to garchomp' weakness to Ice. My entire team had a weakness to Ice except for my Gastrodon, who still couldn't get the job done with her other pokemon. However Lucario was easy with my Orion (Staraptor) using a Brave Bird and Close Combat to finish the job. However during the Garchomp encounter I realized that having my owm Garchomp out wasn't the smartest idea, but it was faster then Cynthia's by using Dragon Rush and Earthquake to *Eventually* get the job done (also while using 3 hyper potions in the process), Her last pokemon was the oh so lovable Togekiss, who I could live to forget. she had KO'd everyone on my team except, EXCEPT, my Rhydon, which was 12 levels lower then Togekiss (I got it at Victory Road, give me a break). SOMEHOW got a critical using a flamethrower, and beating Cynthia! MY god that battle was both epic and nerve-wracking to say the least. This battle alone took 2 hours to worry, heal, plan, think and repeat. Will definitely train more at Victory Road more often though.
So That was my outing with Cynthia. Now I get why she is the champion of the Sinnoh League