Beat the Elite 4 and Lt. Surge today. I had been waiting on getting a Rhyperior and the TM for Ice Beam before I went in (and you know, finals). I faced them almost immediately after I got what I needed. I also finally managed to get 10,000 coins. Since I already was getting the TM I was saving for, I just got Thunderbolt instead.
My team was all lvl 45 and consisted of: Jynx, Ampharos, Jumpluff, Dragonair, Typlosion, and Rhyperior.
Karen surprisingly gave me the most trouble. That Houndour took out most of my team. Surprisingly, it was Jumpluff that took him out. Leach seed and headbutt combined with the sheer luck of making it flinch 3 times in a row did it for me. Jynx and Ice Beam made Lance a pushover. Everyone else was pretty easy though. Dragonair got the least amount of use which was a bit odd, I suppose.