Well, when I got there the person in the pikachu costume was running away XD. They had everything from GBA, GCN, and DS games to try, TVs playing the Anime, to a giant ceramic Ash and Lucario :) (at least I think it was Lucario). Lines were a mile long for downloading Pokemon, though the line for Celebi was probably 3 people heh. A few cosplayers and many little kids with their parents, wearing Lucario hats.
We were only allowed 4 Pokemon out of the top 20 favorites. I chose Blastoise, Raikou, Umbreon, and Tyranitar for my Emerald.
Though, the best part about the event was going to the union room, and battling random people, walking around near us and in line.
I would definitely go again next year, maybe even today If I'm lucky hehe.