I'm not sure of the approved outfits for it but if you manage to go, there is a pre-event called "Preview Night" that happens on Wednesday evening.
Nice, a lot of professionals, exhibitors, and pre-registered guests, you can get lucky and see someone famous too!
I would like to go to the San Diego comic con one day.  have you ever been? I have not, although I understand its a multi-genre entertainment and also comic convention. I have seen on the internet that people dress up as their favorite characters.  Would i be out of place if i dressed up like Mr. Pickles, the dog from the cartoon network?
On the Wednesday evening prior to the official opening, professionals, exhibitors, and pre-registered guests for all four days can attend a pre-event ''Preview Night'' to give attendees the opportunity to walk the exhibit hall and see what will be available during the convention.