Lucca Comics and Games is a bit like Comic-con except in a medieval walled city, which goes well with a lot of the costumes.
World of Warcraft?
Sonya Blade, Subzero, and Scorpion of Mortal Combat
Space Ghost and ?
Misa from Death Note and Yoko from Tengen Toppa Gurren Lagaan
R2D2 (remote control), Trinity, and Cat Woman
? and ?
Misato, Asuka, Pen-Pen, and Unit-01 from Neon Genesis Evangelion
Pyramid Head and Nurse from Silent Hill
flower head and sackgirl (?) from Little Big Planet.
Resident evil soldier
Resident evil soldier?
Boba Fett and Boba Fett
Astro Girl and Astro Boy with mini Dracula
Spartan from 300
Little Big Planet (? and ?)
? World of Warcraft?
Bad guys from Batman (Catwoman?, Penguin, Joker, Batman, ?, ?, Robin?)
Free Hugs (not bad, but the $1 hugs are better)
Edo period Samurai
Hit girl from Kick Ass
Mr. Ping and Soothsayer of Kung Fu Panda 2
Phineas and Ferb (and an elf and ?)
The Corpse Bride
Misa and Yagami Light from Death Note
Imperial Officer and Storm Trooper
Neru Akita (?), Hatsune Miku, Kagamine Rin, and Kaito of Miku Miku Dance
? Lord of the rings?
Hit Girl and Kick Ass
Storm Troopers having a little wine break at the cafe.
And, of course, pedobear!
Thanks to Jared Davenport for the IDs!