Nintendo's holding a 3DS Smash Tournament no July 25th at SDCC:
Starting at noon, there will be a preliminary round in which groups of four competitors battle it out, with the winner advancing. During the finals, players will duke it out one-on-one to determine the top smasher. Tournament slots are limited, and fans will be able to sign up the day of the event on a first-come, first-served basis.
For fans not able to attend San Diego Comic-Con, tournament action will be streamed live on Nintendo's Twitch channel at http://www.twitch.tv/Nintendo. Additional Nintendo Gaming Lounge activities will be announced in the future.