YouTuber BalrogTheMaster claims that Nintendo has found the person who leaked the Super Smash Bros 3DS footage earlier today revealing unannounced characters and many other things. He claims that the leaker was an employee of Nintendo of America who was in the process of sending content to the ESRB for rating. Of course this isn’t confirmation, but if it’s true, then the Nintendo Ninjas caught him or her rather quickly.
http://mynintendonews.com/2014/08/26/rumour-nintendo-has-apparently-found-the-smash-bros-leaker/
This isn't confirmed yet,but if it's true,then boy oh boy that employee is in some serious trouble