NegaMetallix

Well... not really. A leak is when someone 'secretly' gives out information on a game/film/whatever which was previously unknown or yet to be officially revealed.

In this case, someone has released many different screenshots and videos showing footage of the new Smash Bros. on 3DS, revealing characters that have not been shown on the main website.

If that one leak about the Dog from Duck Hunt is true though, it's prettt likely that I won't get the game. I refuse.