Yours for free if you buy Smash on both 3DS and Wii U.
"Sales and engagement are up through the first week compared to last year," says Activision.
Action-strategy game also releasing on PS3 via PlayStation Store.
Backgrounds, gamer pictures and special gifts up for grabs as Xbox One turns 1-year old.
Addresses matchmaking performance, UI, gameplay and title-specific issues.
But there's only a few in the whole game.