Super Smash Bros. Wii U and 3DS Discussion

Then why would he make a hat of a character already in game if that was the case. There's no need to recreate a character who is in the game already.

Because

A) You're assuming he's going to be in the game.

and

B) It clearly isn't the same "hat" that metaknight actually uses. The slit for the eyes is clearly bigger and not as wide so you know it's custom made specifically for miis.

(it's a mask, but miis probably won't have a mask option and it'll just be lumped in with hats. at least we know there will be extra categories within the given attire categories of the miis)