Zink Imp
Smash Ace
The Wii had a feature where you could transfer Miis to a Wii Remote and then upload the Mii to another Wii. Not sure if this is still viable in the Wii U. If so, I guess that could be a time saver.I worry that'll happen, but chances are it won't. You see, people will have to make the Miis themselves which of course takes too much time (referring to tournaments and making them at the event).
I just like the idea of having so many customizable fighters, it'd be great to see them all battle at a tournament. Maybe we should start having Mii side tournaments.