NO. MIIS. They are not characters. They are doodles of oneself for games that have no characters such as Wii Sports and Wii Play. What possessed Nintendo to let them into Mario Kart, I do not know. But, don't you think it's a bit narcissistic to want to play as yourself instead of a
Nintendo character in a game meant to be a great crossover fighter
for Nintendo characters? As yourself instead of a
Mario character in
Mario Kart? Note I'm not targeting you, but I've heard this idea so many times and to be blunt, it's terrible and purpose-defeating.
"He's only been in one game" isn't my excuse for not wanting Geno. I just don't think he belongs in Super Smash Bros. He should be living peacefully up on Star Road right about now. Gaz probably sold the doll he inhabited to a museum: This doll came to life and saved the world from Santa.
Kawashima isn't quite on the same level as Mr. Game & Watch. For one, he's not REALLY a video game character--he's a real-life dude. Of course, the real one isn't a floating head.
Now, as I have said before, I did want Miis to appear in Brawl as the successors to Fighting Wire Frames. That would be rather amusing. And Kawashima would be awesome with not a playable appearance, but a
different kind of appearance.