I found this article about Wii Party from Iwata asks, and it brought up something really interesting about Miis.
Link:
http://www.nintendo.co.uk/Iwata-Ask...ii-is-Harder-to-Handle-than-Mario-224412.html
Of course, this could mean anything. Miis have been thrown in lava in Mario Kart, flung into volcanos in Wii Party, and have been eaten by fish in Nintendo Land. But I do have to wonder. Could Mii usage rules keep Mii out of Smash? Is a T-rated fighting game too violent that it causes a violation of the Mii rules?
and of course, I had to find this right when I started opening up to the idea. >_>
People need to stop bringing up the whole "T Rated" thing. Smash is first and foremost a Japanese made game. In Japan, all three Smash games have the CERO rating of "A", which is for all ages.
While yes, the Japanese have different standards for what is acceptable for a younger audience than outside it, it also means that having Miis participate in fictional slapstick games of sumo wouldn't really seem that 'bad' to the point Nintendo forbids them from being in Smash.
Especially since, like the examples you brought up, Miis can be flung into volcanos, fall in lava, eaten by fish, etc.
And even beat each other up by boxing, judo, fencing, etc.
As for this interview in question, it's more along the context of things that would
disturb a player at the expense of a joke.
Like maybe, it's ok for someone like Mario and Link to drown in games like Super Mario 64 and Majora's Mask or for someone like Wario to be deliberately set running around while on fire and burnt to a crisp/crushed into a pancake/inflated by a bee sting/etc. just to unlock a treasure or travel through the level, but not ok for the same happening to what is essentially the player themselves.
While it's scary enough happening to a fictional character (except Wario; it's downright hilarious when it's him since it's so over the top and is nothing but comedic inconvenience), it's
worse when the thought is invoked on the one playing the game themselves.
Smash doesn't really have much to worry about, since the worst a brutal attack will do is send someone flying off the stage. There are
some things, such as Snake's neck-snapping and the drowning in Brawl (though that's a little softened due to it just being they get tired from swimming and sink to the blast zone; not like Mario or Link choking to death on water in the previously mentioned games), but it's so much in the minority it won't really matter.
And the worst is some moves (such as again, the neck-snap) would be different on the Mii, much like Sony made NetherRealms alter the Fatalities on Kratos for Mortal Kombat 9 (though that was because they didn't want Kratos to be shown in humiliating situations such as begging for mercy before he is killed and instead try to go down fighting or just pissed off).
....I didn't mean to make this a long rant. I apologize.