“Mr. Miyamoto, the inventor of Mii, himself has been saying that, “In a sense, licensing Mii is same as licensing Mario – Nintendo should grant the license when we can conclude that the proposed project is worthwhile. Should we allow any and all the licensees to use Mii license for whichever projects, Mii’s brand image will be hurt. Because we are not granting Mario license to any and all, we should not do so with Mii either.This is the current policy of Nintendo. So, at the software development stage, we are consulting with the developers as to how they would like to make use of Mii, and our Licensing Department handles on a case-by-case basis.” -Satoru Iwata
I can’t blame Nintendo for wanting to make sure developers don’t ruin the the image of Mii characters, but it’s undeniable that there haven’t been too many titles that support the use of Miis except for a few games.
