the first mii you make should be your personal mii. if you
already have a personal mii, well then im not sure how to delete it
but you can edit it to look different.
On the Wii menu press A on the Mii Channel choose Start and
choose New Mii play around with the various settings to create a
Mii that represents you. Once your done save and quit and your mii
will enter the mii plaza you can edit your mii here as well as
delete them and put them in your Mii parade.
How do you make a strong mii?
You make your mii buff by working out in wiifit if you have
unlocked the wii fit boxing challenge.
How do you get on the mii ranking board in the check mii out channel?