I bought the Wii U at launch and bought a bunch of the cheap virtual console deals and ZombiU but don't use the system much anymore, my little brother decided to use it when he had a friend over and the kid made an account with a password on the system. I asked my brother to get the password and he says the kid forgot it.... so now an ugly mii is stuck on my Wii U. I there any possible way to delete the profile without the password?

I don't think it is possible to access (and therefor delete) a profile without getting the password. I'm not sure if there's any "recover password/lost your password?" options while trying to sign in to the account, but I'd try and see if there are any. If there isn't, I think calling or emailing Nintendo Support would get the account deleted.

From what I read on here. Someone reformatted their Wii U to get an unwanted account off.

http://techforums.nintendo.com/thread/19233

__________________
Flame Red Friend Code: 1246-9112-9541
Wii U NNID: DecemberJ