Did you do the 15% or 100% patch? I am trying to pick one, don't really care about double channels but I would prefer to not semi-brick myself. Is one more or less likely to semi-brick you (I am on 3.1u).
Semibrick occours with double channels, which happens when you 100% update it. if you 15% update it it wont have the duplicate channels, but we're still not sure about the side effects of it.
only way to brick your Wii with SSBB is to update from 3.0 or earlier.
@Bunjolio, I don't really think your sister should be doing those things at a young age. No offense, but its likely possible that she got manipulated online?