Here is question SOMEONE in this thread may already have answered to in multitude of ways but basically:
I am planning to get IOSUHAX SysNAND running on my MAIN Wii U to do this modification. Otherwise, leaving it without CFW running most of the time. If I install legit Brazilian method JPN games, (or even US though I have NO reason to) - They should INSTALL without problem, as well as run without one, no?
yes, it should work if they are Legit and if you have modified your sys_prod.xml to make your WiiU Regionfree