According to the Wii Region Compatibility List, about a fourth of the Wii Games do not work on other regions than it's own, but there is no stated reason. To me, it seems random which games work and which doesn't.
If there is a known way to make a game even more secure against downloading, there is no reason not too use it.
I'd like to know if upcoming games is going to have this kind of protection, particularly SSBB, which's Europe release is delayed.
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