Allister Cooper, 2011

Chosen answer: Her power works by manipulating parts of the mind. Since Victor and Logan both regenerate her power can't affect them because they essentially "heal/regenerate" the part she is manipulating. Granted Prof. X threatens Logan with this in the original movies, but he is much more powerful, or could have been bluffing.

Chosen answer: First of all, Stryker was in "X2", not 3. Secondly, Wade was never his son. Stryker only has one son, named Jason. In this movie he can be seen encased in ice (to protect people from him), but it is obviously him (note his eye colour - one brown, one blue). It's far from unthinkable that sometime between this movie and "X2", his father's experiments on him put Jason in a wheelchair.

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