Re: The Cure from X Men The Last Stand: mentioned in Wolverine...
They didn't. But it's X-Men canon that Charles had an identical twin, and because of Charles strong underlying mutant ability for mind control, etc, during fetal development,he unwittingly took his twins mental abilities thus leaving him brain dead.
Most people assume that's who is on the bed in -3
"Train yourself to let go of everything you fear to lose"