Originally Posted by JP
Yes, but First Class doesn't contradict that at all since in First Class it was Beast (not Xavier or Magneto) who built a prototype of Cerebro that was inevitably DESTROYED by Riptide.
But Guard is right, he's referring to that particular Cerebro in the round metal room. Hence Magneto being able to move the plates around in X2...
I never said it contradicted it by Beast building it. It's not going to make any sense if Magneto comes back and helps him build another Cerebro though.