Questions...

[Light]

I think I may have found a flaw in it. How do Pete and Maleficent get into Disney Castle if the Cornerstone prevents them? Answers please!

 

[Chaser]

It prevents Darkness and Maleficent. It didn't stop Pete because Pete use to live there.
Maleficent only went from wherever she was to the place where Pete was taken to

 

[Light]

Thankyou for answering that question!