Hi Colleen,
Great question!
To the best of my knowledge, Maleficent is rarely seen in the theme parks for meet-and-greets outside of the Halloween season. Sorry!
However, I'm really wondering if that'll change next year since the
Maleficent film will be coming out in the summer?
(If you haven't seen the trailer for it yet, put everything else on hold and go check it out. It looks awesome!)
Maybe that'll be a good excuse to book a Disney vacation next summer so you can see if she'll be roaming around the theme parks to promote her new movie!
Sorry I couldn't provide more definitive advice, but please feel free to write back if you should have any additional questions and I'll be happy to help in any way that I can.
Best regards,
Derek