The hat that Ben wore looks exactly like Wildmutt's head.
The title references Freaky Friday, which is also about body swapping.
This was aired as the second episode in Australia and Asia.
This episode is based on the original series episode A Change of Face where Ben and Gwen swap bodies as a result of magic. However in that episode, it was done by Charmcaster, Hex's niece, while in this episode it was done by Hex himself.