In The Princess Switch 3, this relic is stolen, and both Queen Margaret and Princess Stacy must receive the help of their cousin, Fiona, who strangely looks like the two of them as well.
From the sound of it, it looks like Fiona might be getting the love treatment in The Princess Switch 3.
While the first and second movies usually focused a bit heavily on the love-lives of their main characters, it seems that the third Princess Switch film will be taking a different turn.
In the official synopsis released by Netflix, an important relic will be the main driving point of the third entry into the series.