I wanted to give my opinion on how Queen Genevieve (Princess and the Pauper) is NOT Princess Genevieve (12 Dancing Princesses).
Princess Genevieve is logical, she easily figured out Rowena wasn't right. She could have done so Preminger too.
At the beginning of the movie, Queen Genevieve and the king were shown. The king's appearance was no where near Derek's.
When the kingdom had gone bankrupt, she could have asked for help from her sisters, as atleast some of them must have married kings.
In the website, Barbie Movies Wiki, it is said that Princess Genevieve's eyes are dark blue
. It is also written that Queen Genevieve's eyes are deep
Their hair colors don't make sense. The queen's hair should have been lighter than the Princess' as she was older