Dolphin Princess: The Crown of Valeria:

Having spent a few years on a safe island, Princess Silhouette goes back to the human world, after she learns about her late mother Queen Valeria's tiara being kept in a museum. Bringing her sand dollar steward Jarvis, Silhouette returns to her old home in Lavour, where the Lofts also have their eyes on the tiara. Consumed by their misery of now being homeless, which fuels their desire to be rich again, the Lofts have even left their adopted ten-year-old daughter Mary Beth to fend for herse...