Barbie: Mermaidia (2005)

In the follow-up to Fairytopia, Elina goes to Mermadia to save her friend Nalu, the merman prince. Nalu has been kidnapped by Laverna's henchmen, who plan to use him to make Laverna the most powerful fairy in Fairytopia - even more powerful than the Enchantress! It's up to Elina to stop them, but she can't do it alone. She'll need the help of Nori, a mermaid who doesn't trust outsiders, and wants nothing to do with Elina. Winning over Nori isn't easy, but much harder challenges await. Saving Nalu could require the greatest sacrifice of her life: her wings. Can she do it, or will Fairytopia fall into the hands of Laverna forever?