Tropical-Rouge! Precure Episode 29: The Revived Legend! Pretty Cure, Charm Up!
Episode 29 of 46 of Tropical-Rouge! Precure, aired September 18, 2021, 25 minutes. Available with English subtitles and dub where released.
Episode summary
Manatsu meets the "Legendary Pretty Cure" in her dream. According to Laura, the Legendary Pretty Cure saved the world of mermaids and humans a long time ago. Meanwhile, multiple Chou Zettai Yarane-da are born from water, and appear throughout the town.