Super Happy Magic Forest S01E51 - Mermicorn

The Witch, who was trapped in a Merhaven clam shell while pinching a pearl, grants Blossom a single wish to thank her for releasing her and saving her life. Blossom excitedly chooses a mermaid's tail to improve her swimming. However, when the Merqueen complains that her pearl is missing, and the heroes have to quest to get it back, Blossom soon realises how tricky a mermaid's tail can become on land.