Mermaidyn's Pearl and Song!

Plot
Liam and Milly figure out how the Yo-Kai Watch works until they meet a Yo-Kai named Mermaidyn, who had lost its Pearl to sing it with, so Milly decides to help the mermaid out.

Major events

 * Milly recieves Mermadonna's Yo-Kai Medal.

Transcript
Mermaidyn's Pearl and Song!/Transcript