Mermaid Pearl (Japanese: 人魚の宝玉 Ningyo no hōgyoku) is a Fusion Item from the Yo-kai Watch series. It is the item used to evolve Mermaidyn into Mermadonna in the mainline series and Ningyo Son Shoukou into Yao Bikuni Son Shoukou in Yo-kai Sangokushi.
Description[]
| Games | Description |
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| YW2, YW3, YWB | "When a mermaid is reborn, this exquisite pearl appears." |
Fusion[]
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Locations[]
| Games | Locations |
|---|---|
| Yo-kai Watch 2 | Jungle Hunter, Uptown Springdale |
| Yo-kai Watch 3 | Whatta Find (post-game), Shopper's Row (night) A Ghost Club Odyssey quest reward |
| Yo-kai Watch Blasters | Hunt for Ultra Tattleterror!RCC boss 1st prize reward Ring of Terror 8 Title MatchWDS challenge 1st prize reward Light Blue coin 1st prize reward Great Light Blue coin 1st prize reward |
| Yo-kai Watch Busters 2 | Mugen shop |
| Yo-kai Sangokushi | Light Blue coin 1st prize reward Great Light Blue coin 1st prize reward |
| Yo-kai Watch: Wibble Wobble | San Fantastico stage 206 rare drop Divine Paradise 6th level stage 22-61 Springdale Underground Waterway A stage 1-7 Enma coin reward |