- Yo-kai Watch: Main game series:
- Yo-kai Watch animation: Minor Yo-kai
A greenish Yo-kai with a swirl on top of his head, purple lips with a blue tongue with his mouth gaping, and two purple rings under him.
He causes many forms of queasiness in people.
Spewart can be befriended in BBQ, near Dukesville. Upon befriending him, the player now can use his helicopter in order to move through BBQ. If the player feels queasiness (thus causing the helicopter to move erratically), they must grab Calming Candies in order to recover themselves and allow a smooth flight. During the first flight they began to puke.
Spewart is a portmantaue of the word "Spew" (as in letting something out, like a belch) and the name "Stewart".
"Náuseo" is derived from "Náuseas" (Sickness).
Spewart's early concepts reveal that he was based on Yo Oizumi , the voice actor who had the role of fellow Level-5 franchise Professor Layton's titular character though the current design looks less like Oizumi.
- Spewart does not have his real life medal counterpart.
In other languages
- Italian: Cinetosio
- Spanish: Náuseo