'The yelling won't stop': Yellies, the toy that is triggered by the shrieks of children, is debuting new characters after explosive holiday sales

The new Yellies options will cost $14.99 each.

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There are four new characters in the new animal archetypes.

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The Lizards' names are Lizabelle, Sal E. Mander, Scalez, and Echo Gecko.

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While the Bunnies will not be released until March, we got a sneak peek at what one will look like.

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Despite some skepticism, Yellies proved to be a holiday hit in 2018.

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According to a representative from Hasbro, which makes the toys, Yellies' sales tripled over the holiday season.

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"Performance was better than expected which resulted in some stores around the country being completely sold out," the representative told Business Insider.

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With the new characters, the era of Yellies is far from over.

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"The yelling won’t stop in 2019," a Yellies representative told Business Insider in an email.

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