What is first to market squishmallow?

As an AI language model, I don't have access to current market trends and product releases. However, a squishmallow is a type of plush toy that has quickly gained popularity due to its cute and squishy nature. It's a versatile toy that has been used for comfort, decoration, and playtime. Due to its popularity, many variations of squishmallows have been released, and it's likely that there have been first-to-market squishmallows released in the past.