Chinese toy maker Pop Mart has seen its sales in the U.S. plunge as it struggles to diversify beyond its popular Labubu plushie. The monster plushie that is known for being both creepy and cute gained popularity in recent years, becoming a viral fashion trend on social media as Labubu fanatics clipped key-chain-sized versions to their bags. Labubus helped Pop Mart generate more than 37 billion yuan, about $5.4 billion, in revenue in 2025, nearly triple what it made the year before, according to Reuters . But U.S. sales were 45 percent lower in March compared with the year before, according to Bloomberg Second Measure, a tool that tracks credit and debit card transactions. The data does not account for sales made through other payment methods, such as cash. Chinese toy maker Pop Mart has seen its sales in the U.S.…