BEIJING, Aug. 29 -- The mini Labubu craze is showing no signs of slowing down as the latest series from Chinese toymaker Pop Mart sold out almost instantly worldwide.

The dolls vanished within minutes in key markets including the United States, Japan and South Korea when pre-sale began this morning, Bloomberg reported.

According to the newswire, demand so intense in China when the toys went on sale last night that Pop Mart's WeChat store page froze.

"The popularity of the new series has already demonstrated that consumers' enthusiasm for Labubu remains strong," Richard Lin, an analyst with SPDB International Holdings Ltd was quoted as saying.

Pop Mart's shares swung wildly in Hong Kong this morning when trading began, rising as much a...