BEIJING - Pop Mart’s shelves remain packed, but shoppers are no longer fixated solely on the snaggle-toothed Labubu dolls that once sparked hours-long lines and resale frenzies.  Characters such as Twinkle Twinkle, Skullpanda and Crybaby are drawing crowds of their own, commanding premiums on resale platforms and climbing the company’s sales rankings.Twinkle Twinkle plush pendants routinely disappear within minutes of restocking. On Chinese resale platform Qiandao, many of the character’s toys trade above official prices, while a plushie from the Crybaby Vacation Mode On series is selling at 72 per cent above retail.In the US, Skullpanda ranks as Pop Mart’s...