Among them are a red Among Us crew mate with an egg on their head, a purple crew mate decorated with a leaf, and even monstrous Imposter variants of both. But one of these costumes has a special feature that lets you play as a bone variant, emulating the comical corpses that are left behind whenever a crew member is killed by an Imposter in Among Us.
Technically, there’s no unlocking this skin, and you can’t really put it on at will. Allow us to explain.
Source: https://www.distractify.com/p/fall-guys-among-us-bone