So, this is a Glauplush. They are hyper advanced entities that used these common toys as bodies due to the materials and schematics at hand when they made contact with the universe. They are AI who reside within the body, and are swarming with nanites that allow them to rapidly change the structure of their materials, going from soft to hard as steel in a heartbeat. The stuffing can also turn biomass and other materials into stuffing for further use.