It is rarely too easy, given its appearance, to distinguish between a plush toy of Stufful and the real thing. A popular urban myth tells of a trainer who reached the finals of a local tournament using poison pokemon and a remarkably tough Stufful to stall their way to victory. The ruse was revealed only in the championship, when the opponent's last pokemon (sometimes a Weavile, sometimes a Meowth) slashed the enemy "Stufful" and drew only stuffing from the wound.

Stufful toys do function as more effective versions of the Clefairy Doll, but the ruse also works in reverse. It is not rare to see a Stufful spontaneously join a large enough collection and begin playing with the toys, for they see and smell their kin in toys modeling pokemon as varied as Pikachu and Charizard. And the toys' owners, even if they are not pokemon trainers themselves, invariably welcome the Stufful. For not only do they consider Stufful adorable, but children often need to protect favorite toys from bullies, while collectors must worry about thieves, for rare plushies routinely fetch significant sums at auctions.

Stufful will maul anyone who touches it that it does not consider a friend, which makes them the perfect trap, at least for anyone who needs to lay traps among their stuffed animals. And these pokemon have protected so many plushies that philosophers often wonder if Stufful are in truth a sort of guardian spirit, a living toy brought to life to protect their immobile brethren. In support of this proposition, it must be noted that their definition of "friend" can be surprisingly broad; while Stufful do not hesitate to maul thieves seeking to sell valuable toys for profit, they will welcome strangers who simply want to carry away and enjoy said toys for themselves.