If you’re talking about the plush version of Five Nights at Freddy’s characters, these plushies are based on in-game items rather than the characters themselves. Since Fazbear pizza is a marketable location, it’s only assumed that it comes with its own merchandise. The real-world Five Nights at Freddy’s merchandise mirrors the in-game version, hence the less horrifying design. However, several figure collections and various other pieces of merch showcase the terrifying, nightmare version of the characters. I understand that the cuter versions are more popular, so they are possibly more of what you’ve seen in store, but I promise terrifying game merchandise exists!