Hmm, Poppy Playtime is a horror game, right? Modded versions usually alter the game in some way. Elmo is from Sesame Street, so there's a funny contrast here. The user probably wants an article or guide explaining this mod. But I need to check if such a mod exists. Let me think. I don't recall any official mods for Poppy Playtime, especially one involving Elmo. Maybe it's a fan-made mod or a joke. Could be a prank mod that replaces the horror elements with something cute like Elmo.