Wubbox comes from My Singing Monsters, a monster breeding game where each creature sings or plays a different part of a song, and the Rare version is a rarer variant of the electric box monster. The in your walls twist grew online as creators took familiar game audio out of its island setting and placed it in dark rooms, a format that works well in horror and comedy edits on TikTok and YouTube. It has stayed popular because players recognise the sound instantly, while newcomers hear something strange enough to make a hallway seem haunted.