Incredibox is a beatbox music game built around Polo characters, where each character adds one loop such as a beat, melody or voice when you give them an item. Fans often pull those individual loops out of mixes and share them on soundboards, which is how short Polo sounds like this doo doo vocal spread online. The Furby twist is a fan style take on the character, mixing the toy like voice with the game's simple repeating melodies, and the loop stays popular for remixes and edits.