In Brazilian folklore, there’s a boogeyman that goes by several names, one is “velho do saco” (PT) or “homem do saco” and it seems in Olinda, he’s called the Cariri. The character is a Carnival prank, based on an old man from a town called Cariri who used to come to Olinda selling herbs. It seems he eventually became tied to the legend of the boogeyman.
The legend itself became a Carnival group in Olinda and the semi-fictional documentary below (2nd video) shows the Cariri coming to town as well as the Carnival group in question. There was apparently both fear and excitement about the character, partly for the legend of taking naughty kids away in a bag and partly for the fun associated with the Carnival group.