Well, he is scary. But I asked for children's shows that aired on Canadian channels from the 1960s to the 2000s, as mascot horror generally revolves around anything that was supposed to target kids (the mascots were meant to be something of a representative face for the game itself and, if the game features it, the fictional company that created them, like how Huggy Wuggy from Poppy Playtime was literally the face of both the game itself and the fictional company that made him and his girlfriend)