They were an innovative pair when they debuted in 1971.
Count Chocula was the first chocolate-flavored cereal with chocolate-flavored marshmallow bits.
And Franken Berry was the only strawberry-flavored cereal on the market.
In 1972, along came Boo Berry, the first cereal that tasted like blueberries.
Monster cereals have found a life of their own, sustained by bloggers and video sharing sites such as YouTube.
The first boxes of Boo Berry
included a glow-in-the-dark sticker.