I was browsing the cereal aisle once and comparing the sugar content of a bunch of cereals. The absolute worst is Quaker’s stuff. Their “healthy” cereals had more sugar than Captain Crunch or Count Chocula. And I thought that was impossible. I doubt that Little Debbie is going to be worse. Folks who buy cereals with names like Cap'n Crunch, Oreo O's, Twinkies, Little Debbie, Sugar [sic] Frosted Flakes, etc. don't concern themselves with sugar content, they expect it. My bashing of Twinkies cereal is that it failed in its implied premise, a product that would have a flavor and texture of a modified Twinkie. Cracker Jack cereal pulled that off. Oreo O's and Reese Puffs half pulled it off. Twinkies failed miserably. And it wasn't good even if other name were "Coconut Lozenges", and didn't ask to be compared to an iconic dessert cake.
The sweetest cereal in my memory was Super Orange Crisp, scoring over 70% sugar by weight. Its predecessor Super Sugar/Honey/Golden Crisp is nearly as sweet and is still around (Post).