Frosted Flakes is the brand name, there's knock off brands of Frosted Flakes. Frosties and Frosted Flakes are the exact same thing, made by the exact same companies, with the exact same 'mascot'. But they probably called them Frosted Flakes here because Frosties are a frozen drink here. (and to me Frosties sounds more like a drink/ice cream then it does a cereal... which is dry... unless you add milk... and not frosty at all...) So Frosted Flakes makes more sense name wise. Since they are flakes of cereal frosted with sugar