Basically, fake cereal, not (che)real. Chereal is most likely cheap, because it makes it easier to compete with
the brand they actually copied.
These brands are also usually named something nearly the same, something that means the same but is basically just a cheaper version.
The brands also have an image that relates to the actual brand it is
bootlegging, as well. Or something completely random. Like an image of three
African American kids running after a kangaroo.