1. Superman's Sugar Justice
2. Lex Luthor's Kryptonite Krunch
3. Mxyzptlk Alpha-Bites
4. Bizarre O's (Also: I call dibs on the t-shirt.)
5. Brain Bran
6. Metallo Mix
On a related note:
Transitioning from serial to cereal faster than a speeding bullet. Designed by Phil Postma.
On a related note: