Kellogg's
Wikisimpsons - The Simpsons Wiki
Kellogg's have released many limited edition Simpson cereals including:
Bart Simpson's Peanut Butter Chocolate Crunch Cereal
and the Simpsons Family on limited edition packs of Kellogg's cereal they are:
Bart on Kellogg's Raisin Bran Crunch,
Homer on Kellogg's Corn Pops,
Maggie on Kellogg's Mini-Wheats,
Marge on Kellogg's Crispix
and Lisa on Kellogg's Cinnamon Crunch Crispix