From General Mills monster-themed breakfast cereals on Wikipedia:
Franken Berry was very popular when first introduced, even though the initial batches of the cereal used a dye that didn't break down in the body, causing many children's feces to be bright pink -- a symptom sometimes referred to as "Frankenberry Stool."
From Chubby bunny on Wikipedia:
Fish's parents subsequently sued the school district and appeared on "Oprah" to warn about the dangers of Chubby Bunny.
Yes.