I've always been a fan of General Mills Monster Cereals for as long as I can remember and Boo Berry has always been my favorite of the gang. Below is an article I found about the intro of Boo and some of the market research that went into developing the famous cereal. Click on the article to go big for easier reading.
Back during in 2007, I shared an article about Boo Berry from the pages of Famous Monsters of Filmland. Here's the same article once again.