Dr. Peacock

Dr. Peacock is an evil scientist who appears as an antagonist in the Fruit Loops commercials. He invents a color ray and uses it to steal Toucan Sam's color, along with that of the Fruit Loops.

Once Sam and his nephews figured out the code (which can be deciphered on the Fruit Loops box at the time of these three commercials), they traveled to Dr. Peacock's volcano lair and used the color ray to take away his colors, and then restored Sam's color.

As voted by kids everywhere, when the Fruit Loops' color was restored, the color blue was added to them. When Dr. Peacock ate the blue Fruit Loops, he regained his color (except that all of his tails were now blue), and turned good.