Back in the 1980s, it felt like there wasn't a single thing that was safe from Nintendo. The rapidly-rising gaming company was everywhere, and so were the stars of their video games. They even found their way into breakfast cereal.
Allegedly, half of the cereal tasted of fruit, and the other half tasted of berries. The fact that berries are fruit seemed to pass everyone by, but at least it provided an excuse for both Mario and Zelda to be on the packaging.