Nintendo Cereal System was a breakfast cereal produced by Ralston Cereals in 1988. The name of the cereal was based on the Nintendo Entertainment System, and promoted two of the most popular games for the NES: Super Mario Bros. and The Legend of Zelda.
The box of the cereal was divided in half. One side, called Super Mario Bros. Action Series, had fruity-flavored Marios, Super Mushrooms, Goombas, Koopa Troopas, and Bowsers. The other side, called Zelda Adventure Series, had berry-flavored Links, hearts, boomerangs, keys, and shields. The cereal always came with a sticker of a Nintendo character and Nintendo "Power Cards", a set of 12 trading cards, on the back panel. It also had offers to win NES Power Pads or a Super Mario cereal bowl.