Cheetos Famicom Tournament (Japan) (June 1986)

Contestants in 3 age range categories (elementary 3rd grade and below, elementary 4th-6th grade, junior high and above) could compete in a 3-round timed event, aiming for the highest scores in Super Mario Bros., Mighty Bomb Jack, and The Mysterious Murasame Castle.

Rather oddly, the ad doesn't provide much detail on actual prizes.  All contestants receive a T-Shirt (presumably an advertisement for Cheetos), but regarding prizes for winners, the ad mentions domestic travel tickets (by train or by plane, it doesn't say), amusement park coupons, and "other luxury prizes."  How many prizes and what exactly they all are doesn't seem to be mentioned anywhere.