This contestant was on the show in November 1999, and if he had played Pokemon, he would have earned $250,000 extra for a total of $500,000 but even with narrowing down the choice to two, he couldn't get it... or he should have known about Lord of the Rings too:
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This is less acceptable... already in the year 2009 and this guy doesn't know the color of Pikachu, but luckily his friend did and earned him some money: