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The Check-X Quiz is a true-or-false test Mario must take in Mario & Luigi: Dream Team. It is run by Broque Monsieur and is located at the Pi'illo Blimport. When the brothers first arrive on Pi'illo Island, Broque is about to host the 612th annual Check-X welcoming quiz. Due to Luigi knocked unconscious near the Zeeppelin blimp, Mario must take the quiz alone. Two questions are asked throughout the quiz:
The true question must be answered by talking to the staff Brock on the green panel, or the true panel. The false question must be answered by talking to the staff Brock on the red panel, or the false panel. Mario will win 5 coins for each question he gets right.
When Mario, Princess Peach, and the Toads arrive at Pi'illo Castle, Luigi arrives and shares the coins he wins with Mario, and the two of them combined have 50 coins.