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Today's Dealmaster is headlined by a number of sales on Mario games for the Nintendo Switch. The deals come as part of Nintendo's annual "Mario Day" event, which the video game company uses to celebrate its most beloved plumber, kart driver, golfer, boxing referee, typing instructor, prescription-drug supplier, and all-around mascot. The actual "holiday" arrives on Wednesday—March 10 = Mar10 = Mario, you see—but sales on various Switch games in the Mario universe are available throughout the week.