Reviews, including mine, have been reverent. This should come as no surprise given the Switch’s swift sales and the obvious pent-up demand for a new Mario game. at least, breezing past a million sales in under five days here and selling more than 2 million worldwide - and counting. Super Mario Odyssey is the fastest-selling Mario ever, in the U.S. Nintendo’s having a good year, and it looks like the latest Mario is set to make it even better.