In its first 3 days on sale, Super Mario Bros. Wonder has become the fastest-selling Super Mario game ever in Europe.

Also, from Famitsu sales in Japan: Super Mario Bros. Wonder for Switch was the highest selling new release of the week, opening at 638,634 retail copies sold https://www.gematsu.com/2023/10/famitsu-sales-10-16-23-10-22-23