In its traditional post-NPD response, Nintendo announced that Wii has sold over 20 million units in the United States to date.
The system reached the milestone in 31 months, leading Nintendo to again declare the system to be "the fastest-selling console in history."
That announcement comes even as the console saw a massive year-over-year drop in May sales. While the system handily outsold every other current system (except Nintendo's own first-place Nintendo DS) this month, it also had the greatest decrease from last year, falling 57 percent from 675,100 sales to 289,500.
Nintendo DS, on the other hand, was the only system to grow year-over-year in May, thanks in large part to the launch of the new Nintendo DSi model. System sales were up 40 percent to 633,500, with Nintendo noting that 390,000 of those were DSi units.
The company also said total Nintendo DS sales in the U.S. have exceeded 31 million.
Games for Nintendo platforms were also highly represented on the May sales chart; the manufacturer pointed out that six of the top ten games were released for Wii or DS. Of those, only one -- Active from EA Sports -- is not a first-party title.
Nintendo of America sales and marketing EVP Cammie Dunaway pegged the success on Nintendo's ongoing efforts to target the broader market.
"The continued enthusiastic consumer response to our products shows that Nintendo has something for everyone. For Nintendo, precision motion controls and social gaming are realities today," she said.