https://wccftech.com/npd-june-2018-mario-tennis-nes-classic/

The NPD Group have released their full June sales data, and it seems it was a good month for The Big N. Consumers spent $1.08 billion on games and hardware, which is up 25 percent from $864 million last year. A lot of this increase can be attributed to a jump in hardware sales – this June, $350 million was spent on hardware, up 52 percent from the $231 million spent last year.

The surprisingly resilient NES Classic Edition, which returned to shelves in June, was the top console in terms of unit sales (the PS4 was top in terms of dollar sales). The Xbox One and Switch also did well – year over year Xbox One sales nearly doubled and Switch sales were up 50 percent.