Nintendo’s eighth generation handheld, the Nintendo 3DS, has surpassed 20 million units sold in the U.S., according to VGChartz estimates. Pokémon Sun and Moon happens to be the top-selling 3DS game at retail in the US with an estimated 5.31 million units sold. Meanwhile, Pokémon X and Y has sold 5.13 million units; Pokémon Omega Ruby and Alpha Sapphire has sold 4.31 million units; and Super Smash Bros. for Nintendo 3DS has sold 3.19 million units.
Source: VGChartz.com