8BitDo has made the NES mechanical keyboard that Nintendo never did, but it's full of surprisingly competent hardware.
8Bitdo Retro Mechanical Keyboard review
8BitDo Retro Mechanical Keyboard, BT/2.4G/USB-C Hot Swappable Gaming Keyboard with 87 Keys, Dual Super Programmable Buttons - AliExpress
8BitDo Retro Mechanical Keyboard, Bluetooth/2.4G/USB-C Hot Swappable Gaming Keyboard with 87 Keys, Dual Super Programmable Buttons for Windows and Android - Fami Edition : Video Games
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8Bitdo Retro Mechanical Keyboard, Bluetooth/2.4G/USB-C Hot Swappable Gaming Keyboard with 87 Keys, Dual Super Programmable Buttons for Windows and Android - N Edition : Video Games